CDT Traffic Laws & Road Safety Rules 3 — Questions and Answers
Question 1: Which sign shape in the US is exclusively used for STOP signs?
- Triangle
- Diamond
- Pentagon
- Octagon (Correct answer)
Correct answer: Octagon
The octagon (8-sided) shape is reserved exclusively for STOP signs under the MUTCD.
Question 2: A CDT candidate is teaching right-of-way at a four-way stop. All four vehicles arrive simultaneously. Which vehicle proceeds first?
- The vehicle traveling straight
- The largest vehicle
- The vehicle to the right of all others (Correct answer)
- The vehicle that signals first
Correct answer: The vehicle to the right of all others
When vehicles arrive simultaneously at a four-way stop, the vehicle to the right of the other has the right of way.
Question 3: Under FMCSA regulations, what is the maximum driving time in a 14-hour on-duty window for a property-carrying CMV driver?
- 10 hours
- 11 hours (Correct answer)
- 12 hours
- 14 hours
Correct answer: 11 hours
Property-carrying CMV drivers may drive a maximum of 11 hours within a 14-hour on-duty window after 10 consecutive hours off duty.
Question 4: What does a flashing yellow traffic signal require of a driver?
- Stop and wait for a green signal
- Yield and proceed with caution (Correct answer)
- Treat it as an all-way stop
- Accelerate to clear the intersection quickly
Correct answer: Yield and proceed with caution
A flashing yellow signal means slow down, yield to crossing traffic or pedestrians, and proceed with caution.
Question 5: According to MUTCD standards, what color is used for warning signs in the United States?
- Orange
- Red
- Yellow (Correct answer)
- White
Correct answer: Yellow
Standard warning signs in the US use a yellow background with black text or symbols per MUTCD specifications.
Question 6: A driver training instructor is covering implied consent laws. What does implied consent mean?
- A driver consents to search of their vehicle upon request
- By driving on public roads, a driver agrees to chemical BAC testing if lawfully requested (Correct answer)
- A passenger implies consent to the driver's behavior
- A driver may refuse a field sobriety test without penalty
Correct answer: By driving on public roads, a driver agrees to chemical BAC testing if lawfully requested
Implied consent laws mean that by operating a vehicle on public roads, drivers automatically consent to chemical testing if a law enforcement officer has probable cause.
Question 7: What is the primary purpose of a dedicated right-turn lane marked with a solid white line and arrow?
- To allow free right turns without stopping
- To separate right-turning traffic from through traffic for safety (Correct answer)
- To permit U-turns only
- To indicate a bike lane merging with traffic
Correct answer: To separate right-turning traffic from through traffic for safety
Dedicated right-turn lanes separate turning vehicles from through traffic to reduce conflict points and improve intersection efficiency.
CDT Traffic Laws & Road Safety Rules 3
Which sign shape in the US is exclusively used for STOP signs?