With the onset of spring thaw or after a harsh winter, drivers are faced with an unpleasant surprise - the destruction of the road surface. The question of what exactly potholes on the roads are called ceases to be just a linguistic curiosity and becomes an urgent need for those who want to competently file a claim with the road service or insurance company. In everyday speech, we often use one word, but technical documentation uses dozens of different terms, each of which describes a specific type of asphalt destruction.
Understanding the difference between pothole and failure may significantly affect the outcome of your appeal to the traffic police or court. Incorrect classification of a defect in an application may become a formal basis for refusal to consider the case. In this article, we will analyze the professional nomenclature of road defects, their causes and repair methods, so that you can feel confident when communicating with utility workers.
Road destruction is a complex physical and chemical process that begins long before a visible hole appears. Water penetrating into microcracks freezes, expands and tears the asphalt concrete from the inside. That is why it is important to know not only the names, but also the nature of the occurrence of these defects in order to understand what repairs are required in a particular case.
Key terms: pothole, break and subsidence
The most common term for a pothole on the road is pothole. According to GOST R 50597-2017, this is a coating defect in the form of a depression or recess with peeling edges. Potholes are formed as a result of chipping of the coating material under the influence of traffic loads and climatic factors. It is important to note that in order for a defect to be considered a pothole, it must have certain dimensions that exceed the permissible standards.
Unlike a pothole, breach represents more severe destruction, often reaching the base of the pavement or even the soil. If a pothole is a local damage to the top layer, then a break indicates a violation of the load-bearing capacity of the entire road structure. Such defects often occur above communication hatches or in areas of soft soil where the foundation has been eroded.
The third important term is drawdown. This is a gradual decrease in the level of the road surface relative to the design level. Visually, a subsidence looks like a wide depression with gentle edges, in contrast to the sharp boundaries of a pothole. Subsidences are dangerous because water can accumulate in them, which will subsequently lead to the formation of deeper and more serious damage, such as cracks and breaks.
⚠️ Attention: Do not confuse subsidence with rutting. A rut is a longitudinal depression in the wheel runway that occurs due to plastic deformations of the asphalt in hot weather, while subsidence can occur anywhere on the road surface due to problems with the soil.
To accurately determine the type of defect, it is necessary to take into account not only its shape, but also its depth. Small potholes up to 4-5 centimeters deep are often called crawls, however, pothole remains the legally significant term. Understanding these differences will help you correctly fill out the European protocol form or road surface inspection report.
Classification of cracks as precursors of pits
Before a full-fledged hole appears on the road, it goes through a stage of crack formation. Cracks are breaks in the continuity of the coating, which are classified by direction, width and nature of formation. Ignoring these “signals” on the part of road services inevitably leads to the formation of potholes. The technical documentation identifies several main types of cracks.
First type - single cracks. They can be longitudinal (along the axis of the road) or transverse (perpendicular to the axis). Longitudinal ones often indicate poor sealing of seams or strip edges, while transverse ones indicate thermal stress or shrinkage of the base. The width of such cracks can vary from hairline to several centimeters.
Second type - mesh cracks, often called "alligator skin". This is a complex defect in which the coating surface is divided into individual polygons of irregular shape. The presence of a network of cracks indicates that the bearing capacity of the base has been exhausted, and repairs using a simple pitting method will no longer help here - a complete replacement of the layer is required.
Third type - blocked cracks. They are formed as a result of reflection of cracks from underlying layers (for example, from the joints of concrete slabs or old cracks). Such defects are typical for roads where restoration was carried out by laying new asphalt over the old one without proper preparation.
Particular attention should be paid to the width of the crack. If it exceeds 2 mm, it is considered open and requires immediate sealing. Otherwise, water easily penetrates into the deep layers of the road surface, eroding the crushed stone base. It is this process that turns a seemingly harmless crack into a deep pothole in one winter season.
Deformations of the road surface: heaving and sagging
Not all road defects are in the form of depressions. There are also types of damage that, on the contrary, create bulges on the surface. These include heaving, sagging and combing. These defects are also dangerous for the car, as they can lead to loss of control, especially at high speeds or in wet weather.
Heaving is a local rise of the road surface caused by an increase in the volume of base soils due to freezing of moisture or swelling of clay soils. Visually it looks like a bump, often with radial cracks at the top. Heaving is typical for areas with high groundwater levels and poor drainage systems.
