Outside the tunnel (as seen from the direction of travel), three-color traffic lights should be installed at the top of both sides of the tunnel (in the direction of the traffic lane).

Traffic lights should be installed on both sides of the tunnel wall at a height of 2.50 meters above the sidewalk.

They should be mounted on a universal fixed stirrup damper bracket so that the traffic lights can be adjusted on the horizontal and vertical axes. After the optimum position is determined, the mounts should be equipped with locking devices to prevent further movement.