Buses of categories M2 and M3 are permitted to operate only in strict compliance with a set of technical and legal standards prescribed in traffic rules and relevant GOSTs. The driver and owner of the vehicle bear full responsibility for ensuring that the vehicle complies with safety requirements before each trip to the line.
The basic rules for admission to traffic concern the serviceability of vital systems: the brake mechanism, steering and external lighting devices. Any deviation from the norm, be it a broken headlight or a crack in the windshield, is a legal basis for prohibiting operation.
Next, we will examine in detail under what conditions buses are allowed to operate, what documents are required to be in the cabin and how often it is necessary to undergo a technical inspection to maintain the vehicle in working condition.
Definition of categories M2 and M3 in the context of admission
Before talking about prohibitions, it is necessary to clearly understand which vehicles are subject to regulation. Category M2 includes buses with more than eight seats, in addition to the driver's seat, and a maximum weight of not more than 5 tons. These are, as a rule, small-class city minibuses or service delivery vehicles.
Category M3 covers heavier equipment: buses with more than eight seats and a maximum weight of over 5 tons. This includes intercity liners, city buses and tourist buses. It is for these two categories that the most stringent safety requirements exist.
It is important to note that buses are allowed to operate only if their actual weight and number of seats correspond to the data specified in the STS. Illegal modification of the interior, leading to a change in category, automatically deprives the car of the right to travel.
Owners often confuse these categories with passenger vehicles, but legislation requires a different approach to maintenance. Technical condition buses are checked more thoroughly, and the list of faults for which movement is prohibited is much wider.
- 🚌 Category M2 - transport for transporting passengers weighing up to 5 tons.
- 🚌 Category M3 - heavy buses weighing over 5 tons.
- 🚌 Both categories require a tachograph and GLONASS system.
Requirements for the braking system and steering
The most critical component on which the lives of passengers depend is the braking system. It is prohibited to operate buses of categories M2 and M3 if the effectiveness of the brakes does not comply with GOST standards. This applies to both the service and parking brakes.
The steering should be easy to turn and free of play. The presence of free play of the steering wheel in excess of the established values (usually no more than 10 degrees for buses) is a direct path to a ban on operation and fines.
⚠️ Attention: Driving a bus with a faulty brake system or steering is strictly prohibited, even to the repair site!
Checking the airtightness of the pneumatic brake drive must be carried out daily. Air leakage is not allowed, as this can lead to brake failure at the most inopportune moment. The pressure in the system must rise to operating values within a strictly allotted time.
Particular attention should be paid ABS (anti-lock braking system). For buses of categories M2 and M3 produced in recent years, the serviceability of ABS is a mandatory condition for admission. The fault light on the panel is on - you can’t drive.
Every day before leaving, check the operation of the parking brake on a slope: the bus must be held securely even with a slight inclination of the road.
External lighting and glazing
During daylight hours, buses are required to drive with daytime running lights or low beam headlights on. At night or in conditions of poor visibility, the serviceability of all external lighting devices is required: headlights, side lights, turn signals and brake lights.
The bus glazing must be transparent and free of damage that limits visibility. Cracks in the windshield in the wiper operating area above the half of the glass adjacent to zone 3 are grounds for prohibiting operation. For side windows, the requirements are a little softer, but deep chips are also unacceptable.
Windshield wipers and washers must work properly. In rain or snow, non-working windshield wipers make bus movement dangerous. The number and location of brushes must correspond to the design approved by the manufacturer.
Window tinting is a separate issue. For M2 and M3 buses, the light transmission of the windshield must be at least 70%, and the glass of the front doors must be at least 70%. Rear windows can be tinted, but only if exterior mirrors are installed on the sides to provide visibility.
| Device type | Requirement | Consequence of malfunction |
|---|---|---|
| Low beam headlights | Both must burn | Prohibition of operation |
| Brake lights | Both are working | Prohibition of operation |
| Turn signals | Flashing at a frequency of 1.5-3 Hz | Prohibition of operation |
| Tail light | White light, does not blink | Prohibition of operation |
Body, interior and emergency exits
The bus body should not have sharp protruding parts that could injure people. All doors, including emergency ones, must open freely. Opening mechanisms must operate both from the inside and outside (if provided for by the design).
The interior must have handrails, seats and ventilation systems in good working order. For categories M2 and M3, the presence of serviceable escape hatches and windows is critical. They must be marked with appropriate signs and instructions for opening.
