Negative average delay time

[Rubi Han]

I got a question about TRANSIMS and hope you can help me with it.

I opened the file named <10.Alex.LinkDelay> and found some of the average delay time is below zero.  My question is why does it exist and how to explain it?

[Roden, David]

Delay is calculated based on free flow speed and the Microsimulator uses maximum speed to modeling vehicle movements.  In many/most cases maximum speed is coded greater than free flow speeds so a vehicle on an uncongested facility can travel faster than free flow speed (hence a negative delay).  You can think of this as driving faster than the speed limit or negative traffic control delay.

 

David B. Roden, P.E.

Senior Consulting Manager

AECOM

2101 Wilson Boulevard

Suite 800

Arlington, VA  22201

david...@aecom.com

703-340-3069

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