DTT Speed and Stopping Distances

Question 1

What is the default speed limit on a national road in Ireland when no other limit is posted?

Accepted Answer

100 km/h

Answer

80 km/h

Answer

120 km/h

Answer

60 km/h

Question 2

What is the default speed limit for cars in a built-up area in Ireland?

Accepted Answer

50 km/h

Answer

60 km/h

Answer

30 km/h

Answer

40 km/h

Question 3

What is the national motorway speed limit for cars in Ireland?

Accepted Answer

120 km/h

Answer

100 km/h

Answer

130 km/h

Answer

110 km/h

Question 4

What is the total stopping distance made up of?

Accepted Answer

Reaction distance and braking distance

Answer

Thinking distance and reaction distance

Answer

Braking distance only

Answer

Speed distance and halt distance

Question 5

How does doubling your speed affect your braking distance?

Accepted Answer

It quadruples

Answer

It doubles

Answer

It triples

Answer

It stays the same

Question 6

At 100 km/h on a dry road, approximately how long is the total stopping distance for a car?

Accepted Answer

75 metres

Answer

35 metres

Answer

55 metres

Answer

120 metres

Question 7

What effect does a wet road surface have on stopping distance compared to a dry road?

Accepted Answer

At least doubles stopping distance

Answer

No effect

Answer

Reduces stopping distance by half

Answer

Increases stopping distance by 10%