1. 5. 1 Specific mobility model Nodes in the network suffer from a specific mobility model Although roads have speed limitation in both highways and urban scenarios the speed of vehicles is much faster than human activities The vehicles are driven by humans while the movement of vehicles is not purely random but depends on the plans of drivers and the fixed roads nature such as speed limitation signal light, traffic jam and so on1.5.1 Specific mobility model ◼ Nodes in the network suffer from a specific mobility model ◼ Although roads have speed limitation in both highways and urban scenarios, the speed of vehicles is much faster than human activities ◼ The vehicles are driven by humans, while the movement of vehicles is not purely random but depends on the plans of drivers and the fixed roads nature such as speed limitation, signal light, traffic jam, and so on