Heartsaver First Aid Part I Progress Indicator: Question 3 of 22 3.  AT HIGHWAY SPEEDS, ON A DRY ROAD, A SAFE FOLLOWING DISTANCE IS AT LEAST: Choices: 3 seconds of following distance from the car ahead of you 2 seconds of following distance from the car ahead of you 4 seconds of following distance from the car ahead of you 2 car lengths of following distance from the car ahead of you