You travel with your bus of more than 3 . 500 kg . of M . M . A through a tunnel and do not intend to overtake . What safety distance you must keep with the vehicle in front <3 >
At least 150 meters or a minimum interval of 6 seconds .
At least 50 meters and a distance that allows you to stop in the event of sudden braking .
At least 100 meters or a minimum interval of 4 seconds .