JELE_V3_N3_RP7 Ramachandran G. R. Ramani S. Selvaraju B. Rajasekaran P.M. Murali Journal on Electronics Engineering 2249 – 0760 3 3 32 37 EMS, GPS, GSM, SMS The wireless black box using MEMS accelerometer and GPS tracking system is developed for accidental monitoring. This system consists of various components, such as accelerometer, microcontroller unit, GPS and GSM module. If accident occurred in any place, the wireless sensor device will send SMS to family members, emergency medical service (EMS), correctionalternate"the nearest hospital with accident place using GPS system and Google map.The threshold algorithm and speed of motorcycle used to determine fall or accident in real-time process. This system is compact and easy to install. The system is compact and easy to install. This system tested in real time applications. The test results show that it can detect to whether the normal ride or not with high accuracy. March – May 2013 Copyright © 2013 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=2257