Roadway: standards, defects and maintenance

Roadway: The Complete Guide to Understanding, Maintaining, and Modernizing the Road Network in Municipalities

The roadway represents in France a colossal heritage: more than 1.1 million kilometers of roads recorded in 2024, of which about 700,000 km are managed by municipalities. Behind the asphalt we walk on every day lies a sophisticated technical reality: multilayer structures, European standards, sizing, mandatory inspections, and accelerated aging due to traffic and climate. This guide details everything a manager, an elected official, a road service, or a maintenance provider needs to know about the roadway, its rules, its stakeholders, and its daily maintenance.

Presentation of the road: a road heritage often overlooked

In technical terms, a pavement refers to the part of a traffic way designed for vehicle circulation. Specifically, it is the set of superimposed layers (surface, foundation, base, binder, wearing course) that support traffic and transmit loads to the underlying soil. It is also referred to as the "pavement body" to denote this multilayer structure, as opposed to the wearing course alone, which is only the visible part.

Roadways can be found in a wide variety of contexts. Municipal roads, departmental roads, national roads, highways, industrial roads, parking areas, bike paths, bus lanes, agricultural access roads, and private driveways: the diversity is such that the design, maintenance, and lifespan vary significantly from one site to another. In fact, the same street may include several types of roadway depending on its purpose (traffic lane, parking area, sidewalk).

What exactly is a road?

The standardized definition comes from the texts of SETRA (now Cerema) and the NF P98-080 standard. A pavement is "a structural assembly of superimposed layers, designed to transmit traffic loads to the supporting ground under given service conditions". This definition encompasses both flexible pavements (based on bituminous materials) and rigid pavements (based on cement concrete), as well as semi-rigid and mixed pavements.

From a typological point of view, roads are generally classified into four major categories. The flexible pavements, which are predominant in France (more than 90% of the length), with bituminous layers on a granular foundation. The rigid pavements, made of cement concrete, mainly used on high-traffic highways and industrial areas. The semi-rigid pavements, with layers treated with hydraulic binders. And the inverted structure or mixed pavements, which combine several technologies according to the site constraints.

Why is the road strategic for a community?

A road is not just a simple strip of asphalt. On the ground, feedback from elected officials shows that it is one of the three most frequently mentioned issues by residents in satisfaction surveys, along with cleanliness and safety. Road infrastructure shapes the economic life of a territory, determines access to public services, employment, and commerce. It also represents the primary investment item for many rural municipalities.

The economic stakes are massive. According to the National Road Observatory (ONR), the heritage value of the French road network is estimated at over 2,000 billion euros. The chronic underinvestment in maintenance (estimated at around 30% annual deficit according to several parliamentary reports) results in accelerated degradation and a restoration cost multiplied by 3 to 5 when delays are too long. This is what is called the "cliff effect" in road heritage management.

What are the main types of roads encountered?

Technicians distinguish several categories of structures. The thick bituminous pavements (layers of asphalt on untreated gravel), the pavements with treated subbase with hydraulic binders (gravel-cement, gravel-slag), the inverted structure pavements (interlayered bituminous layer), the concrete pavements (BC), the continuous reinforced concrete pavements (BAC), and the composite pavements (concrete covered with asphalt).

In addition, there are special surfacing treatments: drainage-bound surfaces (BBDr) to reduce aquaplaning and noise, noise-reducing surfaces or BBTM (thin bituminous concrete), light-colored surfaces in tunnels, surface wear coatings (ESU) on low-traffic roads, warm or cold-bound surfaces for environmental considerations, and modular pavements in blocks or slabs for historic urban areas.

How many kilometers of road are there in France?

The French road network is one of the densest in Europe. According to figures from Insee and the Ministry of Ecological Transition, France has approximately 1.1 million kilometers of roads open to traffic. This total is roughly distributed as follows: 11,600 km of highways (concessioned and non-concessioned), 9,000 km of national roads, 380,000 km of departmental roads, and 700,000 km of municipal roads.

For comparison, there are approximately 35,000 communes in Metropolitan France, which gives an average of 20 km of local road per commune. The reality is obviously very unequal: Paris manages a little over 1,700 km of roads, while many villages have only a dozen kilometers to maintain, sometimes in very poor condition due to lack of resources.

What is the lifespan of a road?

The service life of a pavement is determined at the design stage, based on the anticipated traffic and the road class. For new pavements, a "service life" or "design life" of 20 to 30 years is generally considered for flexible pavements, and 30 to 40 years for rigid concrete pavements. However, what determines the actual end of life is the evolution of surface deterioration (rutting, cracking, spalling, potholes) and deep structural degradation.

