Assuming the roads are safe and clear, how fast can you legally go? Well, it depends on where you are. In a posted school zone, the speed limit is usually lower than the surrounding area. In any urban district, the speed limit is 30mph. Specific sections of highway might have a speed limit of 65 or 70mph, but most other areas, including county or township 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 into the side of a barn.