PA DOT Regulations for Trucks: Size, Weight, CDL, and Permits

Pennsylvania DOT regulations for trucks are set out in Title 75 of the Pennsylvania Consolidated Statutes and Title 67 of the Pennsylvania Code, and PennDOT is the primary enforcer. The rules cover how big and heavy a truck can be, who can drive it, how it must be inspected, insured, registered, and permitted, and what happens on roads that carry lower posted limits. Getting any piece wrong leads to fines, out-of-service orders, or both.

Size Limits

Under Title 75, Chapter 49, a commercial vehicle on a Pennsylvania highway cannot exceed:

Width of 8 feet 6 inches, including any load.¹
Height of 13 feet 6 inches, including any load. The state is not obligated to provide clearance at that height, so verifying bridges and overpasses along the route is on you.¹
Length of 53 feet for a single trailer towed by a truck or truck tractor, with kingpin-to-rear-axle distance capped at 41 feet.¹
Length of 28½ feet per trailer in a double combination.¹
Overall length of 40 feet for a single motor vehicle, including load and bumpers. Buses may run 45 feet, boom-equipped vehicles 55 feet, and articulated buses 63 feet.¹

Anything past these dimensions needs a special hauling permit.

Weight Limits

The maximum gross weight for any vehicle or combination on a Pennsylvania highway is 80,000 pounds, including truck, trailer, and everything on board.¹ Gross weight is only one constraint. Weight is also regulated at the axle:

The steering axle is capped at 20,000 pounds.¹
Two axles spaced under 6 feet apart are each limited to 18,000 pounds. With 6 to 8 feet of spacing, one axle can carry up to 22,400 pounds while the other stays at 18,000. Beyond 8 feet, each can carry 22,400 pounds.¹

For any combination registered above 73,280 pounds, Pennsylvania also applies the federal bridge formula, which limits the weight allowed on a group of consecutive axles based on how many axles are in the group and the distance between the outer ones. Under the formula, no non-steering axle can exceed 20,000 pounds, and two consecutive tandem-axle pairs can carry 34,000 pounds each only if the outer axles of the group are at least 36 feet apart.¹ The practical point: a truck can be legal on gross weight and still get a ticket for axle-group distribution. How the load sits matters as much as what it weighs.

Posted and Bonded Roads

Pennsylvania lets the state and municipalities post weight limits on specific roads and bridges below the standard 80,000-pound cap. Many local roads weren’t built for heavy commercial traffic, and spring thaws can weaken pavement.

If your route uses a posted road, you’ll usually need a permit and a bond. The bonding amounts set by regulation are:

$6,000 per mile on unpaved roads
$12,500 per mile on paved roads
$50,000 per mile on roads maintained below standard
$10,000 per county or municipality covered for Type 3 permits

The bond guarantees payment for road damage caused by your hauling. You also need insurance of at least $250,000 per person for bodily injury and $1 million for property damage.² Violate the agreement and the municipality can revoke the permit, take over maintenance and bill you, or proceed against the bond.

Running a posted road without authorization carries its own penalty: $150 base plus $150 for each 500 pounds (or fraction) that you exceed the posted limit by more than 3,000 pounds.¹

Overweight Fines

Under Title 75, Section 4945, overweight penalties climb on a sliding scale:

Gross weight violations run $75 base plus $75 for every 500 pounds (or part thereof) more than 3,000 pounds over the limit. If the truck also exceeds the 80,000-pound cap, the fine doubles.¹
Axle weight violations run $100 base plus $100 for every 500 pounds (or part thereof) more than 2,000 pounds over the axle limit.¹
Wheel weight violations run $100 base plus $100 for every 200 pounds (or part thereof) more than 200 pounds over the wheel limit.¹

If a single truck triggers more than one type of weight violation at once, Pennsylvania imposes only the penalty that produces the largest fine, not all of them stacked.¹ Even so, 10,000 pounds over gross reaches four figures easily before the doubling clause comes into play.