The experience feedback from road services shows that beyond 15 to 20 years, the wearing course generally needs to be renewed, even if the structure remains sound. This is what is called programmed maintenance. Neglecting maintenance leads to accelerated degradation of the pavement structure, which may then require a full reconstruction rather than a simple resurfacing. The ratio is known: one euro invested in time avoids 5 to 10 euros later.

What materials make up a road?

A pavement is a multilayer structure, with each layer playing a specific role. The formation layer, at the bottom, prepares the supporting soil and ensures overall load-bearing capacity. The subbase layer, made of untreated (GNT) or treated gravel, distributes the loads. The base layer, generally made of gravel-bitumen (GB), directly supports the wearing course. The binding layer, made of BBSG (semi-void bituminous concrete) or EME (high modulus asphalt), ensures the transition. Finally, the wearing course, made of BBSG, BBM, BBTM or ESU, is the surface used for traffic.

Materials vary according to their functions. Aggregates from quarries (limestone, basalt, porphyry, alluvial), bituminous binders (pure bitumens, polymer-modified), hydraulic binders (cement, slag, lime), water, additives (fibers, adhesion promoters). Increasingly, recycled asphalt aggregates (AER) are being used, with recycling rates that can reach 50% or even 100% in base course asphalt.

What are the current trends in the road sector?

The sector has been undergoing significant technological changes since 2015. Several structural trends can be identified. First, decarbonization: warm-coated (reduction in manufacturing temperature from 160 °C to 130 °C, i.e., a 30 % reduction in emissions), cold-coated, vegetable or bio-based binders. The industry aims for carbon neutrality by 2050, in line with the commitments of the SNBC.

Next, the circular economy: large-scale recycling of asphalt, valorization of demolition aggregates, reuse of in-place materials (cold recycling technique). Several major national highways and motorways are today being renovated with 30 to 60% recycled materials. Third trend, the connected road: integrated sensors (temperatures, loads, cracking), inductive charging stations, photovoltaic markings. However, these innovations remain in pilot stage.

Finally, climate resilience: adaptation to heatwaves (thermal insulation), to floods (drainage, permeable pavements), to reinforced freeze-thaw cycles. Feedback shows that extreme weather events accelerate degradation and require rethinking materials and structures.

Road Regulations and Standards: A Demanding Technical Framework

French regulation regarding roadways is based on a set of legislative texts, technical standards, professional guidelines, and public reference documents. Understanding this framework is essential, both for the project owner (manager's responsibility) and for the civil engineering company (commitment of resources and results).

What are the texts that govern the design of roads?

Several texts structure the design. The Road Infrastructure Code (created by the law of June 22, 1989) and the General Code of Territorial Collectivities (article L. 2212-2 on the mayor's police powers) establish the manager's liability. The Road Code and the Urban Planning Code complete the framework regarding traffic, signage, and development.

From a technical standpoint, the guide for the design of low-traffic new roads (Sétra-LCPC, 1981, updated) and the catalogue of typical structures for new roads (Sétra-LCPC, 1998) remain the references. The technical guide for the design and sizing of road structures (LCPC-Sétra, known as the "LCPC-Sétra guide"), published in 1994 and still in use, is the main tool for engineering offices. Cerema, which merged Sétra and CETE, is today the reference public body on these issues.

What are the applicable NF and EN standards for roads?

The technical foundation is based on numerous harmonized standards. The NF P98-080 standard defines road surfaces and their terminology. The NF EN 13108 series covers bituminous mixtures: NF EN 13108-1 (BBSG), 13108-2 (BBTM), 13108-5 (SMA), 13108-7 (BBDr), 13108-8 (RAP, recycling). The NF EN 13242 and 13043 standards deal with aggregates. The NF EN 12591 specifies road bitumens, the NF EN 14023 polymer-modified bitumens.

For road concrete, the NF EN 206 (concrete, specifications) and the NF P98-170 series specific to concrete pavements are applied. Laboratory tests and in situ controls fall under several series of standards (NF EN 12697 for bituminous materials, NF P94 for soils, NF EN 13036 for surface characteristics). In practice, it is a real body of standards that must be mastered by laboratories and inspection offices.

What is structural road design?

Road pavement design aims to determine the thickness and composition of layers based on the anticipated traffic and the desired service life. The French method, known as the "rational method," is based on the calculation of stresses and deformations under a reference load (standard axle of 130 kN). The Alizé software, developed by the LCPC, is the reference tool for these calculations.

