A NP-hard problem, vehicular routing is a combinatorial optimization problem. Vehicular routing problem with time windows indicates vehicular routing with specified start and end time. There will be “n” number of vehicles starting from the depot to cater to the needs of “m” customers. In this paper, Gehring and Homberger benchmark problems are considered wherein the size of customers is taken to be 1000. Artificial Bee Colony Optimization algorithm is executed on these 60 datasets and the number of vehicles along with total distance covered is recorded. The modified version of Deterministic Finite Automata is applied along with the Artificial Bee Colony Optimization and the results produce 25.55% efficient routes and 15.42% efficient distance compared to simple Artificial Bee Colony Optimization algorithm.