Question When traveling at highway speeds on a dry road, a safe following distance is at least: Answers Three seconds. Two seconds. Four seconds. Two car lengths. Explanation In general, when driving on a dry highway, a four-second following distance will provide adequate time to steer or brake to avoid a hazard. Pass your DMV Written Test with flying colors Take me to the cheat sheet Pennsylvania This questions appears in the following tests: Pennsylvania Practice Test 12 Pennsylvania Practice Test 3