Several parameters come into play. The heavy traffic (classes T0 to T5 according to the number of trucks per day per direction), the supporting ground (classes S0 to S4 according to bearing capacity), the materials (rigidity modules, tensile-bending strength), the climatic conditions (frost, temperatures). As an output, one obtains a typical structure, which must then be compared to standardized catalogs and to the constraints of the site.

What is heavy freight traffic classification?

Traffic classification is a central element of the design process. The TMJA PL (annual average daily heavy goods vehicle traffic) determines the traffic class, and therefore the robustness of the road to be designed. Here is the usual grid:

On site, knowledge of actual traffic is often approximate for small municipalities. SIRIUS counts or temporary counters allow for refining the data, but this represents a cost. Practical consequence: many municipal roads are undersized compared to their actual traffic, which explains their premature deterioration.

What are the responsibilities of the road manager?

The manager (municipality, EPCI, department, State, concessionaire) has several cumulative obligations. First, the obligation of maintenance: keeping the road network in normal traffic condition. Then, the obligation of signaling: informing users of temporary dangers (construction site, closure, diversion), in accordance with the interministerial instruction on road signaling (eight volumes, referred to as IISR).

The obligation of monitoring is central. The manager must regularly inspect his network, identify dangerous defects, schedule interventions. Finally, the obligation of maintaining a documentary heritage: mapping plans, technical sheets, work history, incident registers. This documentary heritage, often referred to as "patrimonial database" or "road SIG", is the central element of sustainable management.

How often should a road be inspected?

The frequency of inspections depends on the type of road and its service level. Several levels of inspection can be distinguished:

Note that the frequency must be increased for heavily loaded routes, in areas of intense freezing, in coastal areas (salt corrosion), or recently repaired. Regular monitoring allows for the development of a genuine multi-year road investment plan (PPI), with a rational prioritization of interventions.

What should a road infrastructure file contain?

The asset file is the key element of sustainable management. It must include, for each road section:

• The up-to-date as-built plan, with location of manholes, keyholes, street joints, signage, and urban furniture.
• The inventory of sections, with their traffic class, their structure (boreholes, core samples), their age, their surfacing.
• Successive inspection reports, with VIZIR readings, deflection measurements, IQRN indicators.
• Work history: spot repairs, resurfacing, reconstructions.
• The associated markets and purchase orders (contracting companies, amounts, guarantees).
• Work statements DT-DICT, concessionaires' survey plans (ENEDIS, GRDF, Orange, Veolia, etc.).
• Traffic orders and any potential accident reports.

On site, this asset remains too often fragmented between paper plans, PDF files, and tacit knowledge held by one or two agents. However, in case of disputes, the absence or incompleteness of the file is almost always considered an aggravating fault. It is precisely this point that is pushing more and more local authorities to move towards a centralized and geolocated digital management.

What does the PMR accessibility law say about roadways?

Since the law of February 11, 2005 on equal rights and opportunities, public roads are subject to accessibility requirements. Decree No. 2006-1657 and the order of January 15, 2007 set the technical specifications. These texts impose, among other things, minimum pathway widths (1.40 m), maximum slopes (5% as a general rule), pedestrian crossings with curb ramps, alerting strips (BEV), and visual contrasts.

In addition, municipalities with more than 1,000 inhabitants were required to develop a PAVE (plan for the accessibility of roads and public spaces). Many did not do so, or let it fall into oblivion. However, recent jurisprudence increasingly penalizes accessibility shortcomings, particularly in cases of falls. This is an important point of vigilance for managers.

What risks does a manager face in the event of an accident related to the road?

The liability of the manager can be engaged on several grounds. Administratively, in the presence of a failure to maintain public works properly (unreported pothole, broken manhole cover, abnormal slipperiness), the liability of the local authority is engaged according to a consistent jurisprudence of the Council of State. The victim does not even have to prove fault; it is up to the manager to demonstrate that he has maintained them properly.

From a criminal law perspective, Article 121-3 of the Penal Code on deliberate endangerment of others may be invoked in cases of known defects not corrected that have led to a serious accident. Several mayors have been implicated in cases of fatal falls or serious accidents, with the investigation focusing on reconstructing the traceability of inspections and reports. This is what makes documentary rigor absolutely crucial, particularly the proof of knowledge of the defect and the processing deadline.

What are the main road surface pathologies?

