DGT DGT Speed Management & Distance Control 2

Question 1

On a freeway, what is the maximum speed limit typically posted when passing through a construction zone with workers present?

Accepted Answer

45 mph

Answer

Construction zone speed limits with workers present are commonly reduced to 45 mph or less to protect workers and drivers.

Question 2

What does 'hydroplaning' mean in the context of speed management?

Accepted Answer

A vehicle's tires losing contact with a wet road surface

Answer

Hydroplaning occurs when a layer of water builds up between the tires and road surface, causing loss of steering and braking control.

Question 3

When driving downhill on a steep grade, which technique best controls vehicle speed?

Accepted Answer

Shifting to a lower gear and using engine braking

Answer

Engine braking in a lower gear reduces wear on brakes and provides steady speed control on steep descents.

Question 4

A driver's reaction distance at 50 mph is approximately how many feet assuming a 1.5-second reaction time?

Accepted Answer

110 feet

Answer

At 50 mph (73 ft/sec), a 1.5-second reaction time means the vehicle travels roughly 110 feet before braking begins.

Question 5

Which of the following best describes 'speed matching' on a highway merge?

Accepted Answer

Accelerating to match freeway traffic speed before merging

Answer

Speed matching means reaching the same speed as highway traffic before merging to avoid dangerous speed differentials.

(DGT) Directorate-General for Traffic Test Practice Test