A vehicular network scenario (Manhattan grid) is created using SUMO and is integrated to OMNet++. General routing for VANET like GSR, A_STAR is applied and also general location service is applied like GLS and HLS. For the random selection of source and destination, I found that some time routing is better and for some other case location service is better? I am not able to realize the factor for which location service dominates over routing or the routing dominates over the location service? Any explanation for this....