Road Safety & Rules Flashcards

Which blood alcohol concentration (BAC) is the legal limit for non-commercial drivers 21 and older in most U.S. states?

Answer: 0.08%

The per se legal BAC limit for adult non-commercial drivers is 0.08% in most U.S. jurisdictions.

When a traffic signal is completely dark (no lights working), the intersection should be treated as:

Answer: An all-way stop

A non-functioning traffic signal requires all drivers to stop and treat the intersection as a four-way stop.

What is the purpose of rumble strips on highway shoulders?

Answer: Alert drowsy or distracted drivers they are leaving the travel lane

Rumble strips create noise and vibration that alert drivers when their vehicle drifts onto the shoulder.

At a roundabout, vehicles already in the circle have:

Answer: The right-of-way over entering traffic

Traffic inside a roundabout always has the right-of-way; entering drivers must yield before merging.

What does a flashing yellow traffic light mean?

Answer: Proceed with caution

A flashing yellow signal warns drivers to slow down and proceed through the intersection with caution.

How far from a fire hydrant must you park to keep access clear?

Answer: 15 feet

Federal and most state guidelines require parking at least 15 feet from a fire hydrant to ensure emergency access.

Which of the following statements about driving in work zones is correct?

Answer: Fines for traffic violations are typically doubled in work zones

Most states double fines for traffic violations in designated work zones to protect road workers.