Question Before passing another vehicle, you should: Answers Flash your headlights to alert the driver. Turn on your four-way flashers to warn the driver. Give the proper turn signal to show that you are changing lanes. Sound your horn to get the driver's attention. Explanation Before passing, make sure the passing lane is clear and activate the proper turn signal to show you are going to change lanes. Signal early enough for other drivers to know your plans in advance. 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 15 Pennsylvania Practice Test 15