Abstract: A device for road and urban mobility and for solving the problem of traffic congestion, installed on a vehicle in order to make traffic flow more fluid in and between cities. The device consists of a set of five electronic modules, including a processor. The processor analyzes and extracts positional data of the equipped vehicle from a satellite signal and sends the requests of same for an exchange with a server, bi-directionally. The device is incorporated into an onboard housing. The present device is intended, in particular, to make the traffic flow more fluid and to communicate with a dedicated server in order to guide the driver of the equipped vehicle during his/her journey from a start point to the point entered into the device as the desired final destination. The present device reduces traffic congestion and pollution caused by greenhouse gas emissions.