Beginning August 28th, 2026, Missouri will raise the maximum speed limit to 75 mph on select rural interstates, though the change is rolling out sign by sign rather than all at once.
The higher limit does not apply everywhere, urban interstates, state highways, work zones, and school zones all keep their existing posted limits. Until MoDOT physically replaces the sign on a given stretch, the old limit still applies there.
When Does the 75 mph Limit Start?
The new limit officially takes effect once MoDOT replaces the old signs on each eligible stretch of highway. Until you see a new 75 mph sign posted, the previous limit still applies. MoDOT is managing the rollout across the state, so timing varies by corridor.
Where Does 75 mph Apply in Missouri?
The 75 mph limit applies only to certain rural interstates , not every Missouri highway gets the increase.
Here’s the breakdown:
- Rural interstates: Stretches of I-70, I-44, I-55, I-49, and I-29 through less populated areas are eligible for the new 75 mph limit.
- Urban interstates: Corridors through St. Louis, Kansas City, Springfield, and Columbia keep their lower posted limits.
- State highways and lettered routes: Roads like U.S. Route 60 and Missouri’s lettered county routes are not part of this change.
Do Urban Interstates Keep Lower Limits?
Yes. City stretches of interstate have more traffic, more merges, and more exits and on-ramps, all of which raise crash risk significantly. Urban interstates will remain at their posted limits, so pay close attention to signs as you travel in and out of metro areas.
Does 75 mph Apply to Trucks and Buses?
Missouri law does not set a separate, lower speed limit for commercial trucks or buses, so large vehicles are legally permitted to drive 75 mph in the designated zones just like passenger cars.
Many trucking companies install electronic speed governors, devices that electronically cap a truck’s top speed , to keep their fleets below the posted maximum for safety and fuel efficiency. What the law allows and what a specific trucking company permits its drivers to do are two different things.
What Exceptions Still Apply in Work Zones and School Zones?
The 75 mph limit never overrides a posted work zone or school zone speed limit. If you see a reduced speed sign in an active work zone or near a school, that number is the law , regardless of what the interstate sign said miles back. In Missouri, fines doubled in Missouri work zones typically apply to speeding in these zones.
Do Conditions Override a 75 mph Sign?
Yes. A posted speed limit is a maximum , not a guarantee of safety. Missouri’s basic speed law is the rule requiring you to drive at a speed that is safe and reasonable for current conditions.
Rain, ice, fog, or heavy traffic can make 75 mph both dangerous and illegal, and if you cause a crash while driving too fast for conditions, you can be held responsible even if you were under the posted limit.
How Will 75 mph Be Enforced?
The Missouri State Highway Patrol enforces speed limits using radar, laser, aircraft, and patrol car pacing. There is no legal speed buffer Missouri , 76 mph in a 75 mph zone is a citable offense. Officers have discretion, but the myth that you can legally drive five over has no basis in Missouri law.
What Are the Penalties for Speeding in Missouri?
A speeding ticket in Missouri hits you two ways: a fine you pay upfront and points added to your driver’s license. Points stay on your record, insurance companies use them to raise your rates, and too many can trigger license suspension.
| Miles Over Limit | Points Added | Typical Fine Range |
| 1–5 mph | 2 points | $75–$150 |
| 6–10 mph | 2 points | $85–$200 |
| 11–15 mph | 2 points | $100–$250 |
| 16–19 mph | 2 points | $125–$300 |
| 20+ mph | 3 points | $200–$1,000+ |
At extreme speeds, you are no longer just facing a traffic fine. Missouri can charge you with Careless and Imprudent Driving, a criminal offense that carries heavier fines, more points, and possible jail time.
In our experience handling speeding-related car accident cases in St. Charles County, the issue that surfaces most often is how quickly points and fines escalate once a crash is involved, and insurers then use that citation to argue the injured driver shares part of the blame.
We routinely see adjusters treat a moving violation from the responding officer as if it settles the fault question by itself, which is rarely true. Pushing back on that assumption early is often what separates a fair settlement from a lowball one.
How Does Missouri Compare to Neighboring States?
Missouri’s move to 75 mph puts it in line with Kansas Oklahoma 75 mph rural interstates. Some neighboring states continue to maintain lower posted maximum speed limits on certain rural interstates. Further west, Texas, Utah, and Wyoming reach speeds up to 80 mph on certain rural stretches , and Texas even has a toll road posted at 85 mph: Texas 85 mph toll road.
How Does a Higher Speed Limit Affect Crashes and Claims?
Five miles per hour doesn’t sound like much. In a crash, it changes everything.