The floor in the cabin must be level, without deep holes and holes, as well as slippery areas. Seat fastenings must be secure. Any tear-off seat in motion is a potential injury for dozens of passengers.
⚠️ Attention: Emergency exits blocked or cluttered with luggage are considered the same as their absence and will result in strict sanctions.
Heating the cabin in the cold season is not just comfort, but a safety requirement to prevent glass fogging and frostbite for passengers. Operating a bus with a non-working heater in winter may be regarded as a violation of transportation rules.
Mandatory equipment and documents
To legally operate M2 and M3 buses, you must have a full set of documents and equipment. First of all, this is a waybill with notes on pre-trip control. Without a valid waybill signed by a medical worker and a mechanic, departure is prohibited.
On board must be: a first aid kit of the established type, fire extinguishers (at least two, with a valid expiration date), warning triangles and wheel chocks (“boots”). The number of fire extinguishers depends on the length of the bus and the number of seats.
Modern requirements dictate the presence of a working tachograph with an installed CIPF unit and a valid driver card. The GLONASS system is also required, transmitting data on the location and speed of the vehicle to the dispatch center.
Necessary documents on the way:1. Driving license category D.
2. Vehicle registration certificate.
3. Waybill with marks.
4. OSAGO policy.
5. License for transportation (if required).
The absence of any of these elements makes the exploitation illegal. Inspectors from the State Traffic Safety Inspectorate and Rostransnadzor check the availability and validity period of equipment first.
Security systems and tachograph control
A tachograph is a “black box” of a bus that controls the driver’s work and rest schedule. The bus may only be operated if the tachograph is calibrated and sealed. Interfering with its operation or using “magnets” to block it leads to huge fines and withdrawal of rights.
The work and rest schedule is strictly regulated. The driver has no right to drive for more than 9 hours a day (with the possibility of extension to 10 hours twice a week). After 4.5 hours of control, a break of at least 45 minutes is required.
Violation of these rules is recorded automatically. Data from the tachograph can be read by the inspector at any time. If violations are visible on the driver’s card or in the device’s memory, punishment will follow.
Fines for tachograph
Fines for the absence of a tachograph or violation of labor regulations can reach 50,000 rubles for a driver and 300,000 rubles for a legal entity.
Safety systems also include seat belts. In buses of categories M2 and M3, where they are structurally provided, belts must be in good working order in all passenger seats. The driver is obliged to require passengers to buckle up if the bus is moving on the highway.
Frequency of technical inspection
Buses used for regular passenger transportation are subject to technical inspection every 6 months. This requirement is relevant regardless of the year of manufacture of the vehicle. Missing maintenance deadlines automatically prohibits operation.
For buses not engaged in regular transportation (for example, corporate transport), the frequency may vary, but is usually also 6 or 12 months depending on the age of the vehicle. However, for the M2 and M3 categories in commerce, the “six months” rule is ironclad.
The inspection procedure includes checking all of the above systems: brakes, steering, lights, ecology (exhaust gases). Only after receiving a diagnostic card with a positive conclusion can you apply for an MTPL policy and go to the line.
- 🛠️ Regular transportation - maintenance every 6 months.
- 🛠️ The age of the bus does not affect the frequency of checks for commerce.
- 🛠️ The diagnostic card must always be in original or electronic form.
Timely maintenance is not about bureaucracy, but a guarantee that the complex mechanisms of the bus have been checked by professionals.
Frequently asked questions about bus operation
Is it possible to operate an M2 bus with a non-working tachograph to the repair site?
No, driving with a faulty tachograph is prohibited. In this case, it is necessary to call a tow truck or repair team to the site. The only exception is that if a malfunction occurs on the way, then you can get to the place of parking or repair, but this must be recorded in the waybill indicating the time and reason.
What is the minimum tire tread allowed for M3 category buses?
For buses of category M3 (as well as for trucks), the minimum remaining tread depth is 2 mm. This is higher than that of passenger cars (1.6 mm), which is due to the greater weight and responsibility of the vehicle.
Is it permissible to operate a bus with a cracked side mirror?
If the crack does not interfere with the view and the mirror is held firmly, the operation can be formally prohibited only if the view is impaired. However, if the mirror is completely broken or missing, movement is prohibited. It is recommended to replace the damaged element before leaving.
Do I need to carry a transport license on the bus?
Yes, if the bus is used for commercial passenger transport, a copy of the license or extract from the registry must be carried in the vehicle. Failure to obtain a license during inspection will result in a fine and impoundment of the vehicle.