DGT Road Safety & Rules 3

Question 1

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

Accepted Answer

0.08%

Answer

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

Question 2

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

Accepted Answer

An all-way stop

Answer

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

Question 3

What is the purpose of rumble strips on highway shoulders?

Accepted Answer

Alert drowsy or distracted drivers they are leaving the travel lane

Answer

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

Question 4

At a roundabout, vehicles already in the circle have:

Accepted Answer

The right-of-way over entering traffic

Answer

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

Question 5

What does a flashing yellow traffic light mean?

Accepted Answer

Proceed with caution

Answer

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

(DGT) Directorate-General for Traffic Test Practice Test