According to the report of world health organization (WHO), about 1.27 million people lost their lives in 2009 due to the road accidents and it was the ninth foremost reason of deaths. The vehicle-to-vehicle communication system (V2V) is one of the solutions to dwindle the accident ratios. The existing V2Vs are fixed based on single radio and are inept and erratic especially in the hilly areas due to low SNR and partial coverage. Their performance is degraded in the metropolitans due to crowded population and over-burdened traffic routes. Keeping above disadvantages in mind, multi-radio access technologies (GSM/GPRS, CDMA, Wi-Fi) based V2V using cognitive radio framework has been proposed in this paper. The scheme introduces an in-vehicle cognitive radio site with the propensities of spectrum sensing, spectrum decision and spectrum mobility. Investigational results reveal that the proposed solution does not overtax the existing networks in affected area and vehicles remain aware of other vehicles even in low SNR by single radio technology and partial coverage areas.