Cars were built with light signals for a number of reasons: Lets the car behind you know that you are going to be slowing down to turn. This way you don’t get rear ended by someone who’s texting while driving… Gives the cars coming toward you fair warning that you might or about to cut in front of them to turn left Tells pedestrians to hurry up and scurry across the street or they will be ran over When turning - there is no need to stop, park, then turn. If you think while