Dedicated Short Range Communications (DSRC) is a short to medium range wireless communication technique specifically designed for automotive use, i.e. vehicle-to-vehicle and vehicle-to-infrastructure communication. Due to the short range of the signals, DSRC is particular useful to provide location based services. Today, the main application of DSRC is Electronic Toll Collection (ETC). In future, DSRC will also support safety critical communications such as collision avoidance and hazard warning. DSRC systems use infrared or the radio spectrum, particularly microwaves in the frequency bands 5.795-5.805 GHz and 5.805-5.815 GHz.