Missouri to raise speed limit to 121 km/h on selected highways
In Missouri, a law will take effect on August 28, 2026, raising the maximum permitted speed from 70 to 75 miles per hour — approximately 121 km/h — on certain rural interstate highways and freeways.
As Motor1 reports, Senate Bill 1408 was signed by Governor Mike Kehoe. It was introduced by Republican state Senator Jamie Berger.
Which roads may receive the new limit
The new law does not mean an automatic speed-limit increase on all roads in Missouri. It applies only to rural sections of interstate highways and freeways; urban highways are not covered by it.
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The Missouri Department of Transportation (MoDOT) is still assessing which roads can safely meet the new limit. Among the likely candidates, Motor1 names rural sections of I-70 and I-49 near Kansas City.
When road signs will be changed
The actual increase in the permitted speed will begin only after MoDOT completes its review and new road signs are installed. According to the publication, the review may last until the end of 2026, while signs displaying a 75 mph limit may appear late in 2026 or in 2027.
MoDOT Director Ed Hassinger told KOMU 8 News that safety must be considered when making such decisions, despite drivers' desire for convenience. Until the assessment is completed and signs are updated, drivers must comply with the current speed limits.