Because collision energy increases with speed, a crash at 75 mph releases far more force than one at 70 mph, and your body absorbs all of it. Stopping distances grow significantly too, and at highway speed, those extra feet disappear in a fraction of a second when someone brakes without warning.
Then the insurance fight starts. Large insurance companies are trained to delay, deny, and minimize your claim, and a high-speed crash gives them more ammunition.
- They’ll argue you were speeding too. Missouri uses a comparative fault rule, meaning if you’re found even partially responsible, your compensation is reduced by that percentage. Found 20% at fault? You recover 20% less.
- They’ll dispute your injuries. Higher-speed crashes cause severe, complex injuries, and insurers know those claims are expensive. Expect them to challenge every diagnosis and question every bill.
- They’ll come in fast with a lowball offer. Adjusters know you’re scared and financially strained. A quick, cheap settlement before you know the full extent of your injuries is one of their oldest moves.
What Should You Do after a Highway Crash?
If you’ve been hurt in a crash on a Missouri interstate, these steps protect your health and your legal right to compensation.
- Get to safety and call 911. Move to the shoulder if you can and turn on your hazard lights. Report the crash and any injuries right away.
- Document the scene. Photograph the vehicles, road conditions, skid marks, and visible injuries. Get names and contact information from witnesses before they leave.
- Get medical attention. Go to the ER or urgent care even if you feel fine. Adrenaline masks serious injuries , whiplash, concussion, internal bleeding , for hours or even days after impact.
- Decline a recorded statement. The other driver’s adjuster will call quickly asking for a recorded statement. Politely decline until you’ve spoken with an attorney , anything you say can be used to minimize your claim.
- Contact our Missouri car accident lawyers. Before you sign anything or accept a settlement, get a free consultation so you know exactly what your case is worth.
Injured on a Missouri Highway? Get Legal Help Today.
After a crash, you’re hurting, the bills are piling up, and an insurance adjuster is already trying to push you into a fast, cheap settlement , before you even know how seriously you’re injured. That’s when you need someone who knows exactly how these companies operate and isn’t afraid to fight back.
We’re Beck & Beck Missouri Car Accident Lawyers, brothers John Beck and Paul Beck. We are the only law firm in Missouri that handles exclusively auto accident cases. Not a general personal injury firm with a car crash department.
Every single case we take is a car accident case, and that specialization gives us a depth of knowledge about Missouri’s courts, insurers, and traffic laws that no generalist firm can match.
We have secured significant recoveries for injured Missourians, including individual settlements that reached multi-million-dollar levels. When you hire us, a founding partner handles your case personally , it is never handed off to a paralegal.
A serious crash doesn’t just hurt you physically , it can crush you financially. We work on a strict no-win, no-fee basis, so you pay nothing unless we win. If you don’t have health insurance, we can connect you with doctors who will treat you now and wait for payment until your case resolves. If the bills are overwhelming you in the meantime, we can connect you with reputable pre-settlement funding companies.
We have offices in St. Louis, Florissant, O’Fallon, Columbia, Kansas City, Springfield, Kirksville, and Cape Girardeau, and we handle cases fully remotely when that works better for you. We handle everything. All you have to do is work on getting better.
Call us today for a free, no-obligation consultation.
FAQ: Missouri 75 mph Speed Limit
Can You Legally Drive 5 mph over the Speed Limit in Missouri?
No. Missouri law provides no legal buffer , driving even one mph over the posted limit is technically a citable offense. Officers exercise personal discretion, but the law itself gives you zero protection.
Does Any State Have an 80 mph Speed Limit?
Yes. Several Western states post higher speed limits on some rural highways. Texas also has one toll road posted at 85 mph.
Is There a 90 mph Speed Limit Anywhere in the US?
No. The highest posted speed limit US is 85 mph on a single stretch of toll road in Texas , no public road in the United States is posted at 90 mph.
Does the 75 mph Limit Still Apply in Bad Weather?
No. Missouri’s basic speed law requires you to drive at a speed safe for current conditions, so rain, ice, or fog can make 75 mph both dangerous and illegal regardless of the posted sign.
Can a Speeding Conviction in a 75 mph Zone Raise Your Insurance Rates in Missouri?
Yes. A speeding conviction adds points to your Missouri driving record, and insurance companies use those points to justify raising your premiums at renewal.
What Should You Do if a Speeding Driver Hit You on a Missouri Interstate?
Call Beck & Beck for a free case evaluation, if another driver’s speed caused your injuries, you have the right to pursue compensation for your medical bills, lost wages, and pain and suffering.
