Vehicle Delay

Vehicle delay is handled unusually in VISSIM. It's represented by the difference between a vehicle's speed and it's theoretically desired speed. The theoretical desired speed (vTheo) is different than the plain old desired speed (vdes) because a vehicle can't go 60 miles/hr when turning right at an intersection, therefore it shouldn't accumulate delay when performing that maneuver.

The trouble is that vTheo is not accessible from the COM interface, nor is delay, so to get real time delay you have to use vDes - v as a substitute.