The Commercial Drivers License (CDL) Study Guide

Matching Speed to the Road Surface

speedcondt

You can’t steer or brake a vehicle unless you have traction. Traction is friction between the tires and the road. There are some road conditions that reduce traction and call for lower speeds.

Identifying Slippery Surfaces.

Hydroplaning.

Speed and Curves

Speed and Distance Ahead

Speed and Traffic Flow

Speed on Downgrades


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