Road surface deteriorations are classified according to a precise nomenclature (VIZIR method of LCPC). We distinguish type A deteriorations (structural): deformations (rutting, depressions), fine or wide mesh cracking, longitudinal cracks in the wearing course. And type B deteriorations (surface): stripping, shoving, bleeding, isolated potholes, transverse cracks, repairs.

Each pathology has identifiable causes. The cracking can be structural (deformation of layers) or surface (deformation of the coating due to heat). The coarse glazing indicates structural fatigue. The transverse cracks are often due to freezing, thermal shrinkage or age. The potholes result from water that infiltrates, freezes, degrades the layers and then pulls off the coating. Knowing these pathologies is essential to choose the right treatment.

Key actors and service providers for roads: top 10 companies and organizations

The French road construction market is driven by a few major industrial groups, regional SMEs, and reference public organizations. Here is an overview of the main players, along with their specificities. This list aims to inform the choice without any commercial hierarchy.

1. Colas: the world leader in roads

Colas, a subsidiary of Bouygues, is the world leader in road construction. Present in more than fifty countries, the group claims over 56,000 employees and a turnover of more than 15 billion euros. Colas operates its own quarries, produces its own emulsions and bitumens, and strongly innovates (Wattway, Vegecol, recycling). In France, the regional network is dense, making it an almost indispensable partner for local authorities, from the smallest to the largest.

2. Eurovia: Vinci's road division

Eurovia, a subsidiary of Vinci Construction (renamed Vinci Construction Proximité Routes in 2022), is one of the three major French players in the sector. The group employs more than 40,000 employees worldwide and operates a vast network of quarries and asphalt plants. Eurovia has developed recognized solutions: warm asphalt, high-recycling-rate asphalt, and signage. Its local agencies cover the entire metropolitan and overseas territories.

3. Eiffage Route: the third major French force

Eiffage Route is the dedicated branch of the Eiffage group, the third largest French construction company. The group works on major motorway projects as well as on local and departmental roadworks. Eiffage Route has aggressively positioned itself in low-temperature asphalt, recycling, and bio-sourced pavements. Its regional network, inherited notably from former local companies, makes it a well-established partner in all departments.

4. Pigeon TP: a powerful family actor in Brittany and beyond

Pigeon Group, based in Rennes, is the fourth French player in road construction. A family-owned company founded in 1929, it operates quarries, asphalt plants, and offers complete public works services. Well established in the greater West region, Pigeon has expanded its activities to several regions and remains a reference point for local authorities that prefer French capital-backed companies.

5. Charier: the Norman SME turned major group

Charier, based in Loire-Atlantique, is a major player in the Greater West, with a diversified activity (earthmoving, demolition, environment, materials). The independent group operates its own quarries and batching plants. On site, Charier is appreciated for its responsiveness, local presence, and ability to manage complex projects in urban environments.

6. NGE: a fast-growing challenger

NGE (New Generation of Entrepreneurs), based in the Var, has established itself as the fourth largest French construction group. The Routes subsidiary operates throughout the territory, with a positioning focused on proximity, innovation, and training. NGE has notably developed its own academy for public works training, making it a reference employer in the sector.

7. Cerema : the reference public expert

Beyond companies, the sector relies on public organizations. The Cerema (Centre d'études et d'expertise sur les risques, l'environnement, la mobilité et l'aménagement) is the reference public operator, resulting from the merger of Sétra, CETU, CETMEF, and CETE. Cerema produces technical guides, conducts applied research, and supports local authorities in their studies. Its publications are the bible for engineering offices and road services.

8. USIRF / Routes de France: the professional federation

The USIRF (Union of French Road Industry Unions), now known as Routes de France, brings together companies in the sector. It publishes professional guides, leads technical working groups, and defends the interests of the industry. It is responsible for producing sectoral statistics, such as the annual turnover of the profession (around 13 billion euros in 2023).

9. Study and inspection offices: Ginger, Antea, Egis, Setec

For design, inspection, and control, several engineering firms play a key role. Ginger CEBTP, the leading French company in road inspection, intervenes in quality control and pavement pathology. Antea Group supports clients in their technical studies. Egis and Setec, more focused on overall engineering, lead large-scale projects. Their expertise is generally required for structuring markets.

10. SMEs and Local Businesses: An Essential Network

Beyond the major groups, the French landscape includes several hundred SMEs and local companies specialized in the field. For routine works (pothole repair, temporary point, short section rehabilitation), a local SME often offers superior responsiveness and competitive cost. Many rural municipalities work with artisans known for decades, within a relationship of trust that makes sense. This diversity of players is a richness of the French market.

Are there any other notable players in the market?

