Assuming the roads are safe and clear, how fast can you legally go? Well, it depends on where you are. At a posted school crossing, the speed limit is 15mph. In business or residential districts, the speed limit is 25mph. Specific sections of highway have a speed limit of 75mph, but some areas of highway only 65mph or 55mph, so be sure to watch for posted local limits.

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 the Grand Canyon.