Vehicular Ad-hoc NETworks systems (VANETs) are know-how that advantages moving vehicles as nodes in a mesh to conceive a mobile network. VANET turns every taking part vehicle into a wireless router, allowing vehicles of each other to attach and conceive a network with a very wide kind. VANETs are developed for enhancing the driving security and solace of automotive users. The VANETs can supply broad kind of services such as Intelligent Transport System (ITS) e.g. security submissions. Numerous of security applications constructed in VANETs are needed real-time attachment with high reliability. One of the major trials is to bypass degradation of communication passages in dense traffic network.