How-to guide · Ford of Peoria · Peoria, IL
Illinois Speed Limits Explained
It is the driver's responsibility to know the posted speed limit, the Illinois State Police says. Here are the maximum speeds Illinois law sets by road type, the lower limit when you tow, the rule that you must still slow down for conditions, and how the ISP enforces speed, for drivers around Peoria.
The short answer
Illinois maximums are 70 mph on interstates outside urban areas, 65 mph on rural interstates, 55 mph on interstates near or in major cities and on other highways, and 30 mph in urban areas, unless signs post a different limit. Vehicles towing another vehicle are limited to 60 mph outside urban districts. Always drive the posted limit or slower when conditions call for it.
Illinois maximum speed limits by road type
The Illinois State Police lists these maximums, which apply unless some other speed restriction is established:
| Road | Maximum speed |
|---|---|
| Interstate highways outside urban areas | 70 mph |
| Rural interstates | 65 mph |
| Interstate highways near or in major cities | 55 mph |
| Other highways | 55 mph |
| Urban areas | 30 mph |
From the Illinois State Police, "Speed Limit Enforcement," read October 28, 2026. Posted signs can set a lower limit; always follow the sign. This page is a summary, not legal advice.
Lower limit when towing or driving a heavy vehicle
Outside an urban district, the maximum speed is 60 mph for any vehicle towing any other vehicle, the ISP says. The same 60 mph maximum covers house cars, campers, private living coaches, vehicles licensed as recreational vehicles, and second-division vehicles designed or used to carry a gross weight of 8,001 pounds or more.
If you pull a camper, boat or utility trailer behind your truck or SUV, plan your trip around that 60 mph maximum even where cars may legally go faster.
From the Illinois State Police, "Speed Limit Enforcement," read October 28, 2026.
The reasonable-and-proper rule
No vehicle may be driven on any Illinois highway at a speed greater than is reasonable and proper with regard to traffic conditions and the use of the highway, or that endangers the safety of any person or property, the ISP says.
Staying under the maximum does not relieve you of the duty to slow down when approaching and crossing an intersection, going around a curve, approaching a hill crest, traveling a narrow or winding road, or when pedestrians, other traffic, weather or highway conditions create special hazards. Speed must be decreased as necessary to avoid colliding with any person or vehicle on or entering the highway.
From the Illinois State Police, "Speed Limit Enforcement," read October 28, 2026.
How the Illinois State Police enforces speed
The ISP says it uses these methods to determine vehicle speed:
Radar
Hand-held radar and moving radar, which can clock vehicles approaching from the front or rear while the trooper drives.
Pacing
Keeping pace with another vehicle and reading the speedometer.
Laser
Laser speed measuring devices, which bounce laser light beams off a moving vehicle.
Photo and aircraft
Photo speed enforcement, and air speed measurement from the ISP's fleet of fixed-wing aircraft.
From the Illinois State Police, "Speed Limit Enforcement," read October 28, 2026.
What the ISP says about speeding penalties
The Illinois State Police page describes bail and offense levels this way:
| Speed over the posted limit | What the ISP says |
|---|---|
| 1 to 25 mph over | Bail of $164 under Supreme Court Rule 526, posted as cash, an approved bond certificate, or a signed Promise to Comply |
| 26 to 34 mph over | Class B misdemeanor; bail of 10% of $2,500 or $250, or the driver's current Illinois license; mandatory court appearance |
| 35 mph or more over | Class A misdemeanor; bail of 10% of $2,500 or $250, or the driver's current Illinois license; mandatory court appearance |
From the Illinois State Police, "Speed Limit Enforcement," read October 28, 2026. The ISP adds that Class A and B misdemeanors are arrestable offenses, and describes the Sign and Drive law (625 ILCS 5/6-308), which generally lets cited drivers keep their license. Fines and court costs are set by the courts; this page is not legal advice.
