Horses fears

Most loud noises will scare a horse. One of the biggest fears of a horse is cars, since cars can be very loud and they are moving. So if you are in a car and see someone on a horse or in a carriage please SLOW DOWN, because if the horse tries to run away they could hurt a person or themselves. My horse Lily does not like roads at all, when ever we are near the road she rather wants to run across the road or not cross at all. She has had some bad experiences with cars, one day she got loose and went near the road a car stopped in the road and Lily who is curious about everything stuck her head in the opened car window, why the people opened their window is still a question I am asking. So then when she stuck her head in the window the people in the car got scared and speed away. So Lily got hit in the head by the car and got scared of the car going really fast. So thanks to those people I now have retrain Lily to get used to cars and the road. 
Some other things horses may be scared of getting on trailers, walking on bridges, clippers, blankets, injections, feet handling, walking in water, and there are a lot more. One of the biggest ways people help train horses to over come their fears is to make them walk over a tarp, since it is loud when they walk over it and does not look like the ground. People also may put a tarp over the horse. Horses may have a lot of fears but then can get rid of their fears if they are trained to, it may take some time but it is worth it to have a calm horse than to have a scared horse.