An Integrated Network of Roadside Sensors and Vehicles for Driving Safety: Concept, Design and Experiments

One major goal of the Vehicular Ad hoc NETwork (VANET) is to improve driving safety. However, the VANET may not guarantee timely detection of dangerous road conditions or maintain communication connectivity when the network density is low (e.g., in rural highways), which may pose as a big threat to driving safety. Towards addressing the problem, the authors propose to integrate the VANET with the inexpensive Wireless Sensor Network (WSN). That is, sensor nodes are deployed along the roadside to sense road conditions, and to buffer and deliver information about dangerous conditions to vehicles regardless of the density or connectivity of the VANET. Along with the concept of VANET-WSN integration, new challenges arise and should be addressed.