What should be noted when a vehicle enters a tunnel?

[RyanDella]

The precautions for vehicles entering a tunnel are: 1. Carefully observe the height and width limit signs and instructions at the entrance. Vehicles that do not meet the requirements are strictly prohibited from entering the tunnel; 2. Carefully check for oncoming traffic and sound the horn appropriately or turn on the width indicator lights when passing through; 3. When entering a two-way tunnel, drive on the right side, turn on the lights, pay attention to oncoming vehicles, and avoid honking inside the tunnel; 4. Overtaking, reversing, turning around, and parking are not allowed in the tunnel. If the vehicle breaks down, turn on the width indicator lights and taillights, and try to move the vehicle outside the tunnel. A tunnel is an engineering structure buried in the ground, utilizing underground space.