Missouri Speed Limit Law Takes Effect, MoDOT Evaluates Rural Interstate Increases to 75 MPH
A new Missouri law, effective August 28, grants the Missouri Department of Transportation (MoDOT) authority to raise speed limits on certain rural highways and interstates from 70 to 75 miles per hour. MoDOT is currently evaluating several major interstates for potential increases, including I-29, I-35, I-44, I-49, I-55, and I-57. The evaluation considers factors such as truck traffic volumes, current traffic volumes, crash history, terrain, road design, safety countermeasures, and speed limits in bordering states. Interstate 70 is excluded from current consideration due to ongoing construction. MoDOT emphasizes that the review does not guarantee speed limit increases, and any changes require approval from the Missouri Highways and Transportation Commission. Safety advocates, including Advocates for Highway & Auto Safety, have raised concerns, citing studies linking higher speeds to increased fatality rates.