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Saskatchewan Class 7 Practice Test
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Passing target: 20 correct signs and 20 correct rules
Observation, Speed & SpaceStandalone practice
In ideal conditions, you keep a three-second following interval first at 50 km/h and then at 100 km/h. How does the physical gap change?
Correct answer: It becomes twice as long because you travel twice as far each second.
Why
At 100 km/h, a vehicle travels twice as far in three seconds as it does at 50 km/h. Keeping the same three-second interval therefore doubles the physical following gap. This is why a time-based method adjusts with speed. Three seconds is the ideal-condition recommendation; adverse conditions require more room.
Verified against Saskatchewan Driver's Handbook: A Guide to Safe Driving · Basic driving skills · p. 110, 111
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