When the Burning Man ends, and the mass exodus out of Black Rock City begins, a road traffic control procedure called "Pulsing" is used to direct vehicles out of the city. At regular intervals (usually an hour during the peak periods), all vehicles are "pulsed" forward all at once for about a mile along Gate Road. This allows vehicles to stop and turn off their engines, while those at southernmost mile of the multi-lane Gate Road slowly merge and then turn onto the two-lane Highway 34.