1.2.7.6: Provide Intersection Collision Avoidance Data

This process shall provide collision avoidance data to vehicles that are approaching intersections served by the Manage Traffic function. The process shall use the data available from traffic sensors to determine any vehicle position conflict(s) that will arise if no action is taken. This process shall output data giving the direction from which the potential collision hazard will arise to the vehicle(s) that is(are) likely to receive the impact. This process shall, where possible, provide controls to the intersection controller and other nearby traffic control devices to avoid or minimize a crash. This process supplies approaching vehicles with data about the geometry of the intersection. This process uses data from the signal control function and broadcasts the Signal Phase and Timing (SPaT) data including the current phase, time left in the current phase, what the next phase will be and the timing for the next phase, and optionally the timing for the phase after that (Next Next Phase, e.g. when the red after the yellow will be).

This process is associated with the ITS Roadway Equipment physical object.

This process is associated with the following functional objects:

• Roadway Mixed Use Crossing Safety

This process is associated with the following data flows:

• intersection_collision_data_for_warning
• intersection_personal_data_for_signage
• intersection_state_data
• local_sensor_data_for_intersection
• pedestrian_demand_for_intersection
• pedestrian_indicator_for_intersection