Home > Architecture > Physical Architecture > Architecture Flows >

local signal preemption request (Architecture Flow*)

Direct control signal or message to a signalized intersection that results in preemption of the current control plan and grants right-of-way to the requesting vehicle.

Emergency Vehicle Roadway

This Architecture Flow is in the following Service Packages:

• Emergency Routing

This Architecture Flow is in the following Equipment Packages:

• On-board EV En Route Support
• Roadway Signal Preemption

Data Flows*:

• emergency_vehicle_preemptions

Security Considerations:

• System Control

Standard* Activities:

• DSRC 5GHz: Dedicated Short Range Communication at 5.9 GHz Standards Group
• DSRC 915MHz: Dedicated Short Range Communication at 915 MHz Standards Group
• NTCIP 1201: Global Object Definitions
• NTCIP 1211: Object Definitions for Signal Control and Prioritization (SCP)