Missouri lawmakers are weighing whether higher speed limits make sense in an era of increasingly safer vehicles, as a new bill proposes raising limits on some rural highways across the state.
What the Bill Would Actually Change
The measure, Senate Bill 1408, would allow speed limits on certain rural roads to increase from 70 mph to 75 mph. It wouldn’t touch highways in urban or suburban areas, focusing only on rural stretches where traffic patterns and roadway design differ significantly from city corridors.
The Case for Raising the Limit
Supporters argue the change would largely formalize behavior that’s already happening, since many drivers already travel at or above 70 mph on rural interstates. The bill’s sponsor, Sen. Jamie Burger of District 27, has pointed to advancements in vehicle technology and manufacturing since Missouri’s current limits were set, arguing the old numbers no longer reflect how roads are actually used or how modern vehicles perform.
Modern cars come equipped with features designed to assist drivers and reduce risk, including adaptive cruise control, lane-centering systems, and blind-spot monitoring, and improvements in vehicle structure, materials, and production methods have also boosted occupant protection in crashes. Supporters believe those developments make higher cruising speeds more manageable than they were decades ago.
Not Everyone Is On Board
Public reaction has been mixed. Some motorists support the proposal, pointing out they already exceed the current limit by several miles per hour and see little downside to a modest bump. Others remain concerned about the safety implications and the potential for more severe crashes.
The Missouri Department of Transportation has expressed reservations, citing data showing speed plays a role in roughly one-third of crashes statewide. Supporters of the bill counter that such figures can be misleading, since a crash categorized as “speed-related” doesn’t necessarily involve excessive speed — a vehicle traveling below the posted limit can still be considered too fast for road, weather, or traffic conditions at the time.
How Missouri Compares Nationally
The debate fits into a broader national conversation, since speed limits already vary widely across the country. Some states cap rural interstates at 60 mph, while others allow speeds up to 80 mph, and Texas operates a stretch of roadway posted at 85 mph.
Missouri lawmakers are still debating whether to follow that trend further. If the bill passes, the higher limits could take effect as early as August.