Traffic is moving steadily at 35 mph in a 55 mph zone. Under normal conditions, which speed is generally safest for your lightly loaded vehicle?
Correct answer: B – 35 mph
In heavy traffic, traveling at the speed of surrounding vehicles is generally safer when that speed is legal and appropriate for conditions. Driving significantly faster requires repeated passing and increases conflict with other vehicles. Maintain a safe following distance and never use traffic flow as a reason to exceed a lawful or safe speed.
Source: Utah Commercial Driver License Handbook, 2025 Edition — § 2.6.5, “Speed and Traffic Flow”





