A smart car is designed based on 16 bit low power consumption MCU MSP430F5438 as control core

DC motor as driving power

and uses pulse width modulation（ PWM） mode to achieve accurate control of speed; use gray sensor to detect the start/finish line and turn/overtaking sign line; using ultrasonic sensor to measure distance in the overtaking area between two cars

and track overtaking area for overtaking; overtaking communication between two vehicles using wireless communication module

which effectively avoid the collision between two cars and smoothly realize overtaking; with electronic compass module for precise positioning and turning control of the two car. The results show that smart car can achieve functions of cycling criterion driving; driving two car crashes before and after

two vehicles in the specified area complete overtaking. The control system has stable performance

strong anti-interference. It has a broad application in the field of driverless control system.