Acceleration Rate

 

A vehicle accelerates (or decelerates) in order to:

• react to the vehicles ahead (car-following);
• perform a lane changing or merging maneuver;
• respond to events (e.g. red signals and incidents); and
• achieve its desired speed.

The most constraining of these situations determines the acceleration (or deceleration) rate to be implemented.

• Car following
  • Free flowing regime:
  • Emergency regime:
  • Car-following regime:
• Merging
• Event Responding
  • Traffic signals and signs:
  • Incidents:
  • Connection to downstream link:
  • Courtesy yielding: