Speed Profiles

Vehicle Speeds

The consultant should adjust vehicle speed based on the posted speed limit unless better data is available. When no speed data is available, the consultant should use the values in the template. 

Desired speed decision points should line up; otherwise, vehicles can change lanes between them and continue through the model without updating to the appropriate speed.

Reduced speed areas should generally be less than 30 feet in length, unless specifically observed otherwise. Of note, the Vissim algorithm to adjust speed for a vehicle passing through a reduced speed area already anticipates the slow down ahead of time, allowing for the vehicle to transition appropriately.