<Li> U.S. Route 82 in Columbus </Li> <P> House Bill 3, passed during the 2008 First Extraordinary Session of the state legislature, permits speed limits up to 80 mph (130 km / h) on toll roads in the state; however, as of 2016, no such road has been constructed . </P> <P> Mississippi has a minimum speed of 30 mph on four - lane U.S. highways when no hazard exists . Strangely, there is no law for the minimum speed of the state's growing number of four - lane state highways . The minimum is 40 mph on Interstate Highways and on four - lane U.S. designated highways that have a 70 mph speed limit . In 2004, Mississippi posted minimum speed limits (40 mph) on all rural Interstates, but this minimum speed limit was already state law before then . </P> <P> Statutory speed limits in Missouri are as follows: </P>

What are the maximum and minimum speeds on interstates in mississippi
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