Trucking Regulations in Alabama
Complete guide to weight limits, speed limits, permits, chain laws, and special rules for commercial truck drivers operating in Alabama.
Max Gross Weight
80,000 lbs federal limit
Truck Speed Limit
70 mph (same as cars)
Diesel Tax
$0.29 per gallon diesel (state) + federal
Weight & Size Limits in Alabama
| Measurement | Limit |
|---|---|
| Max Gross Vehicle Weight | 80,000 lbs federal limit |
| Max Axle Weight | 20,000 lbs single axle, 34,000 lbs tandem |
| Max Trailer Length | 53 ft trailer, 65 ft overall |
| Max Width | 102 inches |
| Max Height | 13'6" |
Speed Limits for Trucks in Alabama
Rural Interstate
70 mph
Urban Interstate
55 mph
Truck-Specific
70 mph (same as cars)
Fuel Tax & Tolls in Alabama
Diesel Fuel Tax
$0.29 per gallon diesel (state) + federal
Toll Roads & Bridges
No toll roads. The proposed I-10 Mobile River Bridge toll project remains under debate.
Chain Laws & Weather Requirements
No chain law. Chains rarely needed; occasional ice events in northern counties.
Oversize & Overweight Permits
Single-trip and annual permits via ALDOT. Apply online at aloversize.com or by phone. Permits required for loads over 80,000 lbs or exceeding dimensional limits.
Port of Entry & Weigh Stations
Weigh stations on major interstates (I-65, I-20/59, I-10). PrePass accepted at most locations.
Special Rules for Alabama
Hazmat Route Restrictions
Hazmat restricted through Bankhead and Wallace Tunnels in Mobile. Designated routes around Birmingham and Huntsville metro areas.
Rest Area & Parking Rules
Rest areas allow overnight parking up to 10 hours. No specific anti-idling law at state level.
DOT Inspection Frequency
Moderate inspection frequency. Alabama participates in CVSA International Roadcheck annually. Random inspections at weigh stations.
Looking for Trucking Jobs in Alabama?
Browse CDL driver positions and connect with carriers operating in Alabama.
Frequently Asked Questions About Alabama Trucking Regulations
What is the maximum truck weight allowed in Alabama?
Alabama follows the federal 80,000 lbs gross vehicle weight limit on interstate highways. Timber haulers can obtain permits allowing up to 84,000 lbs on designated state routes. Single axle limit is 20,000 lbs and tandem axle is 34,000 lbs.
Are there toll roads in Alabama?
Alabama currently has no toll roads or toll bridges for commercial vehicles. The proposed I-10 Mobile River Bridge project has been debated but not implemented as of 2026.
What is the truck speed limit in Alabama?
Trucks in Alabama have the same speed limits as passenger vehicles: 70 mph on rural interstates, 65 mph on four-lane divided highways, and 55 mph in urban areas. There is no separate lower truck speed limit.
Does Alabama require chains on trucks?
Alabama has no chain law. Snow and ice are rare but can occur in the northern tier. Carriers should be prepared for occasional winter weather in the Appalachian foothills near the Tennessee border.
How do I get an oversize load permit in Alabama?
Oversize and overweight permits are issued by ALDOT. Single-trip and annual permits can be obtained online at aloversize.com or by calling ALDOT's permit office. Escort vehicles may be required for extra-wide or extra-long loads.