The Indian Railways has one of the world’s largest railway networks in the world, comprising over 1,15,000Km (71,000 mi) of track length over a route of 67,312 Km (41,826 mi) spreading to almost all the areas of the country. However, with regard to reliability and passenger safety. There are areas where improvements can be made and new techniques can be employed to reduce possibility of accidents. Among other factors, cracks developed on the rail is the cause of accidents in some of the cases. Due to absence of timely detection and the associated maintenance pose serious questions on the security of operation of rail transport. A recent study revealed that over 25% of the track length is in need of replacement due to the development of cracks on it. Manual detection of tracks is cumbersome and not fully effective owing to much time consumption and requirement of skilled technicians. This project work is aimed towards addressing the issue by developing an automatic railway track crack detection system integrating an Ultrasonic Sensor crack sensing module and a communication module based on GSM technology by which information about the location of the crack can be conveyed to a central location enabling the immediate attention and intervention of maintenance personals. WORKING: Ultrasonic sensor is used to detect the crack on the railway track by not receiving the echo from the track; if the echo sound is received then no crack is detected on the track. The output of the ultrasonic sensor is given to the microcontroller, which is connected to the GPS, GSM and motor driver IC. A mobile no. is registered in the memory the microcontroller in which the message is send by the GSM module. In the received message a link is given by the GPS which is open in the Google map to show the route where the crack is detected. If crack will found then microcontroller will take the location from GPS and send it to a control station. At the same time a message will be display on LCD screen, and a buzzer will turn ON.