California DMV Permit Test (Class C)Safe Driving PracticesEasy
You are driving on a wet road. To maintain a safe following distance, how should you adjust the typical 'three-second rule' for dry conditions?
- AKeep it at three seconds, as it accounts for minor adverse conditions.
- BIncrease it to five seconds only if it's raining heavily.
- CDecrease it to two seconds to improve reaction time.
- DIncrease it to at least four seconds.
Show answer & explanationAnswer & explanation
Correct answer: D. Increase it to at least four seconds.
On wet roads, it takes longer to stop because tires have less traction. The California Driver Handbook recommends increasing your following distance to at least 4-5 seconds in adverse conditions like wet roads to provide more time and space to react.
Why the other options are wrong
- A. Three seconds is for ideal dry conditions; wet roads require more time and space.
- B. While heavy rain might require even more, at least four seconds is the minimum recommended increase for any wet road condition.
- C. Decreasing following distance on wet roads is unsafe as it reduces reaction and braking time.
Following Distance (Wet Roads)
Adjusting safe following distance for reduced traction on wet surfaces.
- Wet roads reduce tire traction.
- Stopping distances increase significantly.
- Increase the 'three-second rule' to 4-5 seconds or more.
Memory trick: Wet roads mean more space, give yourself grace.