The two-second following rule gives you a minimum safe following distance. Under what conditions does that minimum apply?

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Correct answer: D. Ideal driving conditions only — more space is needed otherwise

The two-second rule is a minimum, and it applies only to ideal driving conditions. You need more space in situations like bad weather, when following a motorcycle or large truck, or when you're carrying a heavy load.

Source: MTO Driver's Handbook: Driving along — Following distance

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More Speed Limits & Following Distance questions

A municipality by-law sets a lower speed limit for vehicles crossing a specific bridge on a road under its jurisdiction. For that lower limit to take effect, what must the municipality do?
Instead of passing a separate speed by-law for every individual street, a municipality wants one by-law to lower the limit below 50 km/h across an entire designated neighbourhood at once. Does the HTA allow this kind of area-wide speed by-law?
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You're driving well under the posted speed limit on a two-lane highway with no safety reason to go that slowly, and a line of traffic is backing up behind you. Can this be a traffic offence, even though you aren't speeding?
What is the minimum safe following distance recommended for ideal driving conditions?
Unless otherwise posted, what is the default maximum speed limit in a city, town, or village in Ontario?
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Study the rules first in the Speed Limits & Following Distance guide, or browse all free G1 questions.