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- calendar_today October 26, 2026
MoDOT Reveals Segments for Increased Interstate Speed Limits
The Missouri Department of Transportation (MoDOT) has identified specific interstate segments where the speed limit will be raised to 75 mph. This announcement follows a comprehensive internal review and the passage of a new law permitting MoDOT to increase rural highway speed limits.
Background and Review Process
MoDOT undertook a detailed evaluation before setting new interstate speed limits. "The department takes careful consideration of all the different factors that make up a roadway when setting speed limits, including how people use it," said Ed Hassinger, MoDOT Director. "This decision is not made lightly and comes after a detailed study into each of those factors to determine where we can move people and traffic efficiently at higher speeds without sacrificing safety."
Key factors considered included:
- Current traffic and truck volumes
- Speed data and crash history
- Terrain and road design
- Safety countermeasures
- Existing speed limits of neighboring states
- Presence of active construction
Specific Interstate Segments Affected
The following interstate corridors were chosen for the 75-mph speed limit increase:
- I-29: From Exit 56 in Andrew County to approximately 2.5 miles south of the Iowa border (64 miles)
- I-35: From the northern Cameron city limit to approximately 4 miles south of the Iowa border (55 miles)
- I-49: From the Arkansas border to Exit 24 (24 miles); and from Exit 56 to just south of Exit 101 in Nevada (45 miles)
- I-55: Several segments including:
- Arkansas border to mile marker 16.6 just south of the I-155 interchange (17 miles)
- Mile marker 19.8 (north of MO 84 interchange) to mile marker 64.9 (Rte. AA bridge) (45 miles)
- Mile marker 70.5 (north of Rte. HH) to mile marker 86.6 (south of Rte. PP) (16 miles)
- Mile marker 106.4 (north of Exit 105) to mile marker 164.9 (Jefferson County line) (59 miles)
A map showing the approximate locations of these segments is available on the MoDOT website.
Implementation Timeline and Speed Limit Updates
MoDOT crews will begin updating speed limit signs on the affected stretches of interstate this fall. Until signs are changed, drivers must continue to observe the currently posted limits along these highways.
Col. Michael A. Turner of the Missouri State Highway Patrol emphasized, “An increased speed limit may allow motorists to reach their destinations faster, but safety must remain a priority.” He reminded drivers to adjust their speed to conditions and remain attentive for traffic safety.
Ongoing Safety and Potential Adjustments
MoDOT will continue to monitor crash data and traffic safety trends on these corridors. Adjustments, including possible reductions of the speed limit back to 70 mph, may be made if deemed necessary. Hassinger stated, "Let me emphasize the word ‘limit’ here. The highways across our state were not built for 80+ mph traffic. ... Getting where you’re going safely begins and ends with the decisions you make behind the wheel."
Drivers are encouraged to always buckle up, remain alert, drive sober, and observe posted interstate speed limits for the safety of all road users.
For More Information
To view the interactive map of the updated segments or learn more about modot speed updates and rural highway speed limits, visit MoDOT’s official website.
Source: suntimesnews.com.
