Assuming the roads are safe and clear, how fast can you legally go? Well, it depends on where you are. On narrow, winding mountain highways and blind curves, the speed limit is 20mph. In business districts, the speed limit is 25mph. In residential areas, the speed limit is 30mph. Open mountain highways have a speed limit of 40mph. Specific sections of rural highway might have a speed limit of 65-75mph, but most other areas, including urban interstates and highways not otherwise posted, have a speed limit of 55mph.

Other than that, you are likely to see speed limit signs indicating a wide range of limits based on a variety of conditions, such as constructions zones, school zones, or half-finished-then-abandoned bridge zones. Just remember to always drive no faster than the speed limit (and slower still if conditions are poor) so that you don’t go ramming into the rear end of a hatchback or flying off the side of a cliff.