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Maryland Department of Transportation
State Highway Administration
Permit Information


WEIGHT: Single-27,000; Tandem-34,000; Tridum-42,500; WEIGHT: 120,000 to 150,000 interstate only; 30,000 lbs, per axle is the maximum - Super Loads. LENGTH: 120’ WIDTH: 16’ HEIGHT: 16’ POLECAR: 14’6”


“Wide Load” or “Oversize Load” signs are required if the vehicle and load exceeds 9’ in width, front and rear. The sign shall appear in black letters not less than 10” high, with a brush stroke not less than 1 5/8” wide. The letters shall appear on a yellow background, 18” high and 7’ wide on the front and rear of vehicle load. Red or orange fluorescent flags during daylight hours at least 18” square fastened by at least one corner on a staff placed at the widest extremities instead of flags, 2 red lights shall be displayed on a rear overhang exceeding 4’ and 1 on each side of the load.


One escort shall be provided for a permit move on any highway in the State if the permit move is: More than 13’ wide, unless the load is a manufactured housing unit; more than 85’ long; 14’6” high or more (pole vehicle required); More than 60 tons gross weight; construction equip. over 12’ wide traveling off the I-System or traveling when weather or road conditions justify the requirement of one escort vehicle. Two escorts. The permittee shall provide two escort vehicles for a permit move if the permit move is: 14’ wide or more including a load that is a manufactured housing unit; 140’ long or more. The permittee shall provide for police escort for any permit move which is 16’ wide or more in excess of 65 tons gross weight or the road condition or weather condition or road to narrow or traveling against traffic it may require 2 cars. (see COMAR 11.04.02)


Must have two-way radio contact and maintain constant communication. A private escort must have at least one oscillating or rotating roof light, yellow in color, at least 3” in diameter and visible from the front and rear. Headlights shall be on while conducting the move. Escort vehicle shall display a sign on the roof of the vehicle at least 5’ long, 12” high, letters 8” high. (see COMAR title 11.04.01 )


One-half hour after sunrise and one-half hour before sunset. Saturday until 12:00 noon . No Sunday travel. CURFEW: The Permittee or user may moveanyvehicle and load that together exceeds 45 tons gross weight or is 100’ or more in length or 12’ or more in width over I-495 and I-95 (Capital Beltway) or I-695 (Baltimore Beltway) from 9:00 a.m. to 3:30 p.m. If 14’ wide or more, 9:00 a.m. to 3:30 p.m. on any highway. Maryland has many toll, bridge, and tunnel restrictions make sure you contact the toll facility before you make your move. For further information call Permit Office 1-800-846-6435 . Curfew restrictions will be noted on your permit.


Day moves 9:00am – 3:30 pm; Night moves can be 7:00pm to 6:00am (see COMAR Title Travel is prohibited on the following: New Year’s Day, Good Friday, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, and Christmas Day. The State Permit Office will be closed on the above-mentioned holidays as well as Martin Luther King Day, Columbus Day, Election Day, and the day after Thanksgiving, but travel will not be restricted on these additional days. (see Holiday Restrictions)


If your dimensions exceed any of these limits, a permit is required.


Single-27,000; Tandem-34,000; Tridum-42,500; WEIGHT: 120,000 to 150,000 interstate only; 30,000 lbs, per axle is the maximum –

No more than 30,000 lbs on any one axle Up to 110,000 lbs gvw;

No more than 27,000 lbs on any one axle From 110,001 lbs gvw and over;

Super Loads. LENGTH: 120’ WIDTH: 16’ HEIGHT: 16’ POLECAR: 14’6.”


The maximum allowable vehicle width in Maryland is 102 inches except when prohibited by posted signs. The width of a vehicle includes any load that it carries and shall be exclusive of safety and energy conservation devices, such as side mirrors, turn signal lamps, marker lamps, steps and handholds for entry and egress. For a detailed description of the Maryland vehicle width law, refer to Title 24, Subsection 102 of the Maryland Vehicle Law.

9’ ft and over requires permit;

Super Loads- 16’ ft.


The vehicle and load height limit in Maryland is 13 feet 6 inches.

14’6” in height requires a pole vehicle.


The length of a vehicle includes its front and rear bumpers and any part of its load that extends beyond the vehicle, but is exclusive of non-load bearing safety and energy conservation devices, such as marker lamps, steps and handhold for entry and egress, front-mounted refrigeration units, and front-mounted air compressors. Refer to the Maryland Vehicle Law Title 24, subsection 104.1 for a list of the different vehicle length limits in Maryland.

53‘ ft trailers allowed on all interstate / truck route access.

Overhang allowed 3’ ft in front, 6’ ft in rear.

One mile allowed off for food, fuel, rest or shortest practical route to destination.

Super Loads- 16’ ft

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Revised: June 18, 2008