The panorama does not stop at these actors. We can also mention Spie Batignolles Malet (a TP subsidiary of the group), Roger Martin (a historical actor in Burgundy), Jean Lefebvre (now a subsidiary of Eurovia), Sotraisol, Helios, as well as numerous analysis laboratories (LRPC, now Cerema regional, private laboratories). For markings and horizontal signage, we find Signature, Aximum (Colas group), Plastiroute, and others. The market remains dynamic and competitive, which is rather good news for the project owners.

How to choose a road maintenance service provider?

Choosing a maintenance provider for road infrastructure is a structuring decision. It affects the safety of road users, the legal liability of the manager, and represents a budget item that can amount to several hundred thousand euros per year for an average commune. Here are the essential criteria and pitfalls to avoid.

What criteria to select a good roadworks contractor?

Several criteria come into play. Certification and qualifications are at the top of the list: Qualibat, professional qualifications (FNTP), references on similar markets. Technical capacity is also crucial: appropriate equipment (planers, finishers, compactors), nearby asphalt plant (maximum radius of 50 km for hot asphalt), teams trained in modern techniques (warm asphalt, cold recycling).

The response time in case of emergency (dangerous pothole, subsidence, major defect) must be guaranteed, ideally within 24 to 48 hours for critical defects. The traceability of interventions is also a key criterion: detailed reports, before/after photos, geolocation. Finally, financial capacity and decennial insurance must be verified, particularly for structured multi-year contracts.

Should a large group or a local SME be preferred?

The issue often comes up in tender committees. Large groups (Colas, Eurovia, Eiffage) offer extensive coverage, significant technical resources, reassuring financial capacity, and strong R&D innovation. Local SMEs, on the other hand, often bring superior responsiveness, a detailed understanding of the local environment, and a more competitive cost of intervention for smaller markets.

On site, a mix can be relevant. A multi-year, fixed-price contract for routine interventions, awarded to a responsive local SME. A contract for major works (heavy refurbishments, multi-year programs) awarded to a large group. This subcontracting strategy is increasingly used and yields good results, provided it is well managed.

What questions to ask before signing a road maintenance contract?

Before any commitment, here is a list of concrete questions to ask:

• What are your professional qualifications (Qualibat, FNTP) and their validity dates?
• How many similar projects have you completed in the last 3 years for comparable municipalities?
• Where is your nearest coating plant located, and what is its capacity?
• What is your guaranteed response time for an urgent reported defect?
• What format do your service reports (paper, digital, application) have?
• How do you manage photographic traceability of construction sites?
• Are you able to propose alternative techniques (warm mix, recycling)?
• What is your policy regarding carbon footprint and circular economy?
• Can you provide client references for similar municipalities to ours?
• What is your ten-year insurance coverage and professional liability insurance?

How to formalize an effective roadworks contract?

A solid market must clearly define the scope. Inventory of affected sections (linear, traffic classes). Detailed price list (BPU with unit prices per technique). Specific operating procedures for each type of intervention. Intervention deadlines in case of emergency. Quality commitments and performance indicators (defects treated within 72 hours, quality of rework). Penalty terms. Tariff revision clauses (TP indices).

The market must also specify what is not included: exceptional claims (natural disasters, damage caused by third parties), ongoing regulatory changes, and proposals from the company for variations. On site, road services strongly recommend including an annual review clause to adjust volumes and techniques according to observed realities.

What is the annual maintenance cost of a road?

The cost varies significantly depending on the traffic class, the age, and the condition of the network. The ratios observed by the IDRRIM and Cerema allow for approximate figures. For optimal preventive maintenance, it is estimated to be 2 to 4 €/m²/year for a lightly trafficked municipal road, 4 to 8 €/m²/year for an average departmental road, and more than 10 €/m²/year for motorways.

For indicative purposes, a commune with 50 km of municipal roadways of an average width of 5 m (i.e., 250,000 m²) should theoretically allocate between 500,000 and 1 million euros annually for maintenance. However, the observed reality is often 30 to 50% lower, which explains the chronic maintenance deficit and the ongoing deterioration of the condition of the French municipal road network.

What mistakes to avoid when choosing a service provider?

Several recurring errors are reported by technical services. The first: relying on the lowest bid without a detailed analysis. An abnormally low price may hide defects (under-thickness layers, non-conforming materials, neglected finishes). The best-value approach, with a weighted consideration of quality, price, and delivery time, is more relevant on structured markets.

