At the beginning of the race, get out of your car and go to the nearest corner that has cement blocks. Grab the cement blocks and create a sort of barrier in the middle of the road (stack them if possible). This makes it almost impossible for your opponent racers to go past that point. Shortly afterwards, they will all crash and pile up. Once all of them are piled up, shoot the gas tank of one of the cars. A chain reaction will occur and all the racers will be dead. You are now the only one remaining in the race.