Survey of Traffic Congestion Detection using VANET

Traffic congestion is a major problem in modern societies where around the world millions of hours and gallons of fuel are wasted everyday by vehicles stuck in traffic. Traffic congestion estimation using vehicular ad hoc networks can have many interesting applications. This survey summarizes the research on traffic information systems based on vehicular ad hoc networks. Two classes of such systems are studied: Infrastructureless solutions based on inter-vehicle communication and infrastructure-based solutions. Systems within Infrastructureless class are briefly introduced and their strengths and weaknesses