Speed-safety tips from the ISP
The ISP's advice on avoiding a speed-related crash:
Obey the posted limit
Obey the posted speed limit on all roads, and reduce your speed when road conditions are less than ideal.
Go with the flow
Travel at the same pace as other traffic, staying within the speed limit. If most other vehicles are speeding, stay to the right.
Two seconds back
Follow at a distance of at least two seconds. At night and in other low-visibility conditions, reduce speed, increase your following distance and use your headlights.
Buckled, sober, maintained
Always wear your safety belt, never drink and drive, and maintain your vehicle and tires in safe working order.
From the Illinois State Police, "Speed Limit Enforcement" (How To Avoid Being A Speed Related Crash Statistic), read October 28, 2026.
Keep your tires and brakes ready
The Works® at Ford of Peoria includes a synthetic blend oil change, tire rotation and pressure check, brake inspection, Multi-Point Inspection, fluid top-off, battery test, and a filter, belts and hoses check. The ISP's speed-safety tips include keeping your vehicle and tires in safe working order; The Works is a general vehicle checkup you can book any time of year.
Schedule service online and see our service specials first. Ford of Peoria is at 2211 W. Pioneer Pkwy. in Peoria. Get directions.
Ford of Peoria service hours
| Days | Hours |
|---|---|
| Mon-Fri | 7 a.m.-5:30 p.m. |
| Sat | 8 a.m.-noon |
| Sun | closed |
From Ford of Peoria's website, October 28, 2026. Holiday hours can differ.
Illinois speed limit FAQ
What is the speed limit on Illinois interstates?
The Illinois State Police says the maximum is 70 mph on interstate highways outside urban areas, 65 mph on rural interstates, and 55 mph on interstate highways near or in major cities, unless signs say otherwise. Always follow the posted limit.
What is the default speed limit in an Illinois city or town?
The ISP says the maximum is 30 mph in an urban area unless some other speed restriction is established.
Is the speed limit lower when I tow a trailer in Illinois?
Yes. The ISP says the maximum speed outside an urban district is 60 mph for any vehicle towing another vehicle, and for campers, house cars, vehicles licensed as recreational vehicles and second-division vehicles designed or used to carry a gross weight of 8,001 pounds or more.
Can I get a ticket for driving under the speed limit?
Illinois law says no vehicle may be driven at a speed greater than is reasonable and proper for traffic conditions and the use of the highway, the ISP says. Staying under the maximum does not relieve you of the duty to slow down for intersections, curves, hill crests, narrow or winding roads, pedestrians, weather or road conditions.
What happens if I am caught going 26 mph or more over the limit in Illinois?
The ISP says speeding more than 26 but not more than 34 mph over the limit is a Class B misdemeanor, and 35 mph or more over is a Class A misdemeanor. Both come with a mandatory court appearance, and Class A and B misdemeanors are arrestable offenses.
How does the Illinois State Police measure speed?
The ISP lists hand-held radar, moving radar, pacing, laser speed measurement devices, photo speed enforcement and air speed measurement from aircraft.
What does The Works at Ford of Peoria include?
The Works® at Ford of Peoria includes a synthetic blend oil change, tire rotation and pressure check, brake inspection, Multi-Point Inspection, fluid top-off, battery test, and a filter, belts and hoses check.
Book a routine checkup
Book The Works, which includes a tire pressure check, brake inspection and battery test, at Ford of Peoria.
Sources
Speed limits, enforcement and penalty details are from the Illinois State Police Speed Limit Enforcement page, read October 28, 2026. This page is a plain-language summary, not legal advice. Service details, address and hours are from Ford of Peoria's own website, checked the same day. Photo is illustrative.
- Traffic and Safety: Speed Limit Enforcement (maximum speeds, enforcement, bail, speed-safety tips), Illinois State Police, read October 28, 2026
- General service: The Works, Ford of Peoria, October 28, 2026
- Address and service hours (structured data), Ford of Peoria, October 28, 2026