Surges are formed when the coating material is displaced under the influence of horizontal loads from the wheels of braking or accelerating vehicles. They are most often found at intersections, public transport stops and steep climbs. Asphalt “collects” into shafts, creating irregularities that can damage the rims.
Another type of deformation is comb. This is a series of transverse wave-like elevations and depressions with a pitch of 50 to 150 mm. Cracking usually occurs on asphalt concrete pavements with excess bitumen or when laying the mixture at low temperatures. Driving on a ridge creates severe discomfort and vibration that is transmitted to the car body.
| Defect type | Cause of occurrence | Impact on the car | Elimination method |
|---|---|---|---|
| Pothole | Asphalt spalling, water | Damage to tires and wheels | Pothole repair |
| Drawdown | Base erosion, weak soils | Loss of control, hydroplaning | Leveling, replacing the base |
| Network of cracks | Depletion of bearing capacity | Accelerated suspension wear | Milling and overlay |
| Heaving | Freezing of moisture in the soil | Sharp impact, loss of contact | Drainage installation, soil replacement |
It is important to understand that the presence of deformations such as sagging or ridges is also grounds for requiring repairs. According to regulations, the depth or height of unevenness should not exceed 15 mm for speeds up to 60 km/h and 10 mm for higher speeds. Exceeding these values makes the road unsafe.
Effect of defects on suspension and wheels
For a car owner, the question of what potholes are called is closely related to the issue of car safety. Every encounter between a wheel and a road surface defect is a shock load on the elements. pendants. Shock absorbers, springs, silent blocks and ball joints experience enormous overloads, which can reduce their service life significantly.
The most vulnerable element when hitting a pothole is the wheel. A sharp impact on the edge of a hole can lead to the formation of a “hernia” on the sidewall of the tire, rupture of the cord, or even destruction of the wheel rim. Cast wheels, having less ductility compared to stamped ones, are prone to splitting under strong impacts.
Constantly driving on roads with a network of cracks and small potholes leads to accelerated wear of the wheel bearings. Vibration transmitted from uneven surfaces washes away the lubricant and causes premature failure of the bearing assembly. This, in turn, can lead to the wheel jamming while driving, which is an emergency situation.
To minimize damage when driving over bumps, try to release the brake just before the wheel hits the obstacle. A braked suspension absorbs impacts more harshly, which increases the load on the parts.
In addition to mechanical damage, poor coating affects the geometry of the body. Frequent strong impacts can lead to a violation of the wheel alignment angles (wheel alignment), which will cause uneven wear of the rubber and the car pulling to the side. Regular diagnostics of the chassis becomes mandatory for those who often drive on roads with defects.
Legal aspects and GOST standards
In Russia, the main document regulating the requirements for the operational condition of roads is GOST R 50597-2017 "Roads and streets. Requirements for operational condition acceptable under the conditions of ensuring road safety." It is this standard that determines the maximum size of defects at which the road is considered safe.
According to GOST, the maximum dimensions of individual potholes should not exceed: in length - 15 cm, in width - 60 cm, in depth - 5 cm. If at least one of these parameters is exceeded, the defect is considered dangerous and must be eliminated. In this case, fencing elements must be installed within 24 hours from the moment of discovery.
Standards have also been established for cracks. Total length of single cracks per 1000 sq. m of coverage should not exceed certain values depending on the category of the road. The presence of a network of cracks with an individual cell size less than 20 cm is also a violation of regulations requiring the intervention of road services.
⚠️ Attention: The time frame for eliminating defects depends on the category of the road and the type of damage. For potholes on category B roads (main highways), the repair period can be up to 5 days, but the barrier must appear immediately.
Knowledge of these standards is necessary not only for general development, but also for protecting your rights. If your car was damaged due to a hole whose dimensions exceed those allowed by GOST, you have every right to demand compensation for damage from the road balance holder. However, to do this, it is necessary to correctly record the violation.
Algorithm of actions in case of car damage
If you fall into a hole and damage your car, you need to act quickly and calmly. The first step is to stop in a safe place, turn on the hazard lights and put up a warning triangle. Under no circumstances leave the scene of the accident, as this will deprive you of the opportunity to record the link between the damage and a specific defect.
