GPS device developer TomTom has published some data from its users revealing the slowest and fastest roads in the United States, plus another interesting fact: most of its drivers are staying within the speed limits. Calculated from the data found in SpeedProfiles, TomTom's speed database, most of the recorded speeds are from drivers on interstate highways and when there isn't much traffic.
Some of the key findings:
- Mississippi has the fastest roads, where the posted speed limits range from 65 to 70 MPH.
- The fastest American road is I-15 through Utah and Nevada. The posted speed limit is as high as 80 MPH in some spots, with the driver average being around 77.67 MPH
- The slowest average MPH is in Washington D.C., with averages around 46 MPH, followed by Hawaii (53 MPH), Delaware (61 MPH), Rhode Island (63 MPH), and Oregon (63 MPH).