Second error: not requiring a Quality Assurance Plan (QAP) on construction sites. A QAP documents the company's internal controls (grain size, bitumen content, temperatures, compaction) and provides a real guarantee of quality. Third pitfall: forgetting the acceptance phase. Too many construction sites are accepted without independent checks (core sampling, thickness measurement, adhesion measurement), which significantly reduces the possible recourse in case of defects in the first few years.

Should road maintenance be internalized or externalized?

The "make or buy" question comes up regularly. Internalization (municipal or intermunicipal management) allows maximum responsiveness for small interventions (spot repairs, signage, light marking). However, it requires an appropriate equipment fleet and trained personnel. Outsourcing is generally the rule for major projects (resurfacing, renovations, new works), for technical reasons (heavy equipment) and economic reasons (economies of scale).

The hybrid model is very common. Municipal or intermunicipal patrols ensure routine monitoring and carry out minor works (manual time points, sweeping, snow removal, gutter cleaning). Multi-year service contracts cover technical interventions (automatic time points, ESU, asphalt joints). Structuring works contracts are awarded separately through dedicated tenders. It is a proven model that balances responsiveness and economic efficiency.

Comment KARTES does it improve road maintenance?

KARTES is a mobile and web application for managing field interventions, specifically designed for local authorities. Initially developed for anti-graffiti monitoring and urban planning, the platform perfectly applies to road maintenance, where traceability, geolocation, and responsiveness are particularly crucial. Here's how this tool concretely transforms the daily routine of every involved party.

What is the application's philosophy? KARTES ?

KARTES part of a simple observation: today, road management is often fragmented between paper documents, Excel spreadsheets, lost photos on personal phones, intervention tickets circulated by email, and citizen reports received at the town hall reception. This dispersion creates legal blind spots (it is impossible to prove that a degradation had been noticed) and operational inefficiencies (duplicate interventions, omissions, delays). The promise of KARTES, it's about centralizing, geolocating, and tracking all actions on a single simple tool, accessible to field agents as well as managers.

The approach is pragmatic: no heavy IT deployment, no lengthy training, no prohibitive per-user licensing. The agent opens their phone, takes a photo of the pothole, and validates it. The manager sees in real time what is being done on the ground, who did it, where, and with what results. Usage feedback shows that this type of tool saves agents an average of 30 to 40% of administrative time and gives managers visibility they previously did not have.

Comment KARTES does it improve the traceability of road interventions?

Traceability is one of the areas where the gap between traditional management and digital management is most spectacular. With KARTES, each intervention on the road is automatically timestamped, geolocated, and photographed. The application records the date, exact time, GPS coordinates, the agent involved, the type of action (report, safety measure, temporary repair, permanent repair), textual observations, and before/after photos.

In the event of an accident on the road and the involvement of the community, the manager can generate the complete history of reports and interventions on the affected section with dated and geolocated photographic evidence with just a few clicks. This capability radically changes the legal landscape. It is irrefutable proof that the obligations of monitoring and maintenance have been fulfilled, or alternatively, an early warning signal that allows the prevention of a disaster.

Comment KARTES does it make the road agent's job easier?

The road maintenance agent is the key link. Without their commitment, no tool works. KARTES was designed with him in mind first: simple interface, few fields to fill out, functionality even without a connection (data synchronize upon returning to a covered area). On the road, the agent opens his phone, takes a photo of the damage (pothole, crack, sinkhole), selects the type from a preconfigured list, optionally adds a voice or text comment, and validates. The operation takes less than two minutes.

For a weekly patrol, the administrative time spent upon returning to the office (data entry in Excel, scanning photos, filing, email transmission) goes from 30 to 45 minutes to zero administrative time after the patrol. Over 50 kilometers of road patrolled each week, the time saved is considerable: several hours per agent, which can be reinvested in more detailed checks or corrective interventions. And the quality of the data improves drastically.

How does the application help the community in its overall management?

From the community's perspective, the benefits are measured at several levels. First, in terms of visibility: the road maintenance service manager can see in real time the condition of his network. How many ongoing reports? How many planned interventions this week? Which areas have the highest concentration of defects? This dashboard replaces manually updated Excel sheets, which are often delayed.

Next, in budgetary management: data centralization allows for precise calculation of maintenance costs by section, by defect typology, by supplier. Feedback shows that this analysis often highlights costly sections that need to be isolated: for example, a street that requires 50 pothole repairs per year might benefit from a full resurfacing. Investment decisions become factual rather than intuitive.

Finally, in terms of communication: automated reports can be shared with elected officials, presented in working committees, or used to support grant applications to the department, region, or state (DSIL, DETR). Data becomes a shared asset, not tacit knowledge limited to one or two technical staff members.

