Speed Limiter Mandate: What Truckers Need to Know

The speed limiter mandate for trucks remains stalled as of 2026, with no federal requirement forcing all commercial vehicles to use electronic speed limiters. However, many major fleets voluntarily limit speeds to 65-68 mph, and some states are considering their own regulations. The original FMCSA proposal from 2016 has been withdrawn and reintroduced multiple times without becoming law.

Current Status of Federal Speed Limiter Rules

The Federal Motor Carrier Safety Administration (FMCSA) has not implemented a mandatory speed limiter rule as of 2026. The agency's most recent proposal would have required trucks over 26,000 pounds to use speed limiters set at 60, 65, or 68 mph.

**Owner-operators and small fleets are not required to install or activate speed limiters** on their trucks. If your truck came with a speed limiter from the factory, you can legally disable it in most states, though some fleet insurance policies may require them.

The trucking industry remains divided on this issue. Large carriers often support speed limiters for fuel savings and safety, while owner-operators argue they create dangerous speed differentials with passenger vehicles.

Which Fleets Currently Use Speed Limiters?

Most major trucking companies have voluntarily implemented speed limiters regardless of federal requirements. Here's what we see in our shop:

**Large fleet carriers** typically limit speeds to 65-68 mph. Companies like Schneider, Swift, and JB Hunt have used speed limiters for over a decade. Their trucks are programmed at the ECM level and cannot be easily overridden.

**Regional carriers** often set limits at 70-72 mph to remain competitive while still achieving fuel savings. These companies balance driver retention with operational costs.

**Owner-operators** rarely use speed limiters unless required by a lease agreement or insurance policy. Most prefer the flexibility to adjust speed based on traffic conditions and terrain.

If your fleet is requiring speed limiter activation and you're having ECM programming issues, call Skyliner Truck Center at (570) 655-2805. Our technicians handle ECM programming and can explain your options under current regulations.

State-Level Speed Limiter Laws

While no federal mandate exists, several states have introduced their own speed limiter legislation. California considered requiring speed limiters for trucks operating within state borders, but the bill stalled in committee.

**Pennsylvania does not require speed limiters** as of 2026. Trucks operating on I-81 and I-84 through our service area can legally operate at posted speed limits without electronic restrictions.

Some states are exploring speed limiter requirements as part of emissions reduction programs. These proposals typically target trucks operating in major metropolitan areas or specific highway corridors.

How Speed Limiters Actually Work

Speed limiters are programmed through the engine's electronic control module (ECM). The system monitors vehicle speed and reduces fuel delivery or engine power when the set limit is reached.

**Modern trucks** built after 2010 typically have speed limiter capability built into the ECM. The feature can be activated, deactivated, or adjusted through dealer programming or aftermarket software.

**Older trucks** may require additional hardware installation to add speed limiting capability. This typically costs $500-$1,500 depending on the engine and existing electronics.

The speed limit setting cannot be overridden by pressing the accelerator harder. However, the system typically allows brief speed increases for safe passing or emergency situations.

Arguments For and Against Speed Limiters

**Safety advocates** point to crash data showing that speed differential between trucks and cars creates dangerous situations. They argue that limiting truck speeds to 65 mph would reduce fatal accidents on highways.

**Fuel efficiency** is the primary reason fleets adopt speed limiters voluntarily. Reducing highway speed from 75 mph to 65 mph can improve fuel economy by 10-15%, saving thousands per truck annually.

**Driver opposition** centers on safety concerns about speed differentials. Many drivers argue that traveling significantly slower than traffic flow creates more dangerous passing situations and road rage incidents.

**Productivity concerns** focus on increased transit times. A speed reduction from 70 mph to 65 mph adds approximately 45 minutes to a 500-mile trip, affecting delivery schedules and driver earnings.

What This Means for Your Operation

If you're an owner-operator, you currently have no federal requirement to use speed limiters. However, consider these factors:

**Insurance rates** may be lower for trucks equipped with speed limiters. Some carriers offer discounts of 5-10% for fleets that voluntarily limit speeds.

**Lease agreements** with major carriers often require speed limiter activation. Read your contract carefully before signing with any company that provides trucks or freight.

**Fuel costs** can be significantly reduced with speed limiting. At current diesel prices, the fuel savings often outweigh the productivity loss from slower speeds.

Frequently Asked Questions

Can I disable the speed limiter on my truck?

Yes, if you own the truck and it's not required by your fleet or insurance policy. However, disabling factory safety systems may void warranties or violate lease agreements. Check your contracts before making changes.

Do speed limiters affect engine braking or downhill speed?

Most speed limiter systems only restrict powered acceleration. Engine braking and downhill speeds above the set limit are typically not affected, allowing normal operation on mountain grades.

Where can I get speed limiter programming done in Northeast PA?

Skyliner Truck Center in Pittston handles ECM programming for all major truck brands. We can activate, deactivate, or adjust speed limiter settings based on your operational needs and legal requirements.

Skyliner Truck Center has been handling truck electronics and ECM programming for over 70 years. If you need speed limiter programming or have questions about current regulations, call us at (570) 655-2805 or stop by the Pilot Travel Center on PA-315.