CDL Requirements

Pennsylvania issues commercial driver’s licenses in three classes, each requiring a minimum age of 18:

Class A covers any combination of vehicles with a gross combination weight rating of 26,001 pounds or more, where the towed vehicle is rated over 10,000 pounds.³
Class B covers any single vehicle rated at 26,001 pounds or more, or such a vehicle towing a trailer rated at 10,000 pounds or less.³
Class C covers vehicles that don’t meet the Class A or B thresholds but require hazardous materials placarding or carry 16 or more passengers.³

Eighteen-year-olds can drive commercially within Pennsylvania, but interstate operation requires a driver to be at least 21.³

Entry-Level Driver Training

First-time Class A or Class B applicants must complete entry-level driver training from a provider listed on the FMCSA Training Provider Registry. Training covers classroom theory plus behind-the-wheel range and public-road instruction, and both portions must be completed within one year of each other.⁴ Drivers who held a CDL before February 7, 2022, are grandfathered.⁵

Medical Card and Self-Certification

Every CDL holder needs a valid Medical Examiner’s Certificate from a provider on the FMCSA’s National Registry. Results are transmitted electronically to PennDOT.⁶ Separately, every CDL holder must submit self-certification form DL-11CD declaring the type of operation: non-excepted interstate, excepted interstate, non-excepted intrastate, or excepted intrastate. That classification determines whether a medical card must be on file with PennDOT.⁷ Letting either lapse can downgrade the CDL to a non-commercial license.

Drug and Alcohol Clearinghouse

Employers must query the FMCSA Drug and Alcohol Clearinghouse before putting any CDL driver in a safety-sensitive position, then run at least an annual query on every CDL driver on payroll. If a limited annual query returns a hit, the employer has 24 hours to run a full query or pull the driver from safety-sensitive duties until the full results arrive.⁸

Hours of Service

Federal hours-of-service rules under 49 CFR 395.3 apply to every commercial driver operating in Pennsylvania. For property-carrying vehicles:

11 hours of driving after 10 consecutive hours off duty.⁹
All driving must fit inside a 14-consecutive-hour window from coming on duty. Once 14 hours pass, no more driving until a full 10-hour break, regardless of unused driving time.⁹
After 8 cumulative hours of driving, a driver must take at least 30 consecutive minutes off duty, in the sleeper berth, or on duty but not driving.⁹
Weekly cap of 60 hours on duty over 7 consecutive days, or 70 hours over 8 consecutive days if the carrier operates every day of the week.⁹

Drivers can reset the weekly clock with 34 consecutive hours off duty or in the sleeper berth.

Most drivers must log hours on an electronic logging device. The short-haul exemption lets drivers use timecards instead if they operate within 150 air miles of their normal reporting location, return and are released within 14 hours, and stay under the weekly limits. Blow past either the 150-mile radius or the 14-hour window more than 8 times in any 30-day period and the exemption is lost.

Registration and Fees

Titling a commercial vehicle in Pennsylvania starts with the MV-1 Application for Certificate of Title. The form asks for the VIN and the gross vehicle weight rating assigned by the manufacturer, usually on the VIN plate.¹⁰ Accurate axle configuration data matters because it drives the weight class, which drives both registration fees and the legal load.

Registration fees scale with gross weight. Representative annual rates from PennDOT’s schedule:

Class 1 (5,000 lbs or less): $82
Class 8 (21,001–26,000 lbs): $705
Class 14 (44,001–48,000 lbs): $1,308
Class 20 (68,001–73,280 lbs): $2,178
Class 25 (79,001–80,000 lbs): $2,935

Two-year registrations are available at double the annual fee, though apportioned and fleet-registered vehicles aren’t eligible for two-year terms.¹¹ Farm trucks pay significantly lower rates across all classes.

Interstate Carriers

If the truck travels in two or more states, it likely needs apportioned registration under the International Registration Plan instead of a standard Pennsylvania plate. IRP applies to power units with a gross or registered weight over 26,000 pounds, vehicles with three or more axles regardless of weight, or any combination over 26,000 pounds gross. The apportioned cycle runs June 1 through May 31. New carriers with no travel history pay first-year fees based on Pennsylvania’s average-per-vehicle-distance chart.¹²

Interstate carriers hauling freight also register annually under the Unified Carrier Registration program. Fees start at $46 for carriers with two or fewer power units and climb to $44,836 for fleets over 1,000 vehicles.

