Delaware Oversize Load Permits, Regulations & Axle Rules

Delaware is a small state. Most permitted moves cross it in a few hours. But its travel rules carry a few wrinkles that catch carriers off-guard.

Standard single-trip permits (oversize and overweight) travel Monday through Sunday, sunrise to sunset. Night movement is available with prior approval, not automatically: loads that stay at or under 75 feet long, 12 feet wide, 14'6" high, and 120,000 lbs may request a 9:00 PM to 5:00 AM window Monday through Friday. Loads above any of those thresholds stay daylight-only. Delaware does not prohibit permitted travel on weekends as a general rule, though seasonal restrictions and superload timing guidance narrow weekend options in certain corridors.

Seven holidays are full travel blackouts: New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving, the day after Thanksgiving, and Christmas. The day-after-Thanksgiving addition is less common among states and can squeeze planning windows around the Thanksgiving stretch. The admin code states loads "shall be prohibited from traveling on those days" and refers exact timing to the DelDOT OSOW Permit System; specific blackout hours at the holiday boundary aren't separately enumerated in the regulations. Superloads face an additional bar: they may not travel on any holiday or during special events without special written permission from the Department.

Delaware doesn't impose rush-hour curfews by name, but superload guidance functions like one: loads carrying superload-level dimensions or weight are directed to avoid 6:00 AM to 9:00 AM and 3:00 PM to 7:00 PM for most types (more detail in the Superload section). There's also a seasonal beach-corridor restriction affecting the state's main north-south arteries from May 15 through October 1: any oversize or overweight vehicle that can't maintain posted highway speed within 10 mph is prohibited from moving between noon Friday and noon Monday on I-95, I-295, I-495, US 13, SR 1, and a set of Kent and Sussex County routes including US 9, US 113, SR 1, SR 18, SR 24, SR 26, SR 54, and SR 404. For a slower-moving load, that's effectively a long weekend blackout during the entire summer tourism season.

Weather halts movement without a specific visibility threshold stated: permitted vehicles are not authorized to operate when road conditions, visibility, or unfavorable weather make travel hazardous, and the driver must exit at the first safe location. Delaware does not specify a minimum visibility distance.

Several permit categories are authorized for 24-hour continuous movement Monday through Sunday: sealed containers, ship offloading permits, pole and piling multi-trips, both Interstate permit types, blanket cranes, twin trailers, zero emission buses, and refrigerated meat products.

Delaware recognizes several commodity categories with distinct dimensional or operational treatment.

Non-divisible loads impossible of dismemberment, pilings, poles, mill logs, nursery stock, rowing shells, steel beams, pipes, angles, channels, and other steel or metal articles, get two layers of relief. First, on non-Interstate/US routes, these loads may reach 70 feet overall (versus the 60-foot general combination limit for other non-standard combinations). Second, they may extend up to 10 feet of rear overhang beyond the body of the vehicle, compared to the standard 6-foot cap. These are statutory allowances, not discretionary.

Poles, piling, and mill stock specifically move under a 30-day multi-trip permit (Load Code 7) at $30.00, with 24-hour continuous travel allowed Monday through Sunday.

Rowing shells for interscholastic or intercollegiate competition are exempt from the general length-of-load restrictions entirely, provided the boat itself does not exceed 70 feet. This is a blanket length exemption, not a dimensional permit.

Self-propelled cranes can obtain an annual blanket permit (Load Code 11) covering up to 70 feet long, 12 feet wide, and 13'6" high, with maximum weights of 56,000 lbs on two axles, 84,000 lbs on three, 112,000 lbs on four, and 120,000 lbs on five or more axles (max single axle: 28,000 lbs). Cranes under blanket travel 24 hours a day, Monday through Sunday, with one significant limitation: Interstate travel is not permitted under the blanket. A separate single-trip permit is required for any Interstate movement. Superloads are never eligible for a blanket. Crane certification, confirming weight with a full fuel tank and driver aboard, must be completed by appointment at either the Smyrna (Blackbird) or Middletown (301) Weigh Station by Delaware State Police Truck Enforcement Unit personnel.

Sealed ocean-going containers bearing a federal inspector's seal are treated as nondivisible loads for GVW up to 100,000 lbs and move under a 5-day permit with 24-hour continuous travel.

Motor vehicle transporters on non-Interstate/US routes may run up to 65 feet overall, exclusive of the overhang of any transported vehicles.

Farm tractors and implements of husbandry being temporarily operated or transported on state-maintained roads other than Interstate and US routes are exempt from the hauling permit requirement when operated by farmers in normal agricultural practice. Manufacturer, dealer, or commercial transport requires a permit.

Special construction equipment crossing or entering state-maintained highways in connection with a federal, state, county, or municipal contract does not require a permit for those moves within the contract limits.

Tow trucks recovering disabled or abandoned trucks, trailers, or combinations may operate without regard to length, weight, or width limitations.

Delaware does not offer a general annual blanket oversize/overweight permit. The specialized annual categories above, cranes, zero-emission buses, refrigerated meat products, and multi-trip Interstate, are the full extent of the annual permit catalog.

Delaware uses its own term, Superload, and defines it precisely. A load crosses into the Superload tier the moment it meets any one of four conditions: 15 feet or more in width; 15 feet or more in height; 120 feet or more in overall length; or gross weight in excess of 120,000 lbs. The first three use inclusive "or more" operators, the fourth uses exclusive "in excess of": a load at exactly 120,000 lbs is not a Superload on weight alone, but one at 120,001 lbs is. That distinction matters for borderline loads.

Delaware further categorizes Superloads by which dimension triggers the tier: Type 1 is length only, Type 2 is width only, Type 3 is height only, Type 4 is GVW only, and Type 5 is any combination of two or more characteristics. The type drives both the required review time and the travel conditions imposed.