What is the impact on the neighboring area?

The adjacent party is rarely the direct recipient of a business application. Yet, they benefit from it indirectly and sometimes directly. KARTES enables the setup of a citizen reporting channel, where a resident noticing a defect on the road in their neighborhood can take a photo, indicate the defect, and send it in a few seconds to the technical service. The ticket is automatically created, geolocated, and followed until resolution.

From the user's perspective, the benefit lies in the speed of response. A pothole reported on a Monday morning can be addressed within 24 to 72 hours, instead of several weeks or even months. On the ground, several local authorities that have implemented a citizen channel report a significant decrease in complaint letters and a tangible improvement in the perception of public service. It is also a factor in citizen loyalty and trust in the local institution.

What benefit for the maintainer or road service provider?

For an external service provider, KARTES also change the rules of the game. Instead of sending paper intervention vouchers or PDFs that get lost, the service provider receives his tasks directly through the app, with photos, geolocation, and precise description. On site, he documents his intervention (photo after repair), which automatically closes the ticket. The benefits are multiple: standardization of reports, administrative time savings, irrefutable proof of the service, and faster payment.

For the community, it is a way to audit the service provider's performance in real time: how many interventions have been carried out, in how much time, and at what quality level. Discrepancies between what was promised (for example, 48 hours for an urgent intervention) and what is delivered become immediately apparent. On the contrary, good service providers find in it a tool to highlight their work and demonstrate their reliability, which can influence the renewal of the contract.

Comment KARTES does it help reduce road costs?

Cost reduction does not happen by magic. It comes from several concrete levers. First, avoiding duplicates: without a centralized tool, it can happen that two reports concern the same pothole and trigger two interventions. With KARTES, the duplicate is automatically detected by geolocation. Secondly, prioritization: a critical defect (collapse, broken manhole cover) is immediately reported with a photo, which avoids unnecessary inspection trips.

Thirdly, route optimization: agents can group their interventions by geographic area using the integrated mapping, rather than making costly back-and-forth trips. Fourthly, prevention: fine traceability allows for the detection of sections with accelerated degradation and taking action in advance (planned resurfacing rather than multiple spot repairs). On the ground, communities equipped with such a tool report productivity gains of 20 to 35% and a reduction in emergency intervention costs of 15 to 25%.

Comment KARTES does it integrate with existing tools?

A frequent concern of local authorities is the proliferation of digital tools (road GIS, GMAO, park, HR, urban planning, etc.). KARTES was designed to integrate into this ecosystem rather than replace it. The platform exposes geolocated data exportable to existing GIS (QGIS, ArcGIS, GEO), can feed a /no GMAO in interventions, and offers CSV exports or API for consolidated reporting.

The goal is to not make any KARTES not an "information island", but a specialized module that communicates with the other building blocks of the community's information system. This open integration philosophy is appreciated by IT departments and greatly facilitates deployment. Concretely, a commune can test / KARTES on a few pilot districts for a few months, then gradually expand it to the entire territory, without abrupt breaks.

What are the concrete user feedbacks?

Early user feedback from adopting communities highlights three systematic benefits. The legal certainty: the ability to produce at any time the history of reports and interventions is cited as the top benefit. The productivity of teams: elimination of re-entry, administrative time savings, and better distribution of interventions. The quality of dialogue with residents: citizen reports receive a traceable response, transforming the daily relationship.

More broadly, the introduction of a digital tool transforms the professional culture of services. Employees shift from an execution mindset to a management mindset, which is highly rewarding. Managers move from reactive management (waiting for things to break) to proactive management (scheduling maintenance). Finally, elected officials have concrete indicators to manage road policy beyond the mere feeling derived from letters received at the town hall.

10 Frequently Asked Questions About Pavements: Everything You Want to Know

What is the average lifespan of a road?

A flexible pavement has a service life between 20 and 30 years, a rigid concrete pavement between 30 and 40 years. The wearing course, on the other hand, must be renewed every 12 to 20 years depending on traffic. Regular preventive maintenance almost doubles the useful life compared to a neglected network.

Who is responsible in case of an accident caused by a damaged road?

The responsibility lies with the road manager, generally the municipality for local roads. Administrative case law holds the manager liable in the event of a failure to perform normal maintenance, without the victim needing to prove negligence. Therefore, the traceability of inspections and interventions is essential for legal defense.

What are the main road surface pathologies?

