What are the precautions when driving through a tunnel?

[McNoah]

For general two-lane tunnels on regular roads, you should drive at normal speed on the right side of the road when entering the tunnel. Do not change lanes inside the tunnel, and overtaking is strictly prohibited. Speed limit signs are usually prominently displayed at tunnel entrances, and reminders are also posted inside the tunnel. When approaching a tunnel, carefully observe traffic signs or information boards. Freight vehicles should pay special attention to height restrictions—overheight vehicles are strictly prohibited from entering the tunnel. Do not rely on intuition to judge your speed inside the tunnel; always confirm your speed using the speedometer and maintain a safe following distance. When driving through a two-way tunnel, stay on the right side of the road, turn on your lights as needed, and be cautious of oncoming vehicles. Honking is generally discouraged inside tunnels. Always maintain a safe distance when driving through a tunnel. Many tunnel accidents are caused by rear-end collisions due to insufficient following distance. Generally, keep a distance of at least 100 meters inside the tunnel to ensure enough space for evasive maneuvers and overall safety.

[MacFernando]

When driving through tunnels, I always feel the need to be extra cautious, especially after experiencing being stuck inside several times. First, it's essential to slow down before entering the tunnel—many places have clear speed limit signs, and speeding increases the risk of rear-end collisions. Additionally, headlights should be turned on in advance, even during the day—the dim lighting inside the tunnel makes it easier for others to spot you. Maintaining a safe distance is also crucial; leave at least an extra one or two seconds of following distance compared to normal driving, so you can react if the car ahead brakes suddenly. Never overtake or change lanes inside the tunnel—the roads are narrow, and surveillance cameras often catch violations. Tunnel surfaces can become slippery quickly when the weather changes, so I grip the steering wheel firmly to stabilize the car. During heavy fog or rain, pay extra attention to traffic signals, and if the car malfunctions, immediately pull over, turn on the hazard lights, and call for help. These habits have helped me avoid many troubles—safety always comes first when driving.

[VanRicardo]

When driving through tunnels, I usually follow a simple checklist to ensure a smooth journey. Turning on the headlights is essential to improve visibility, as the dim lighting inside tunnels can make it hard for vehicles behind to see clearly. It's best to reduce speed by 5-10 km/h below the limit to minimize accident risks. I prefer maintaining an extra half-car distance to prepare for sudden stops by the vehicle ahead. Lane changes and overtaking are prohibited inside tunnels, so strictly adhering to lane markings is a must—otherwise, it could cause traffic jams or fines. Before exiting, gradually adjust to the changing light conditions instead of rushing to accelerate out. On a side note, I often commute through urban tunnels during morning rush hour, and these details help save time and reduce friction. In case of emergencies, the safest move is to pull over and use the tunnel emergency phone for assistance.

[OPreston]

When driving through tunnels, safety is my top concern, especially with family onboard. Slowing down is the first step, as high speeds increase accident risks in enclosed spaces. Turning on headlights—automatically or manually—ensures visibility for both directions, a habit I've maintained since I started driving. Maintaining ample following distance guards against brake failure, as tunnel accidents are harder to rescue. No overtaking and staying in lane—simple yet critical rules. If signals malfunction or the road is slippery, just steady the steering wheel. Ease off acceleration briefly after exiting the tunnel.