Review lead times are real. Type 1 (length) takes approximately 5 business days. Types 2, 3, and 4 each take roughly 10 business days. Type 5 combination loads can take up to 14 business days. Filing at the last minute for a Superload is not an option.

The permit fee starts at $60.00 base plus $10.00 per 8,000 lbs (or portion) over legal weight. Beyond that, all ancillary costs, route survey, bridge analysis, utility relocation, vegetation clearing, traffic control, and bridge enhancements, come back to the hauler in full.

Permits run 1 to 5 business days, Monday through Saturday, and DelDOT may limit the duration to the actual move timeframe based on route conditions.

Travel windows by type: Type 1 moves sunrise to sunset, Monday through Sunday with no peak-hour guidance. Types 2, 3, and 5 also operate sunrise to sunset, Monday through Sunday, but should avoid 6:00 AM to 9:00 AM and 3:00 PM to 7:00 PM. Type 4 (weight-only) may operate within those peak windows if it can maintain continuous travel speed within 10 mph of the posted limit; otherwise it follows the same avoid-rush-hours guidance Monday through Friday. Type 5 loads through beach resort areas from May 15 through October 1 are recommended to move only Tuesday through Thursday, outside those same peak windows.

No Superload may travel on holidays or during special events without special written permission from the Department, submitted in writing.

Engineering and bridge review: all permits exceeding 120,000 lbs GVW, or routing across any structure posted below the proposed movement weight, must be processed and approved by the DelDOT Bridge Management Section. Automatic bridge review also triggers on individual axle weights at or above 25,000 lbs; it can be initiated below that threshold case by case.

For height Superloads (Type 3 and Type 5 with height): permit requests at 15 feet or greater in height are routed to the DelDOT Signal Supervisor in the affected county for review before the permit can be approved. The hauler must contact the appropriate county Signal Supervisor directly (New Castle County: 302-326-4589; Kent/Sussex Counties: 302-739-4366).

Route surveys are required for Superload moves and are not a quick formality. The formal package is HP Form 16 (the route survey itself) plus HP Form 17 (Delaware's Superload Gate-Keeping Checklist). The survey must be completed no more than 14 business days before the move date, not merely submitted, but completed within that window.

Whether a survey is required depends on the Superload type. Type 5 (combination) normally requires one. Types 2 and 3 may require one for extreme width or height dimensions. Types 1 and 4 do not normally require a survey, though DelDOT may request one upon review.

The survey must demonstrate specific clearances, not just general feasibility. For height: no portion of the movement may come within 6 inches of any overhead object. For width: no portion may come within 3 to 6 inches of any lateral object. The survey must also confirm that a single uninterrupted movement can occur along the entire intended route and that no posted roadway or bridge weight limits would be exceeded.

For height-heavy loads (Types 3 and 5), utility coordination is a separate, mandatory step: written confirmation from every utility company serving the route must reach DelDOT before the permit can be approved. A DelDOT Traffic-approved electrical contractor may be required to adjust or temporarily remove traffic signals. Vegetation clearing, any tree limbs along the route, requires a Delaware-certified arborist. Overhead wires, cables, signals, and traffic lights may not be disturbed without written permission from their owners.

All costs for the route survey, utility coordination, vegetation clearing, traffic control, and any necessary bridge enhancements are borne by the hauler. The permit will not issue until the coordination is complete.

Delaware also maintains a set of permanent route restrictions: certain roads are limited to vehicles with destinations inside defined areas (loads up to 120,000 lbs GVW). Through movements on those routes require individual analysis; carriers should budget approximately two additional business days for that review.

The route survey is a precondition for the Superload permit to issue, not a post-approval step.

Delaware State Police (DSP) is the law enforcement agency for oversize/overweight escorts. The breakpoints between civilian pilots and DSP are codified, not discretionary.

DSP becomes a mandatory third escort, in addition to the two civilian pilots, when any of these thresholds are met: width 15 feet or more; overall length 120 feet or more; height 17'6" or more; or a load qualifies as a Superload on any dimension or weight trigger. Civilian pilot-only configurations handle the range below those levels.

The full civilian pilot structure is tiered by dimension. For width: a load more than 13 feet wide but not exceeding 14 feet needs one pilot, positioned to the rear on multilane roads, to the front on two-lane roads. Width over 14 feet brings both a front and rear pilot. Once a load reaches 15 feet wide or more (Superload territory), that pair is joined by DSP. For length: a load 90 feet or more in overall length gets one rear pilot; 100 feet or more brings front and rear; at 120 feet the DSP requirement kicks in. For height: Delaware jumps straight to front-and-rear pilots at 15 feet; there's no single-pilot height tier. At 17'6", DSP joins. A rear overhang of 15 feet or more on any permit requires one rear pilot, unless the permit specifies otherwise.

All Superload moves carry the full package: one front pilot, one rear pilot, and at least one DSP trooper in a patrol car. The one exception is the weight-only Type 4 Superload, where DSP participation is determined by the physical characteristics of the load or known assets along the route; it may or may not be required.

DSP must receive a minimum of 48 hours' advance notice before any Superload move. Separately, the hauler must notify both the local 911 office (via non-emergency number) and the DelDOT Traffic Management Center at least one hour before the move begins, and again on arrival at the destination or on clearing the state. If a load is wide enough that passing by queued traffic cannot occur, DSP will require enough officers to divert traffic at reasonable intervals.

One DSP escort unit may cover two or more loads in a single convoy provided the loads move simultaneously, all other required pilots are in place, and communication links the individual drivers. Scheduling DSP through the permit process is expected: DelDOT coordinates with the state police as part of the Superload approval workflow.