In these road building games the idea is to turn of swith the parts or blocks in such a way as to make an unbroken path from the beginning to the end-point. Look carefully at the pieces you have to work with and start building. Build a road for traffic, pipes for water, or make sure the rails for the train are in the right order. You\'ll have to be fast to get everything sorted out before the car, liquid, or train catches up with you and has an accident. Good luck!