Some drivers would say that the United States is a crazy quilt of speed limits, with an emphasis on the "crazy."
Since 1995, states have been free to set their own maximum speed limits, leading to long debates on safety standards. To some folks, the speed limits are just insane -- either too low or too high, depending on their views about what makes driving safe.
Advocates of low speed limits won't find much to like about Texas. True to its frontier roots, it stands out as the land of the fast getaway. The top rural speed limit is normally 70 mph, but in 2006 it set a maximum daytime speed of 80 miles per hour, the highest speed limit on the country, on more than 500 miles of rural interstate in its southwest corner.
80 mph -- Texas (on about 500 miles of Interstate 10 and 20 in southwest corner of the state)
75 mph -- Arizona, Colorado, Idaho, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, South Dakota, Texas (in counties with less than 10 people per square mile), Utah, Wyoming
70 mph -- Alabama, Arkansas, California, Florida, Georgia, Indiana, Iowa, Kansas, Louisiana, Minnesota, Mississippi, Missouri, North Carolina, South Carolina, Tennessee, Washington State, West Virginia