Wireless Sensor Networks are the source of intelligent systems today. With the development of sensor nodes that form Wireless Sensor Networks, these systems can be easily used in our daily life. In this study, intelligent transportation systems and traffic management with Wireless Sensor Networks are described. Within the scope of intelligent transportation systems, vehicle sensors, road sensors, weather sensors and environmental sensors are mentioned. Within the scope of Traffic Management, dynamic signalization systems are mentioned. It is estimated that the work done will be beneficial to readers and practitioners.