Maximum highway speed limits by state run from 60 mph in Hawaii to 85 mph on a tolled stretch of Texas State Highway 130, with most states landing between 65 and 75 mph on rural interstates.1Insurance Institute for Highway Safety. Maximum Posted Speed Limits Every state writes its own rules, so a single interstate can shift 10 or 15 mph the moment you cross a line, and the same highway often drops sharply as it enters a city.
Maximum Speed Limits in Each State
The groupings below reflect the highest limit posted on any public road in each state as of early 2026. In most cases that maximum applies only on rural interstate segments, and several states allow the top figure only on designated stretches where an engineering study supported it.1Insurance Institute for Highway Safety. Maximum Posted Speed Limits
States at 80 or 85 mph
Nine states permit 80 mph or higher somewhere in their highway system.
- Texas, 85 mph on specific tolled segments of State Highway 130, the fastest legal speed on any U.S. road.
- Montana, Nevada, North Dakota, and South Dakota at 80 mph statewide on rural interstates. South Dakota is the only state to post 80 on urban interstates as well.
- Idaho, Oklahoma, Utah, and Wyoming at 80 mph on designated segments, with 75 mph as the general rural interstate default.
These are mostly wide-open, low-density states where distances between cities are long and traffic is light.
States at 75 mph
A broad band of Western and Plains states caps rural interstates at 75 mph: Arizona, Arkansas, Colorado, Idaho (default), Kansas, Louisiana, Maine, Nebraska, New Mexico, Oklahoma (default), Texas (default), Utah (default), Washington on specified segments, and Wyoming (default).1Insurance Institute for Highway Safety. Maximum Posted Speed Limits Kansas and New Mexico also allow 75 mph on urban interstates, which is unusual at this tier.
States at 70 mph
The largest group of states tops out at 70 mph on rural interstates. That includes Alabama, Florida, Georgia, Illinois, Indiana, Iowa, Maryland, Michigan, Minnesota, Mississippi, Missouri, North Carolina, Ohio, Pennsylvania, South Carolina, Tennessee, Virginia, West Virginia, and Wisconsin.1Insurance Institute for Highway Safety. Maximum Posted Speed Limits A few of these go higher on specific stretches. Michigan posts 75 mph on certain freeway segments, and Kentucky permits 70 on designated routes where its default is 65.
States at 65 mph or Lower
The Northeast and Hawaii sit at the bottom of the range. Alaska, Connecticut, Delaware, Massachusetts, New Jersey, New York, Rhode Island, and Vermont all cap rural interstates at 65 mph. Hawaii maxes out at 60 mph statewide. The District of Columbia, which has no rural interstates, limits urban interstates to 55 mph.1Insurance Institute for Highway Safety. Maximum Posted Speed Limits Shorter distances, denser development, and more frequent interchanges all push these ceilings lower.
How Limits Change Between Rural and Urban Interstates
Almost every state drops the posted limit when an interstate enters a metropolitan area, but the size of the drop is inconsistent. Illinois swings from 70 on rural interstates down to 55 in urban zones. Missouri goes from 70 to 60. Several Southeastern states, including Alabama, Georgia, and Virginia, hold steady at 70 across both settings and rely on posted reductions at specific congestion points.1Insurance Institute for Highway Safety. Maximum Posted Speed Limits
Typical urban interstate limits sit between 55 and 70 mph. Northeastern states often fall to 55 near cities; Sun Belt states usually stay at 65 or 70. The change is marked by signs, and it can arrive quickly as you approach a city boundary. Missing that transition is one of the most common reasons out-of-state drivers get pulled over.
Lower Speed Limits for Trucks
About a dozen states enforce a lower speed limit for trucks and other heavy vehicles even in lanes shared with faster cars. California goes furthest: trucks with three or more axles, vehicles towing trailers, and school buses are limited to 55 mph on all highways regardless of the posted number for cars.1Insurance Institute for Highway Safety. Maximum Posted Speed Limits On a California freeway posted at 70, a truck driver has to stay 15 mph under the car limit.
Other split-limit states include:
- Montana: 80 for cars, 70 for trucks on rural interstates.
- Michigan: 75 for cars, 65 for trucks on specified freeway segments.
