Question You may cross a single solid white line on the highway: Answers Whenever you want to. If traffic conditions require you to do so. Only to turn into a driveway. Only to make a U-turn. Explanation You may cross a single solid line to pass other vehicles or change lanes, but only if obstructions on the road or in traffic make the lane change necessary. Pass your DMV Written Test with flying colors Take me to the cheat sheet New York This questions appears in the following tests: New York Practice Test 14 New York Practice Test 18