Does anyone know of a website with a formula or calculator that can be used to determine speed from length of skid marks? I was in an accident traveling 45 mph when a truck pulled out in front of me and I hit him. I had no time to stop. The car is a 1989 Ford Mustang GT Convertible, loaded with 4 people including myself, no anti-lock brakes. The extra weight will obviously play a role in stopping distance. I have stock brakes (front rotors, rear drums), and there was approximately 8 miles of street driving prior to the accident (brake fade). The other party claims I was speeding because there are skid marks but I wasn't cited by the police officer. Is there a formula I can use to find out for myself how long it should have taken me to stop? I know the police use one...