Subway car "Oka" — one of the most modern solutions for urban transport in Russia, developed taking into account the latest requirements for comfort, safety and energy efficiency. These cars, produced OJSC "Metrovagonmash", have been actively used in the Moscow metro since 2020, replacing outdated models. But what's behind their futuristic design? How is the cabin arranged, what systems ensure smooth operation, and what should passengers pay attention to?
In this article we will analyze in detail internal structure of the Oka car: from the ergonomics of seats to equipment layouts, from ventilation systems to emergency mechanisms. You will find out why these cars are considered one of the quietest and most reliable, as well as which technical innovation make them unique against the background of foreign analogues.
We will pay special attention practical aspects: how to behave in case of emergency situations, which areas of the car are the safest, and how to recognize signs of malfunctions. The information will be useful not only to passengers, but also to specialists involved in servicing rolling stock.
1. General layout of the cabin: zones and their purpose
Car "Oka" has open plan salon without partitions between sections, which ensures free movement of passengers even during peak hours. The length of one carriage is 19.6 meters, and the width is 2.7 meters, which allows you to place up to 280 people (of which 60 are seats). The distribution of space is thought out taking into account passenger flows:
In the head parts of the car there are driver's cabin, separated from the salon by transparent partitions with doors. Here are emergency control panels and communication systems. The central part is reserved for seats and aisles, and in the tail sections are installed information boards and climate control equipment.
Feature "Okie" — asymmetrical door arrangement: on the right side in the direction of travel there are 4, on the left - 3. This solution is optimized for stations with different platform configurations. For example, on Circle line In the Moscow metro, this scheme reduces boarding/disembarking time by 15–20%.
- 🚪 Doorways: 1.4 m wide, equipped with obstacle sensors and light indication of opening/closing.
- 🪑 Seats: made of anti-vandal plastic with an ergonomic shape, attached to the floor without bolts (for quick replacement).
- 📢 Information panels: LED displays with information about the route, time and temperature in the cabin.
- 🚨 Emergency buttons: located at each doorway and in the driver’s cab.
A unique feature of the Oka: an automatic passenger counting (APC) system built into the door sensors. It transmits data to the dispatch center to optimize traffic schedules.
2. Materials and design: why Oka is quieter and more durable
The car body is made of aluminum alloy 6082, which is 30% lighter than steel with comparable strength. This reduces power consumption by 12–15% and reduces driving noise. For comparison: old cars of the series 81-717 weighed 5 tons more with the same capacity.
The interior decoration is made of composite materials with antibacterial coating (BioCote®), which inhibits microbial growth by 99.9%. The floors are covered rubber linoleum with anti-slip pattern, and the walls are lined perforated panels to improve acoustics.
Car windows - three-layer with tinting, which reduces interior heating in summer. Their area has been increased by 20% compared to previous models, which improves illumination and reduces claustrophobia for passengers.
⚠️ Attention: In severe frosts (below –25°C), tinted windows may become covered with condensation. This is not a defect, but a design feature - the glass heating system turns on automatically when the temperature drops.
| Material/Element | Characteristics | Advantage |
|---|---|---|
| Aluminum alloy 6082 | Sheet thickness: 4–6 mm | 30% weight reduction, corrosion resistance |
| Composite panels | With antibacterial coating | Hygiene, easy care |
| Rubber linoleum | Thickness 4 mm, corrugated surface | Anti-slip, silent |
| Three-layer glass | Tinting 35%, UV protection | Thermal insulation, sun protection |
If you notice a crack or peeling of a panel in the cabin, report it to the station duty officer. Oka cars use a modular fastening system—a damaged element can be replaced in 10–15 minutes without stopping traffic.
3. Ventilation and climate control systems: how comfort is maintained
In the carriages "Oka" installed dual-circuit climate control system, which automatically adjusts the temperature within the range 18–24°C depending on how busy the cabin is. Main components:
- 🌬️ Supply ventilation: air intake is carried out through filters HEPA H13, retaining 99.95% of particles (including viruses and pollen).
- ❄️ Air conditioners: 30 kW power, with recirculation function to save energy.
- 🔥 Heaters: electric heating elements in the floor and ceiling infrared panels.
- 📊 CO₂ sensors: when the concentration of carbon dioxide is exceeded (more than 800 ppm), enhanced ventilation is activated.
In winter, the system heats the air coming from the street to +10°C before supplying it to the cabin. In summer, air conditioners operate at EcoCool, lowering the temperature gradually to avoid colds among passengers.
Filters are cleaned every 3 months, and their replacement is once a year. Passengers can check the status of the system using the indicator on the information board: green means normal operation, yellow means maintenance is required, and red means a malfunction.
⚠️ Attention: If there is a burning smell or smoke in the cabin, immediately press the emergency button at the door. Oka cars are equipped with smoke detectors, but they are triggered when the smoke concentration is above 10% - in the early stages of a fire, passengers may notice the danger before the automation.
How does the recirculation system work?
In recirculation mode, air is taken from the cabin, passes through filters and cooled/heated without mixing with outside air. This reduces energy consumption by 25%, but only turns on when the car is low (less than 50 passengers).
4. Lighting and information systems: what passengers see
Inside "Oka" used multi-level lighting system:
- Basics: LED panels Philips LED with a color temperature of 4000K (neutral white), located on the ceiling.
- Emergency: rechargeable lamps that automatically turn on when the power is turned off (work up to 1 hour).
- Decorative: RGB doorways lighting, changing color depending on the driving mode (green - normal, red - accident).
Information boards display:
- Current and next stations.
