The document describes a vehicle tracking and braking system to help control traffic problems in cities with large populations and inadequate infrastructure. The system uses transmitters placed at zone entry and exit points to send the maximum speed limit for that zone to a receiver in each vehicle. A microcontroller in the vehicle then compares the actual speed to the limit and automatically regulates the vehicle's speed by varying the duty cycle of the pulse input to the motor driver. The entire system is low-cost, small in size, and can be easily installed on existing vehicles without major modifications to help enforce traffic rules and improve road safety.