Automated Real-Time Intelligent Traffic Control System for Smart Cities Using Wireless Sensor Networks

Figure 14

Data sent by sensor nodes. Crossroad ID is the identifier of the road crossing. Lane ID is the identifier of the road in the corresponding intersection. Lane direction ID is the identifier of the direction of the road (1 for incoming lanes at the crossing and 2 outgoing lanes). Sensor type is the identifier of the type of sensor (1: detection of parking spaces, 2: detection of traffic in the lane). Node ID is the node identifier. State is the state detected by the sensor (1: occupied, -0: free), and this field is filled in by the nodes which monitor road traffic. Parking space state is the state of parking space occupancy, and this field is filled in by the hybrid nodes which monitor the parking spaces in each lane. Car registration number is the registration number of the parked car captured by hybrid sensors thanks to the RFID reader.