Sec. 1202.8. Specific tunnel regulations

(a) Changing of lanes.

Vehicles shall not change lanes in the tunnels unless so directed by a police officer or a traffic control device.

(b) Parking lights only.

Upon entering tunnels headlights shall be extinguished and parking lights only shall be used.

(c) Sounding horn, flashing lights.

Drivers of vehicles shall not sound their horns or flash their lights in the tunnels.

(d) Distance between vehicles.

In tunnels, a vehicle operating at a maximum speed of 35 miles per hour shall maintain a distance of at least 75 feet behind the vehicle immediately preceding it in the same lane; provided, however, that a bus or truck with passengers standing or occupying seats which are not permanent or fixed, operating at a maximum speed of 35 miles per hour shall maintain a distance of at least 150 feet behind the vehicle immediately preceding it in the same lane. A vehicle operating at a speed less than the prescribed maximum speed shall maintain a safe and prudent distance behind the vehicle immediately preceding it in the same lane.