Single-20,000; Tandem-34,000; Tridum-42,500;80,000 maximum gross
The maximum allowable vehicle width in Maryland is 102 inches, except where prohibited by posted signs. The width of a vehicle includes any load that it carries, 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, see Title 24, Subsection 102 of the Maryland Vehicle Law.
Over 102 inches wide requires a permit. Any load extending more than 4 inches beyond the sides of any transport vehicle requires lamps and flags.
The vehicle and load height limit in Maryland is 13 feet 6 inches.
14’6” in height requires a pole vehicle and route survey before a permit will be issued.
The length of a vehicle includes its front and rear bumpers and any part of its load that extends beyond the vehicle but excludes non-load bearing safety and energy conservation devices, front-mounted refrigeration units, and front-mounted air compressors. Refer to the Maryland Vehicle Law Title 24, subsection 104.1 for a list of vehicle length limits in Maryland. Indivisible loads over 70’ require a permit. Pilings, poles and mill logs exceeding 75’ require a permit. Indivisible loads up to 70’ may be moved during daylight hours without a permit on a combination vehicle.
Semi-trailers over 48’ but not over 53‘ are allowed on interstates and the Maryland truck route system. Pickup or delivery on local roads must be the closest practicable distance from an authorized route.
Load extensions- Max front 3’ Max rear 6’ (except for indivisible cargo). Flags and lamps are required beyond 4’ of rear overhang.
WEIGHT: Single-27,000; Tandem-52,000; Tridum-63,000; WEIGHT: LENGTH: 120’ WIDTH: 16’ HEIGHT: 16’ POLECAR: 14’6” POLICE & PRIVATE ESCORTS REQUIRED
Day moves are permitted 9:00 a.m.-3:30 p.m.; night moves can be done from 8:00 p.m.-6:00 a.m. (see Code of Maryland Regulations COMAR 11.04.02.06) Travel is prohibited on the following: New Year’s Day, Good Friday, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, and Christmas Day. The MDOT SHA Permit Office is closed on the above-mentioned holidays, as well as Martin Luther King Day, Columbus Day, Election Day, and the day after Thanksgiving, but travel is not restricted on these additional days (see Holiday Restrictions).
Superload applications require an engineering review. Once the application is approved, you must activate the permit by opening the seed application and entering the driver's name and phone number, then resubmitting the application for final approval.
Moves for loads up to and including 150k GVW, 13’ wide, 14’6” high, 90’ long may move 24/7. All other loads are one-half hour after sunrise and one-half hour before sunset. No Sunday travel is permitted.
The permittee or user may move any vehicle 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.-3:30 p.m. on any highway.
Travel is prohibited on the following: New Year’s Day, Good Friday, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, and Christmas Day. The MDOT SHA Permit Office is closed on the above-mentioned holidays as well as on Martin Luther King Day, Columbus Day, Election Day, and the day after Thanksgiving, but travel is not restricted on these additional days. (See Holiday Restrictions).
“Wide Load” or “Oversize Load” signs are required if the vehicle and load exceeds 9’ in width, front and rear. The sign must appear in black letters not less than 10” high, with a brush stroke not less than 1 5/8” wide. The letters must appear on a yellow background, 18” high and 7’ wide on the front and rear of vehicle load. You must display 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; two red lights must be displayed on a rear overhang exceeding 4’ indicating the widest part of the overhang and one on each side of the load.
One escort must be provided for a permit move on any highway in the State if the permit move is:
Two escorts. The permittee shall provide two escort vehicles for a permit move if the permit move is:
The permittee must provide for police escort for any permit move that is 16’ wide or more, 75 tons gross weight or more, or the road or weather condition justify, or traveling against traffic may require two escort vehicles.
Far RIGHT toll lane MUST be used at all toll plazas. Toll facilities MUST be contacted at least one hour prior to arrival. If the lane is closed, pull up and wait - MDTA will open for you. DO NOT proceed until authorized. Loads may not go through other toll lanes.
JFK Memorial Highway - I-95 - (410) 537-1150Ft. McHenry Tunnel - I-95 - (410) 537-1230Francis Scott Key Bridge I-695 -(410) 537-7600 (ALL Wide loads must use the Far Right Lane)Chesapeake Bay Bridge US 50/301 - (410) 537-6601Potomac River Bridge (Nice Bridge) – US 301 - (410) 537-6800Hatem Bridge - (410) 537-1197
707 North Calvert Street
Baltimore, Maryland 21202-3601
Main Business Line – 410-545-0300
Safety Campaigns – 1-800-323-6742
For emergencies, call MDOT SHA's Statewide Operations Center at 410-582-5650.
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