LA state page · Last reviewed 2026-05-25
Louisiana Truck Weight Limits and Permit Sources Louisiana truck weight and permit source page with DOTD permit links and cautious status labels for fine and seasonal fields.
This page is a reference aid, not legal advice. Weight rules, permits, routes,
and penalties can change without notice; use the linked official source as the
final authority.
At-a-glance summary Field Value Source Status Confidence Gross Federal Interstate gross limit is 80,000 lb; Louisiana-specific limits are in the FHWA state law compilation linked here. inferred from official source medium Single axle Federal Interstate single-axle limit is 20,000 lb; Louisiana-specific limits are in the FHWA state law compilation linked here. inferred from official source medium Tandem axle Federal Interstate tandem limit is 34,000 lb; Louisiana-specific limits are in the FHWA state law compilation linked here. inferred from official source medium Bridge formula Federal bridge formula checks apply on Interstate routes; verify state exceptions and permit conditions before movement. inferred from official source medium Permit agency Louisiana Department of Transportation and Development confirmed high Seasonal / frost No official statewide seasonal or frost weight restriction was confirmed during this review. No confirmed official source Needs official confirmation
not found in official review low Fine source Louisiana Revised Statutes section 32:388 is the official source reviewed for penalties on excess size and weight. confirmed medium
Field-level reference data Regular weight limits Gross vehicle weight limit Federal Interstate gross limit is 80,000 lb; Louisiana-specific limits are in the FHWA state law compilation linked here. inferred from official source medium Single axle limit Federal Interstate single-axle limit is 20,000 lb; Louisiana-specific limits are in the FHWA state law compilation linked here. inferred from official source medium Tandem axle limit Federal Interstate tandem limit is 34,000 lb; Louisiana-specific limits are in the FHWA state law compilation linked here. inferred from official source medium Bridge formula applies Federal bridge formula checks apply on Interstate routes; verify state exceptions and permit conditions before movement. inferred from official source medium Interstate notes Use FHWA Interstate limits together with the state source and any permit conditions. inferred from official source medium Non-Interstate notes Use the reviewed state source and local postings for non-Interstate operation. inferred from official source medium
Axle and loading notes Steer axle notes Steer axle review should include axle law, tire/equipment ratings, registration, and route postings. inferred from official source medium Drive axle notes Drive axle groups should be checked against tandem/group limits and permit terms. inferred from official source medium Trailer tandem notes Trailer tandem position changes distribution and may affect spacing-sensitive checks; re-weigh after adjustment. inferred from official source medium Fifth wheel notes Fifth-wheel movement redistributes weight but does not create permit authority. inferred from official source medium Bridge law notes Check FHWA bridge formula and the state source when axle spacing is close to a limit. inferred from official source medium
Oversize / overweight permits Permit agency Louisiana Department of Transportation and Development confirmed high Permit office name DOTD Truck Permit Office confirmed high Official permit URL Louisiana DOTD truck permit source. confirmed high Online permit portal Use the DOTD permit source for current application or LaGeaux access. inferred from official source medium Permit contact Use DOTD permit office contact information on the official source. inferred from official source medium Permit notes Permit terms, route conditions, dates, and vehicle configuration should be checked on the official permit source before travel. inferred from official source medium
Seasonal and special restrictions Frost / seasonal restriction No official statewide seasonal or frost weight restriction was confirmed during this review. No confirmed official source Needs official confirmation
not found in official review low Seasonal weight notes Local route, bridge, or permit restrictions may still apply; no statewide seasonal weight restriction was confirmed in this review. No confirmed official source Needs official confirmation
not found in official review low Official seasonal URL No confirmed official source Needs official confirmation
not found in official review low
Fines and enforcement Overweight fine structure Louisiana Revised Statutes section 32:388 is the official source reviewed for penalties on excess size and weight. confirmed medium Overweight ticket notes Use RS 32:388, the citation, and any permit terms before estimating penalties. inferred from official source medium Enforcement agency Louisiana State Police Transportation Safety Services confirmed medium Fine official URL Official fine or penalty source linked in Sources. confirmed medium CSA / safety notes CSA impact depends on inspection and reporting; use FMCSA SMS materials and the actual inspection record. inferred from official source medium
Scale notes Public scale notes A public scale ticket is a self-check record, not state permit authority. inferred from official source medium Weigh station / enforcement notes Compare scale readings with official limits, route postings, and any permit terms. inferred from official source medium CAT Scale disclaimer CAT Scale tickets are private self-check records and do not replace official permits or enforcement decisions. inferred from official source medium Scale ticket notes Use steer, drive, trailer, and gross readings to compare against official limits before travel. inferred from official source medium
Louisiana has a distinctive weight law framework that includes state-specific axle rules and parish road weight limits, which can differ significantly from both the federal baseline and from each other. DOTD (Department of Transportation and Development) administers oversize and overweight permits; I-10 and I-20 carry major petrochemical, port, and through-freight traffic. The Port of New Orleans and the Lake Charles and Baton Rouge industrial corridor generate a high volume of heavy-haul permit applications, and parish road weight limits on access routes should be verified separately.
How to verify this yourself
Open the DOTD truck permit source before over-legal travel. Verify parish road weight limits for any route off the state highway system. Louisiana-specific axle rules should be confirmed with current Louisiana official sources before relying on the federal baseline.
FAQ Where should I verify Louisiana permit requirements? Use the official DOTD Truck Permit Office source linked on this page before moving over legal size or weight.
Are Louisiana seasonal restrictions fully confirmed here? No. This review did not confirm a statewide seasonal or frost source, so route and permit restrictions still need checking.
Do these weight values cover Louisiana state highways and parish roads? The values shown are the federal Interstate baseline. State-specific non-Interstate limits are in the FHWA state law compilation linked here and may differ from the baseline.