DTT Speed and Stopping Distances 2 — Questions and Answers
Question 1: What is the speed limit on a regional road in Ireland when no other limit is displayed?
- 60 km/h
- 80 km/h (Correct answer)
- 100 km/h
- 50 km/h
Correct answer: 80 km/h
The default speed limit on regional roads (R roads) in Ireland is 80 km/h when no other limit is posted.
Question 2: What is the speed limit for a learner driver (driving with an 'L' plate) on a motorway in Ireland?
- 100 km/h
- 80 km/h
- Learner drivers are not permitted on motorways (Correct answer)
- 120 km/h
Correct answer: Learner drivers are not permitted on motorways
Learner drivers are not permitted to drive on motorways in Ireland under any circumstances.
Question 3: How does carrying a heavy load affect a vehicle's stopping distance?
- It has no effect on stopping distance
- It decreases stopping distance
- It increases stopping distance (Correct answer)
- It only affects handling, not stopping distance
Correct answer: It increases stopping distance
A heavier vehicle has more momentum, which increases the braking distance needed to stop safely.
Question 4: What is the safe following distance rule often used in Ireland to maintain adequate stopping distance?
- One car length for every 10 km/h
- The two-second rule (Correct answer)
- Stay 50 metres behind at all times
- Match the speed of the car ahead
Correct answer: The two-second rule
The two-second rule means leaving at least a two-second gap between your vehicle and the one ahead, giving you time to react and brake.
Question 5: How does driver fatigue affect stopping distance?
- It reduces stopping distance
- It has no effect
- It increases stopping distance by lengthening reaction time (Correct answer)
- It only affects steering, not braking
Correct answer: It increases stopping distance by lengthening reaction time
Fatigue slows a driver's reaction time, increasing the reaction distance component of overall stopping distance.
Question 6: On an icy road, stopping distances can increase by how much compared to a dry road?
- Two times
- Five times
- Up to ten times (Correct answer)
- No change if driving carefully
Correct answer: Up to ten times
On ice, stopping distances can increase by up to ten times compared to a dry road due to severely reduced tyre grip.
Question 7: What is the speed limit for cars on a local road in Ireland where no signs are posted?
- 60 km/h
- 100 km/h
- 50 km/h
- 80 km/h (Correct answer)
Correct answer: 80 km/h
The default speed limit on local roads (L roads) in Ireland is 80 km/h when no other limit is displayed.
DTT Speed and Stopping Distances 2
What is the speed limit on a regional road in Ireland when no other limit is displayed?