DGT Navigation & Route Planning 3 — Questions and Answers
Question 1: What does a dashed center line on a two-lane road indicate for navigation purposes?
- No overtaking is permitted in either direction
- Overtaking is permitted when it is safe to do so (Correct answer)
- The road is one-way
- The lane is reserved for bicycles
Correct answer: Overtaking is permitted when it is safe to do so
Dashed center lines indicate that passing is permitted when conditions are safe.
Question 2: When planning a route through a mountain pass in winter, a driver should primarily check:
- The scenic rating of the route
- Chain control requirements and road closure status (Correct answer)
- The number of fuel stations along the route
- The posted speed limits only
Correct answer: Chain control requirements and road closure status
Mountain passes may require tire chains or be closed in winter, making chain control checks essential.
Question 3: A vehicle's odometer reads 12,340 miles at the start of a trip. After 180 miles, what does the odometer read?
- 12,420
- 12,500
- 12,520 (Correct answer)
- 12,180
Correct answer: 12,520
12,340 + 180 = 12,520 miles on the odometer.
Question 4: What is the primary purpose of a 'rest area' sign on a highway?
- To indicate a toll booth ahead
- To inform drivers of a safe place to stop, rest, or use facilities (Correct answer)
- To mark a speed reduction zone
- To show the location of a gas station
Correct answer: To inform drivers of a safe place to stop, rest, or use facilities
Rest area signs guide fatigued drivers to designated stopping areas to rest safely.
Question 5: When a GPS shows an 'estimated time of arrival' (ETA), this estimate is based on:
- The maximum posted speed limits only
- Current traffic data and average travel speeds (Correct answer)
- The driver's historical driving speed
- Distance alone without accounting for traffic
Correct answer: Current traffic data and average travel speeds
Modern GPS systems calculate ETA using real-time traffic data and average travel speeds.
Question 6: You are driving on a divided highway and realize you missed your exit. You should:
- Reverse on the shoulder to the exit
- Cross the median to take the exit
- Continue to the next exit and turn around (Correct answer)
- Stop and wait for assistance
Correct answer: Continue to the next exit and turn around
Reversing or crossing medians on divided highways is illegal and extremely dangerous; use the next exit.
Question 7: A green arrow on a freeway overhead sign indicates:
- A lane that is closed ahead
- A lane that is open and available for use (Correct answer)
- A lane reserved for HOV vehicles only
- A lane with a reduced speed limit
Correct answer: A lane that is open and available for use
Green arrows on variable message signs indicate lanes that are open to traffic.
DGT Navigation & Route Planning 3
What does a dashed center line on a two-lane road indicate for navigation purposes?