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Navigation for unmanned vehicles always required correct positions during the movement of vehicle. Normally GPS is considered a valuable tool for the purpose of navigation and surveillance. Any obstruction in the area of GPS antenna can cause very significant reduction in accuracy. Therefore, GPS-INS based solution is utilized to improve accuracy. In case of small vehicles (like TOY cars), hardware integration of such module (giving INS-GPS combined solution) is a very difficult and expensive task. So to give a better approach, GPS is integrated in the design with a simple opto coupler based ABS sensor. ABS sensor is utilized to monitor absolute distances covered by vehicle. To establish collision free navigation IR modules are used to detect obstacles in front of them. This combined solution is evaluated and it is found a low cost, simple and intelligent solution but its efficiency has to be improved by further research on hardware implementation and software algorithm development.