Those preparing to travel by car during the upcoming holidays might find the My Trip Calculator helpful when deciding the route and which vehicle to take. The online interactive tool provides routes with turn-by-turn directions, a trip map and estimated driving time. However, it also allows the user to compare fuel costs for up to three vehicles. According to the U.S. Department of Energy, "The best feature of My Trip Calculator is the ability to customize fuel cost calculations for your trip." This allows users to estimate how much they will spend on fuel before the trip begins.