- Washington: 70 for cars, 60 for trucks on rural interstates.
- Indiana: 70 for cars, 65 for trucks on rural interstates.
- Arkansas: 75 for cars, 70 for trucks on interstates.
- Oregon: 65 for cars, 55 for trucks on rural interstates, with higher limits on specified segments.
No federal rule caps truck speeds. A proposal to require electronic speed governors on heavy trucks over 26,000 pounds, with caps between 60 and 68 mph, was formally withdrawn in July 2025. Individual carriers can still choose to limit their own fleets.
Work Zones and Move Over Rules
Nearly every state reduces the posted limit through active highway work zones, and most states enhance the penalties for speeding through them. Doubled fines are the common approach, with further escalation when workers are physically present. Temporary signs can drop a 70 mph highway to 55 or even 45 mph, and those reductions often apply around the clock while the zone is active, not only when workers are visible.
Work zone tickets usually can’t be dismissed through a defensive driving course, and they carry the same license points as a regular speeding violation. The combination makes them among the most expensive moving violations a driver can collect.
All 50 states also require drivers to move over or slow down when passing emergency vehicles stopped on the shoulder with lights flashing.2National Highway Traffic Safety Administration. Move Over: Its the Law Most of these laws now cover tow trucks and highway maintenance crews as well, and some states extend the rule to any vehicle with hazard lights on. The standard requirement is to change out of the lane next to the stopped vehicle; if a lane change isn’t safe, you have to slow well below the posted limit. Penalties range from fines to misdemeanor charges depending on the state.
When Speeding Becomes Reckless Driving
A speeding ticket stops being a traffic infraction and becomes a criminal charge at the reckless driving threshold, and several states draw that line at a specific speed.
- Virginia: driving 20 mph or more over the posted limit, or exceeding 85 mph on any road, is reckless driving, a criminal misdemeanor carrying up to 12 months in jail.
- Connecticut: exceeding 85 mph on any highway qualifies as reckless driving.
- Delaware: driving 90 mph or faster triggers a separate statutory violation.
- New Hampshire: speeds of 100 mph or more are treated as reckless driving.
- Utah: traveling at 105 mph or above constitutes willful or wanton disregard for safety.
Other states leave the call to officers and prosecutors based on the full circumstances. Georgia layers on a “super speeder” surcharge: a $200 fee on top of other fines and court costs for anyone convicted of 75 mph or faster on a two-lane road, or 85 mph or faster on any road. Failing to pay within 120 days triggers an automatic license suspension.
If you pick up a reckless driving conviction while passing through another state, it follows you home. Under interstate compacts, your home state will generally treat the conviction as if it happened on local roads, which means points, insurance consequences, and sometimes license action.
Automated Cameras and Variable Signs
Nineteen states and the District of Columbia authorize automated speed cameras. Ten states explicitly prohibit them. The rest have no statewide law either way.3Governors Highway Safety Association. Speed and Red Light Cameras Where cameras are legal, they most often appear in school zones and work zones, though a few jurisdictions deploy them on highways and arterials for general enforcement.
Camera citations usually go to the registered owner rather than naming the actual driver, which has produced due-process challenges with mixed results. Whether a camera ticket counts as a moving violation with license points, or as a civil penalty like a parking ticket, depends on the state. In many places camera-generated speeding citations are civil infractions with a fine but no points and no insurance effect. Confirm your state’s treatment before assuming the ticket is minor, or before deciding to ignore it.
Variable speed limit signs, the electronic displays that change with traffic or weather, carry the same legal weight as static signs. The posted number becomes enforceable the moment it changes. A sign reading 45 mph in a rainstorm means 65 is 20 over, not a few ticks above a “normal” highway speed.
The Posted Limit Isn’t Always the Legal Limit
Every state has a basic speed law requiring drivers to travel at a speed reasonable for current conditions, regardless of what the sign says.4Federal Highway Administration. Speed Limit Basics Rain, fog, snow, ice, heavy traffic, or a dark unlit road can all make the posted number too fast, and an officer can write a ticket to a driver going under the limit if conditions made that speed unsafe. The law doesn’t help you argue that 80 in a 70 was fine because the road was empty; it works the other way, meaning 70 in a 70 can still be illegal in a whiteout.