Special Hauling Permits

Any vehicle or load past Pennsylvania’s standard size or weight limits needs a special hauling permit from PennDOT. The general application is Form M-936A.¹³ It asks for gross weight, individual axle weights, total length, width, height, load type, and the proposed route.

The fastest route is PennDOT’s Automated Permit Routing and Analysis System (APRAS), available around the clock. APRAS checks the proposed route for clearance issues and structural restrictions, and if the route clears, the permit is issued electronically.¹³ The driver must carry the permit during transport. Moving an oversize or overweight load without one exposes the owner, lessee, and driver to summary criminal proceedings.¹

Insurance Minimums

Federal law sets the liability floor. For-hire carriers of non-hazardous freight with a gross vehicle weight rating of 10,001 pounds or more must carry at least $750,000 in bodily injury and property damage coverage. Carriers operating vehicles under 10,001 pounds need at least $300,000.¹⁴ Hazardous materials carriers face substantially higher requirements.

Coverage is filed with FMCSA on Form BMC-91 for standard insurance, BMC-91X for self-insurance, or BMC-82 for a surety bond.¹⁴ The $750,000 is a floor, not a ceiling. Many shippers and brokers won’t tender freight until a carrier shows $1 million or more, and posted-road work triggers the additional bond and insurance layer described above.

Annual Inspection and Vehicle Marking

Every commercial vehicle in Pennsylvania must pass an annual safety inspection under 67 Pa. Code Chapter 175. Certified technicians check brakes, steering, lights, tires, and exhaust, and a passing vehicle receives a Pennsylvania Certificate of Inspection.¹⁵ Air brakes are the leading reason trucks get taken out of service at roadside checks: an over-stroke pushrod, an audible air leak, a bulging hose, or heat-damaged tubing all trigger out-of-service orders.

Federal law separately requires every commercial motor vehicle to display the carrier’s legal name (or a single trade name) and its USDOT number on both sides, in lettering that contrasts sharply with the background and reads from 50 feet away in daylight. If a name other than the operating carrier’s appears on the truck, the carrier name must be preceded by “operated by.”¹⁶ Missing or illegible markings draw citations at roadside inspection.

1
Pennsylvania General Assembly. Pennsylvania Consolidated Statutes Title 75 – Vehicles Chapter 49 – Size, Weight and Load
2
PennDOT. Posting and Bonding Procedures for Municipal Roadways
3
Commonwealth of Pennsylvania. License Types and Restrictions
4
eCFR. 49 CFR Part 380 Subpart F – Entry-Level Driver Training Requirements
5
Federal Motor Carrier Safety Administration. Entry-Level Driver Training
6
Commonwealth of Pennsylvania. Self-Certification and Medical Examiners Certification FAQs
7
Pennsylvania Department of Transportation. Self-Certification and Medical Examiners Certification Fact Sheet
8
eCFR. 49 CFR Part 382 – Controlled Substances and Alcohol Use and Testing
9
eCFR. 49 CFR 395.3 – Maximum Driving Time for Property-Carrying Vehicles
10
Pennsylvania Department of Transportation. Instructions for Completing Form MV-1 Application for Certificate of Title
11
Pennsylvania Department of Transportation. Bureau of Motor Vehicles Schedule of Fees
12
Commonwealth of Pennsylvania. Apportioned Registration Program
13
Commonwealth of Pennsylvania. Apply for a PennDOT Hauling Permit
14
Federal Motor Carrier Safety Administration. Insurance Filing Requirements
15
Pennsylvania Code. 67 Pa Code Chapter 175 – Vehicle Equipment and Inspection
16
eCFR. 49 CFR 390.21 – Marking of Self-Propelled CMVs and Intermodal Equipment