The second step is to call the traffic police. Only they have the right to draw up road accident diagrams and record the condition of the road surface officially. While the inspectors are driving, take your own photo and video recording: take a general plan of the scene of the incident, reference to the area (address signs, signs), a close-up of the pit itself with a ruler or tape measure for scale.
The third step is obtaining documents. After registration, you should be given a certificate of the accident and a protocol. These documents must clearly indicate that the cause of the accident was a defect in the road surface (pothole, break, etc.). Without this record, it will be almost impossible to prove the guilt of the road workers.
☑️ Checklist of actions when falling into a hole
The fourth step is assessing the damage and filing claims. You can contact your insurance company (if you have a CASCO policy or plan to use subrogation under MTPL) or directly file a lawsuit against the organization responsible for maintaining the road. In the latter case, an independent examination will be required to assess the cost of repairs.
Modern repair and prevention technologies
Road authorities today use a variety of defect repair methods, the effectiveness of which varies. Traditional pothole repair involves cutting down the edges of the pothole, treating it with bitumen emulsion and filling it with an asphalt concrete mixture, followed by compaction. This method is effective for single potholes, but often shrinks and requires repetition.
A more advanced method is jet-injection repair (technology Jetpatcher). A special machine cleans the pothole, heats it up, delivers bitumen emulsion and crushed stone under high pressure, and then compacts the material. This method allows you to work even in winter and ensures better sealing of the edges.
Technology is used to prevent the formation of cracks and subsidence geosynthetics. Laying geogrids or geotextiles between the layers of the roadway allows you to redistribute loads and prevent the reflection of cracks. This increases the service life of the road between repairs by 2-3 times, although it increases the cost of initial construction.
Why do holes appear again and again?
The frequent reappearance of potholes in the same place is due to a violation of the road “pie” technology. If the base is damaged or there is no drainage, replacing only the top layer of asphalt provides only a temporary effect. The water continues to erode the soil, and the new asphalt fails after the old one.
Materials based on polymers and modified bitumen are also gaining popularity. They have increased elasticity and adhesion, which allows them to better resist the formation of cracks due to temperature changes. However, the cost of such materials still limits their widespread use on regional roads.
Conclusion and conclusions
Road destruction is an inevitable process, the speed of which depends on the quality of construction, climatic conditions and traffic intensity. Knowing how potholes on the roads are correctly called (potholes, breaks, subsidence) allows the driver not only to competently communicate with housing and communal services, but also to better understand the condition of the vehicle.
Timely detection and elimination of defects at the crack stage allows you to save significant budget funds and preserve the health of motorists. For the driver, the main protection remains attentiveness, compliance with the speed limit and knowledge of your rights if you get into an unpleasant situation on the road.
Correct terminology (pothole, break, crack) is a key success factor when filing a claim with the highway department and receiving compensation for car repairs.
Remember that safe driving depends not only on piloting skills, but also on the quality of the infrastructure. Be vigilant, record violations and do not remain indifferent to the condition of the roads in your region.
How to measure the depth of a pothole without special tools?
For an approximate measurement, you can use a regular school ruler or tape measure. Lay the ruler flat across the pothole, overlapping the edges. Then lower the pencil or knitting needle vertically to the bottom of the hole and make a mark at the level of the ruler. After this, measure the distance from the tip of the pencil to the mark. For more accurate data in court, the use of a special probe or level is required.
Can I get compensation if the pit is not fenced?
Yes, the lack of guardrails and warning signs is an aggravating factor for the road service. This indicates a violation of road safety rules. In the report, be sure to indicate that the defect was not indicated, which could cause additional danger for other road users.
What is the validity period of GOST R 50597-2017?
This standard is the current national standard of the Russian Federation. It came into force on May 1, 2018 and replaced the previous version of GOST R 50597-93. All measurements and assessments of road conditions must be carried out in accordance with the current edition of this document.
What to do if the traffic police refuses to go to the scene?
Traffic police officers are required to go to the scene of accidents, even if they occurred due to road defects. If you receive a refusal, request that your call and refusal be recorded in the duty station log. You can also immediately call the police (102 or 112) and report that there is unattended dangerous cargo on the road (pieces of asphalt, reinforcement) that poses a threat, which will oblige the police to come out to check.