Department of Transportation
DOTD
Louisiana • United States of America
The Louisiana Department of Transportation and Development (DOTD) manages more than 16,000 miles of state highways and approximately 13,000 bridge structures in a state shaped by its waterways, ports, and petrochemical industry. Key freight corridors include I-10, I-12, I-20, I-49, and US-90. Louisiana's Port of South Louisiana is the busiest port in the Western Hemisphere by tonnage, and DOTD's highway network supports the massive freight flows from oil refineries, chemical plants, and agricultural export terminals. The department administers oversize/overweight permits essential for the energy and construction industries, and provides the LA511 traffic system for commercial drivers.
| Official Website | https://www.dotd.la.gov/ |
|---|---|
| Data API | http://www.dotd.la.gov/Pages/default.aspx |
| Founded | 1910 |
| Headquarters | New Orleans |
Available Data
Social Media
- @NOLA_Traffic — New Orleans Traffic
Louisiana Trucking Regulations
Size & weight limits, OS/OW permits, and seasonal restrictions for commercial vehicles
Weight Limits
| Category | Limit |
|---|---|
| Max Gross Vehicle Weight | 88000 lbs |
| Single Axle | 22000 lbs |
| Tandem Axle | 44000 lbs |
Dimensional Limits
| Category | Limit |
|---|---|
| Max Height | 14 ft |
| Max Width | 8.5 ft |
| Max Length (Single Unit) | 40 ft |
| Max Length (Combination) | 65 ft |
OS/OW Permits
Weigh Station Bypass
20¢/gal
Member
Special Exemptions
Notable Rules
Louisiana allows higher GVW (88,000 lbs) and axle weights (22,000 lbs single, 44,000 lbs tandem) on state-maintained highways. Interstate limits follow federal standards. Port of New Orleans and Port of South Louisiana are among the busiest ports in the Western Hemisphere by tonnage. Bayou-area bridges have variable weight ratings — verify clearances before routing. Flooding from Gulf storms can close I-10 and coastal routes.
Sources
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