Question When passing another car, sound your horn if the car is: Answers Turning into your lane. Driving very slowly. Signaling a right turn. Explanation Use your horn to communicate with other drivers on the road. Use your horn if you are passing a driver who does not see you and is about to turn into your lane. Pass your DMV Written Test with flying colors Take me to the cheat sheet Delaware This questions appears in the following tests: Delaware Practice Test 15 Delaware Practice Test 18