Low power digital radios operates in ZigBee standard which is IEEE 802.15.4 in personal area network with low data rate. In zigbee_routing.tcl, Vehciular Ad Hoc network is created with MAC layer configuration as Mac/802_15_4 and with physical layer configuration as Phy/WirelessPhy/802_15_4. Road Side Sensors and Zigbee coordinators are configured to route the messages from vehicles.
set val(netif1) Phy/WirelessPhy/802_15_4 ;# network interface type
set val(mac) Mac/802_15_4 ;# MAC protocol