The Commercial Drivers License (CDL) Study Guide

 

Speed and Traffic Flow

When you’re driving in heavy traffic, the safest speed is the speed of other vehicles. Vehicles going the same direction at the same speed are not likely to run into one another. Drive at the speed of the traffic, if you can without going at an illegal or unsafe speed. Keep a safe following distance. The main reason drivers exceed speed limits is to save time. But anyone trying to drive faster than the speed of traffic will not be able to save much time. The risks involved are not worth it. If you go faster than the speed of other traffic:

• You’ll have to keep passing other vehicles. This increases the chance of an accident.

• It is tiring. Fatigue increases the chance of an accident. Going with the flow of traffic is safer, and easier.

Speed on Downgrades


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