At traffic intersection, it is customarily for vehicles to move based on green lights and to stop, based on red lights. When the vehicles cross the stop line, and continue their drive after green light; it is quite possible that the traffic on the stretch of the road where these vehicles move into may be busy, full or over packed with vehicles. At such instances, even though the vehicles cross the stop line, they will not be able to drive into the other part of the road in which they are proceeding.

This will force the vehicles to queue up, resulting in blocking the intersection area. If such a thing happens and signal change for vehicles moving in other directions, a traffic jam would occur because of vehicles already queuing in the intersection area. This will result in other vehicles also getting stuck. This will result in ripple effect as one jam will lead to other traffic obstruction. This kind jam in traffic at intersections often chokes the traffic completely and for long hours in the cities.

Some traffic organizers have developed some new and innovative methods to defuse this kind of situations. Travelers to Dubai will notice a striking method on how the choking of traffic in intersections is averted. In this city even though there may be green light, vehicles travelling a lane cannot cross the stop line, unless the driver in the front is able to locate free driving space after crossing the intersection on the road he is supposed to drive into.

This is a remarkable practice worthy of appreciation. Because firstly it prevents the clogging of the intersection space, and secondly people moving in one set of direction will not get affected by traffic jam in the road leading to a different direction.