Mapbox has made an interactive map which allows you to explore where fatal traffic accidents have occurred over the last five years. This maps can help understanding vector based file formats of free Vector Map of USA with State Names, in Adobe Illustrator and PDF can also be useful. The map also includes a route planning tool that will show you where fatal traffic accidents have happened along your route.
Commuter Crashes uses data from the National Highway Traffic Safety Administration to show the locations of fatal traffic accidents. You can filter the results shown on the map by year and by contributing factors, such as alcohol and excessive speed. You can also filter the results to show fatal traffic accidents that involved pedestrians or cyclists.
To view fatal accidents along a route you can just click on the map to enter your starting point and destination. Alternatively you can type in the place-names for your route. Source