Delaware commercial vehicle weight limits follow the federal Interstate standard of 80,000 lbs gross, 20,000 lbs per single axle, and 34,000 lbs per tandem axle group. The federal bridge formula (23 U.S.C. 127) applies on all routes. No seasonal weight restrictions on Interstate highways. Oversize and overweight permits are available from DE DOT for loads exceeding standard limits. Verify current road-specific postings with the Delaware DOT before routing heavy loads.
The federal bridge formula limits the weight on any group of axles based on the distance between the outermost axles in the group. It applies in Delaware on all routes where federal standards apply.
W = maximum weight in lbs · L = axle spacing in feet · N = number of axles
DelDOT issues oversize/overweight permits for loads exceeding standard limits. Apply through the DelDOT permit office. Single-trip permits for one-time movements. Annual permits for qualifying routine operations. Loads crossing the Delaware Memorial Bridge require additional coordination with the Delaware River and Bay Authority (DRBA). Delaware's small geographic area means most permits involve movements that cross state borders into Pennsylvania, Maryland, or New Jersey — coordinate with neighboring states as needed.
Apply for Delaware OS/OW Permit →On Delaware Interstate highways, the maximum gross vehicle weight is 80,000 lbs — matching the federal standard. Delaware state routes and secondary roads may have lower posted limits. Overweight permits from DelDOT are required for loads exceeding standard limits.
No. Delaware does not impose seasonal spring weight restrictions on its highway system. The state's moderate Mid-Atlantic climate and limited secondary road network mean spring thaw damage is not a significant issue compared to Northern New England and Midwest states.
The Delaware Memorial Bridge (twin spans on I-295 and US-40) has specific weight posting that may differ from standard highway limits. Overweight loads crossing the bridge require coordination with both DelDOT and the Delaware River and Bay Authority (DRBA). Contact DRBA directly or check with DelDOT's permit office for current bridge weight limits before routing oversized loads.
DelDOT issues oversize/overweight permits through its permit office at deldot.gov. Apply for single-trip or annual permits as appropriate. For loads crossing the Delaware Memorial Bridge, coordinate with the Delaware River and Bay Authority. Delaware's small size means many overweight movements also require permits from neighboring states (Pennsylvania, Maryland, New Jersey) — plan accordingly.
Delaware's tandem axle limit is 34,000 lbs on Interstate highways — matching the federal standard. Tridem axle configurations are allowed up to 42,000 lbs. State routes may have lower limits — always observe posted signs. Delaware Memorial Bridge may have different weight specifications — verify before routing.
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Disclaimer
The information on this page is compiled from publicly available government sources and is provided for general informational purposes only. TruckRadar is an independent search engine — we are not affiliated with any government agency and this content does not constitute legal or compliance advice. Regulations change frequently; always verify current requirements directly with the official source before making compliance decisions.
Official source: Delaware DE Department of TransportationLast reviewed: 2026-04