BTT Speed Limits and Zones 2 — Questions and Answers
Question 1: On a wet road, how does your braking distance change compared to a dry road?
- It stays the same
- It can double (Correct answer)
- It decreases because tyres grip better
- It increases by about 10%
Correct answer: It can double
On a wet road, braking distance can approximately double because of reduced tyre grip. You should increase your following distance accordingly.
Question 2: What speed should you drive at in a car park?
- The road speed limit applies
- No more than 15-25 km/h (Correct answer)
- Whatever feels safe
- The posted car park limit or 40 km/h
Correct answer: No more than 15-25 km/h
In car parks, a very low speed of 15-25 km/h is appropriate due to pedestrians, reversing vehicles, and limited visibility.
Question 3: What is the speed limit for vehicles towing a trailer on an expressway?
- 90 km/h — same as other vehicles
- 60 km/h (Correct answer)
- 80 km/h
- 50 km/h
Correct answer: 60 km/h
Vehicles towing trailers have a lower speed limit of 60 km/h on expressways due to the increased stopping distance and reduced manoeuvrability.
Question 4: What is the 'two-second rule' used for?
- Timing traffic light changes
- Maintaining a safe following distance behind the vehicle ahead (Correct answer)
- Checking mirrors every two seconds
- Timing gear changes
Correct answer: Maintaining a safe following distance behind the vehicle ahead
The two-second rule helps you maintain a safe following distance. Pick a fixed point and ensure at least two seconds pass between the vehicle ahead and yours passing it.
Question 5: During heavy rain, should you drive at the posted speed limit?
- Yes — the limit is always safe
- No — you should drive below the limit at a speed appropriate for conditions (Correct answer)
- Only if your wipers are working
- Yes, if you have new tyres
Correct answer: No — you should drive below the limit at a speed appropriate for conditions
The posted speed limit is the maximum for ideal conditions. In heavy rain, you should drive significantly below the limit to account for reduced visibility and grip.
Question 6: What device is commonly used to enforce speed limits in Singapore?
- Speed bumps only
- Fixed and mobile speed cameras (Correct answer)
- Police officers only
- Self-reporting by drivers
Correct answer: Fixed and mobile speed cameras
Singapore uses both fixed speed cameras and mobile speed detection devices to enforce speed limits across the road network.
BTT Speed Limits and Zones 2
On a wet road, how does your braking distance change compared to a dry road?