: Unlike direct radio, which is limited by line-of-sight and distance, network-based SPaT can reach vehicles much further away, allowing for earlier planning.
: It integrates traffic signal controllers with central management systems to broadcast data across entire corridors or urban networks. Key Benefits & Applications Signal Phase and Timing (SPaT) Message SPAT over the network
Traditionally, SPaT messages were broadcast via , which requires a vehicle to be within a few hundred meters of a physical roadside unit (RSU). SPaT over the network leverages existing 4G/LTE or 5G cellular infrastructure (C-V2X) and cloud platforms to deliver this data. : Unlike direct radio, which is limited by
: Provides current signal states (red, yellow, green) and the residual time remaining for each phase. : Unlike direct radio