Traffic Laws & Regulations Flashcards
7 cards from real CDT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Traffic Laws & Regulations flashcards as text
A driver trainer is explaining right-of-way rules at a four-way stop. When two vehicles arrive simultaneously from opposite directions, and one plans to go straight while the other turns left, who must yield?
Answer: The vehicle turning left must yield to the vehicle going straight
A left-turning vehicle must always yield to oncoming traffic proceeding straight through an intersection.
Under the Uniform Vehicle Code, what is the minimum following distance rule for commercial vehicles over 10,000 lbs GVWR traveling at highway speeds?
Answer: At least 300 feet behind another motor truck or bus
The UVC requires motor trucks and buses to maintain at least 300 feet of following distance from other trucks and buses when traveling on open highways.
Which of the following describes the correct procedure for a CDL driver approaching a railroad grade crossing with no active signals or gates?
Answer: Slow down, look and listen in both directions, and cross only when safe
At passive (uncontrolled) grade crossings, drivers must slow, look both ways, and only cross when certain no train is approaching.
Under FMCSA regulations (49 CFR Part 392), a CMV driver is prohibited from driving when ill or fatigued to a degree that it might endanger safety. This rule is commonly called:
Answer: Operating a CMV while ill or fatigued prohibition
49 CFR 392.3 specifically prohibits CMV drivers from operating when their condition — illness, fatigue, or impairment — could endanger themselves or others.
When teaching a student about highway entrance ramps, a CDT instructor should emphasize that the primary goal of acceleration lanes is to allow the driver to:
Answer: Adjust speed to match highway traffic before merging
Acceleration lanes give entering drivers space to reach highway speed so they can merge smoothly with faster moving traffic.
A student driver makes a U-turn on a state highway where U-turns are prohibited. Which legal category does this violation most likely fall under?
Answer: A moving traffic violation
A prohibited U-turn is a moving traffic violation because it involves an unlawful maneuver made while the vehicle is in motion.
Under most state laws, when must a driver use headlights in addition to darkness hours?
Answer: When visibility is reduced to less than 1,000 feet due to weather conditions
Most states require headlights whenever visibility drops below 1,000 feet (some states use 500 feet), which includes rain, fog, and smoke conditions.