This book introduces a solution to one of the society problems (monitoring of roads area coverage by vehicles for avoidance of traffic congestion) by using a camera. The main idea is to simulate the traffic policeman's actions in controlling the traffic light duration (timer) and the traffic pass permission (green light) through analyzing images sequences to determine the road occupation by vehicles (road density). The traffic duration is controlled according to the road density percentage; which is determined using an effective proposed metric for denasity calculation. The traffic pass...