- Travel time and delays (if any).
- Temperature in the cabin and outside.
- Messages from the dispatcher (for example, about transfers or repair work).
For visually impaired passengers there are tactile indicators on the handrails and voice alerts about the stations. The volume level of the speakers is adjusted automatically depending on the noise in the cabin.
Look at the information board (for any messages about delays)
Make sure the emergency buttons are not blocked
Check the lighting operation (there are no flashing lights)
Pay attention to the cleanliness of the floor (a wet floor can be dangerous) -->
5. Security systems: what protects passengers
Cars "Oka" equipped multi-channel security system, corresponding to the standard GOST R 57675-2017. Key elements:
- 🚨 Fire alarm: smoke, temperature and flame sensors with response time less than 5 seconds.
- 🔋 Emergency power: batteries with a capacity of 120 Ah, providing lighting and communications for 1.5 hours.
- 📡 Emergency communication system: buttons to call the driver and direct communication with the dispatcher.
- 🛡️ Anti-vandal protection: CCTV cameras with 1080p resolution and 72-hour archiving.
In case of emergency braking, they activate inertial belts on the seats (similar to airplanes), and the handrails have shock-absorbing inserts to prevent injury. All doors are locked when driving at a speed of more than 5 km/h.
Oka cars are the first in Russia certified for the evacuation of passengers through inter-car passages. If you stop in a tunnel, you can move to the next car without exiting the track.
The safest areas in the Oka car are the central part of the cabin and the places near the inter-car passages. Avoid standing near the doors while driving: in case of emergency braking, the risk of falling is 3 times higher.
6. Maintenance: how cars are checked
Cars "Oka" pass daily inspection before going on line, which includes:
- Checking the brake system and chassis.
- Testing of doors and emergency mechanisms.
- Monitoring the operation of climate systems and lighting.
Every 30,000 km (about once a month) is held average renovation:
- Replacement of ventilation filters.
- Diagnostics of electronics and batteries.
- Lubrication of door mechanisms and trolleys.
Major repairs are carried out once every 5 years or after 1 million km. It includes complete disassembly of the car, replacement of worn parts and modernization of systems (for example, updating the on-board computer software).
⚠️ Attention: If you notice a malfunction in the car (for example, a door that won’t close or a flashing light), notify the driver via the communication button. In 80% of cases, minor breakdowns are repaired directly on the line without sending the car to the depot.
| Type of service | Frequency | What is being checked |
|---|---|---|
| Daily inspection | Before each flight | Brakes, doors, lighting |
| Medium renovation | Every 30,000 km | Filters, batteries, electronics |
| Major renovation | Once every 5 years | Complete disassembly, replacement of parts |
7. Frequent malfunctions and how to recognize them
Despite the high reliability, in the cars "Oka" Sometimes typical problems arise:
- 🔊 Doors creaking: caused by wear of the roller mechanisms. Eliminates with lubricant.
- 💨 Weak air conditioner airflow: most often associated with clogged filters.
- 🔄 Flashing Light: a sign of unstable mains voltage or a faulty power supply.
- 🚪 Doors won't close: May be caused by foreign object or sensor failure.
If you encounter a problem, don't try to fix it yourself — all car systems are under high voltage (up to 1500 V). Report the problem to the driver or station attendant, indicating:
- Car number (written on the wall near the door).
- Nature of the malfunction (noise, smell, visual signs).
- Time and place of detection (station or stage).
In most cases, the car is sent to a technical station for diagnostics. If the malfunction is critical (for example, brake failure), the train is taken out of service immediately.
What to do if the carriage stops in the tunnel?
1. Stay calm - Oka cars are equipped with emergency ventilation and communications.
2. Do not try to open the doors yourself (they are blocked when moving).
3. Follow the driver's instructions or voice announcements.
4. In case of evacuation, use inter-car passages.
FAQ: Answers to frequently asked questions
Is it possible to transport large luggage in Oka cars?
Yes, but with restrictions. The baggage size should not exceed 120x60x40 cm and weight - 20 kg. Large items (such as bicycles) are only allowed in the last car of the train, as long as they do not block the aisles. During peak hours (7:00–10:00 and 17:00–20:00) the transportation of oversized luggage is prohibited.
Why do you sometimes smell ozone in Oka cars?
This is a normal work-related occurrence. air ionizers, built into the ventilation system. They generate negatively charged ions that neutralize bacteria and unpleasant odors. The smell of ozone is weak and harmless, but if it becomes strong, notify the operator as this may indicate a faulty equipment.
How can you find out which car is part of the Oka and which is the old model?
Oka cars can be easily distinguished by the following features:
- Futuristic front design with LED headlights.
- Wide doorways (1.4 m versus 1.2 m for old cars).
- Digital information boards instead of paper signs.
- Lack of partitions between sections of the cabin.
Also on the Oka cars there are markings 81-775/776/777 on the end walls.
What to do if the door of the Oka train is jammed?
Do not try to open it by force - this may damage the mechanism. Press the emergency button at the door (indicated by a red circle) or contact the driver via the call button. If the door is stuck open, wait until the train stops at the station—trying to close it manually may block the safety sensors.
Why does Wi-Fi sometimes turn off in Oka cars?
The wireless Internet system in the metro operates through repeating stations installed on the platforms. In tunnels between stations, communication may be interrupted due to signal shielding. Oka cars use an amplified antenna, but even this does not guarantee 100% coverage. If Wi-Fi drops frequently, try reconnecting to the network MOSMETRO_FREE or use mobile Internet (4G is available in the tunnels of some lines).