> Up until around 1990 or so 55MPH was the maximum speed limit The NMSL (National Maximum Speed Limit) was enacted in 1973, modified in 1987 to allow 65 mph sp

> Up until around 1990 or so 55MPH was the maximum speed limit The NMSL (National Maximum Speed Limit) was enacted in 1973, modified in 1987 to allow 65 mph speed limits on rural interstates, and repealed in 1995. Many states in the southeast, midwest and west raised their posted speed limits very soon after the NMSL was repealed. States in the northeast took a bit longer to update their laws to remove their state maximum speed limit.