Navigation systems are a great way to find your way during a road trip. However, sometimes they don't give the right directions. If there is recent construction in an area, it may not be reflected on the navigation system. It's always best to carry road maps with your navigation system. Before you leave on your road trip, check the road maps to familiarize yourself with the route. Road maps are very accurate, when compared to navigational systems. Plan your road trip a few weeks in advance. Pack road maps, snacks and your favorite music. Fill your tank with gas before you leave home. If you are traveling a great distance, pay attention to gas station signs along the way.