Higher November 2019 Paper 2 Q3
3. The table below gives information from the Highway Code on stopping distances for cars.
| Speed | Stopping distance in metres = Thinking distance + Braking distance (Thinking distance is given first, followed by Braking distance) | |
|---|---|---|
| 20 mph | 6 m | 6 m |
| 30 mph | 9 m | 14 m |
| 40 mph | 12 m | 24 m |
| 50 mph | 15 m | 38 m |
Remember 50 mph is 80 km/h.
The stopping distances given in the Highway Code assume good driving conditions and alert drivers.
When a driver is tired and the road is wet, the thinking distance increases by 30% and the braking distance increases by 20%.
A tired driver travels at 64 km/h in wet driving conditions.
Calculate their stopping distance in metres. [4]
| Scheme | Marks | Comments |
|---|---|---|
| 64 km/h is \(64 \times 50 \div 80\) | M1 | |
| 40 (mph) | A1 | CAO |
| \(12 \times 1.3 + 24 \times 1.2\) or for sight of 15.6 and 28.8 | M1 | FT ‘their mph’ for one of:
|
| 44.4 (m) | A1 | Only FT for speeds used from the table |
| (4) |