Pathologies are divided into two categories. Structural deteriorations (rutting, large mesh cracking, deformations) indicate fatigue in the pavement structure. Surface deteriorations (potholes, transverse cracks, raveling, polishing, bleeding) mainly affect the wearing course. Each pathology requires a specific treatment adapted to its cause.

What standards govern the construction of roads in France?

Roadways are governed by the Road Infrastructure Code, the General Code of Territorial Collectivities, and the standards NF EN 13108 (bituminous bound mixtures), NF EN 13242 and 13043 (aggregates), NF EN 12591 (bitumens). The LCPC-Sétra guide from 1994 remains the technical reference for the design of pavement structures.

What materials make up a modern road?

A flexible pavement consists of several layers: surface, untreated gravel subgrade, gravel-bitumen base, and bituminous binder and wearing course. The materials vary according to traffic: BBSG for regular roads, BBM or BBTM for high-stakes roads, ESU for low-traffic roads. Recycling of bituminous pavements is progressing strongly.

How to know if a road is in good condition?

The condition of a road surface is assessed according to several indicators. Visually, using the VIZIR method, which inventories the deteriorations. Mechanically, through deflection measurements (curviameter, FWD) that characterize the structure. Functionally, through measurements of evenness (APL) and skid resistance (SCRIM). A complete audit allows for an objective diagnosis and the scheduling of interventions.

Should a road be regularly inspected?

Yes, several levels of control exist. Routine monitoring (weekly to monthly) identifies visible defects. The structured visual survey (every 2 to 5 years) inventories the degradation. Structural measurements (deflection, uni, adhesion) are carried out every 5 to 10 years. The more important the traffic, the higher the frequency.

What to do in case of a dangerous pothole?

A dangerous pothole must be reported to the road maintenance manager, who is legally required to intervene quickly. Municipalities often offer reporting via phone, online form, or mobile app with photo and geolocation. A safety intervention should normally take place within 24 to 72 hours, followed by a permanent repair.

What modern techniques exist for repairing a road?

Several techniques are used. Automatic time-point (PATA) repairs potholes with emulsion. In-place cold recycling (RFP) recycles the existing pavement with an added binder. Warm mix asphalt reduces carbon footprint. Surface wear coatings (ESU) renew waterproofing at a moderate cost. The choice depends on the diagnosis and site constraints.

Should a roadway be accessible to people with reduced mobility?

Yes, the law of February 11, 2005, and its implementing texts require the accessibility of the road network to people with reduced mobility. The obligations concern pedestrian pathways (width, slopes), boats at pedestrian crossings, warning bands, and visual contrasts. Municipalities must develop a PAVE to plan the progressive implementation of accessibility.

Conclusion: Preserving the road, a technical, economic, and democratic challenge

The road is much more than just a simple asphalt strip. It embodies at once an essential public service, a colossal heritage asset, a major lever for territorial attractiveness, and a key legal concern. Its management today calls for a professional approach, based on knowledge of standards, the rigor of controls, document traceability, and multi-year anticipation.

The regulatory and technical framework, which may seem dense, is in fact structuring. The NF EN standards, the Cerema guidelines, and administrative case law provide a clear reference for anyone wishing to act as a responsible manager. Compliance with these rules is not only a legal protection, but above all a guarantee for users, who must be able to move around safely, whether they are motorists, cyclists, pedestrians, or people with reduced mobility.

The selection of service providers (construction companies, engineering firms, laboratories) plays a decisive role. The French market offers a wide range of serious players, from global giants to local SMEs. The key is not so much to choose the cheapest option, but to build a balanced contractual relationship based on clear commitments, shared traceability, and a genuine quality requirement. On the ground, the most advanced local authorities are those that have structured their policy over several years, with a multi-year investment plan and regular performance monitoring.

Digital, finally, is deeply transforming the daily management of roads. Tools such as /no_break KARTES enable the road services to move from a craft-based management to an industrial management, without losing the closeness to the field. Centralization, geolocation, timestamped photos, real-time dashboards, citizen reporting: all these features save time, provide legal security, and improve the quality of service delivered to residents. Today, it is a competitive advantage for local authorities who want to offer the best to their citizens while optimizing increasingly constrained budgets.

To conclude, the road of the 21st century will be sustainable, recycled, connected, and traced. Sustainable, because the decarbonization of materials and techniques has become unavoidable. Recycled, because natural resources (aggregates, bitumens) are under strain and the circular economy is now a necessity. Connected, because sensors and data open up unprecedented possibilities for predictive control. Traced, because legal security for managers and physical safety for users demand it. It is up to each community to recognize the significance of this evolution and to commit now to transforming its road management practices.