include parts of the following roadways: U.S. Route 45 / U.S. Route 45 Alternate U.S. Route 49 / U.S. Route 49W U.S. Route 61 U.S. Route 72 U.S. Route 82 U.S. Route 84 U.S. Route 90 U.S. Route 98 U.S. Route 278 MS 15 MS 19 MS 25 MS 39 MS 57 MS 63 MS 67 MS 302 MS 605 MS 607 A speed limit of 60 mph is typically used in urban areas where a higher speed limit might be used, but traffic or geometric conditions constitute a lower speed limit, including the following areas: Interstate 20 in Vicksburg, from Jackson to Pearl, and Meridian Interstate 55 from Jackson to Ridgeland Interstate 59 in Laurel and Meridian U.S. Route 61 in Tunica Resorts U.S. Route 78 in New Albany U.S. Route 82 in Columbus House Bill 3, passed during the 2008 First Extraordinary Session of the state legislature, permits speed limits up to on toll roads in the state; however, , no such road has been constructed. 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. 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. Missouri Statutory speed limits in Missouri are as follows: Interstate highways and freeways in rural areas: 70 mph Expressways in rural areas: 65 mph (notable exceptions being the US 54 & US 63 Expressways to the north of Jefferson City, which are at-grade expressways with a 70 mph speed limit) Interstates, freeways, and expressways in urban areas: 60 mph Other numbered state-maintained rural highways: 60 mph State gravel roads: 25 mph Freeways are defined as: "a limited access divided highway of at least ten miles in length with four or more lanes which is not part of the federal interstate system of highways which does not have any crossovers or accesses from streets, roads or other highways at the same grade level as such divided highway within such ten miles of divided highway." Expressways are defined as: "a divided highway of at least ten miles in length with four or more lanes which is