Alabama trailer laws for towing in 2026
Brake threshold, size limits, lighting rules, and what Alabama requires for trailers under Alabama Code Title 32 Chapter 9.
Alabama’s trailer rules sit in the middle of the pack: brakes required at 3,000 lb gross weight, 65 ft maximum combination length, 102 in max width on designated highways, 13 ft 6 in max height. Trailers under 20 years old need a state title. The detail and the statute numbers are below.
| Rule | Threshold |
|---|---|
| Brakes required on trailer | 3,000 lb GVWR or more (Ala. Code 32-9-20) |
| Breakaway system | Required on any trailer that needs brakes |
| Max combination length | 65 ft (truck plus trailer) |
| Max trailer length alone | 40 ft (including bumpers) |
| Max width | 96 in standard, 102 in on designated highways |
| Max height | 13 ft 6 in |
| Special permit | Loads over 10,000 lb gross, house trailers over 40 ft or 8 ft wide |
| Title required | Travel trailers and folding/collapsible trailers less than 20 years old |
Registration and title
Travel trailers and folding/collapsible trailers less than 20 years old need an Alabama certificate of title. Manufactured motor homes from model year 2000 or newer must also be titled. Utility trailers under 20 years old generally need a registration tag, but title rules vary by trailer type and weight.
Loads over 10,000 lb gross need a special permit through the Alabama DOT.
Size limits (Ala. Code 32-9-20)
- Combination length: 65 ft max for any tow vehicle plus trailer combination.
- Trailer length: 40 ft maximum, bumpers included.
- Width: 96 in (8 ft) on most roads. Designated highways allow 102 in (8 ft 6 in) without a permit.
- Height: 13 ft 6 in including any load.
A house trailer over 40 ft long or 8 ft wide needs a state permit to use Alabama roads at all.
Brakes and connections
Trailers with a gross weight of 3,000 lb or more must have brakes that can stop and hold the trailer, applied automatically if the trailer breaks away from the tow vehicle. That’s the breakaway requirement most states share.
The drawbar or rigid connection between the tow vehicle and the trailer can’t exceed 15 ft.
For oversize loads requiring a flag, red flags must be at least 12 in by 12 in.
Towing restrictions
- One trailer at a time behind a passenger or pleasure vehicle. No doubles for non-commercial use.
- No riding in or on a trailer being towed.
- Brake lights and turn signals on the tow vehicle must work through to the trailer. If the trailer blocks the truck’s lights, the trailer’s own lights have to take over.
Lighting requirements
Every trailer, pole trailer, or semi-trailer towed on a public highway must have:
- At least one tail lamp on the rear, visible from 500 ft, mounted 20 to 60 in above the ground
- Stop lamps and turn signals
- Two reflectors on the rear (one on each side) for trailers under 3,000 lb GVW
- Side markers and clearance lights for larger trailers
If the towed trailer obscures the tow vehicle’s brake lights or turn signals, the trailer must have functioning lights that mirror what the truck would show.
Speed limits while towing
Alabama doesn’t post a separate towing speed limit. You follow the posted speed limit, but you can be cited if your speed is making the trailer unsafe. If you’re at 70 mph on a freeway and the trailer is starting to sway, an officer can pull you over for unsafe operation even though you’re at the posted limit.
Mirrors
Standard rear-view mirrors on both sides of the tow vehicle are required. If the trailer width blocks your view, extension mirrors or clip-on tow mirrors are an easy fix and avoid an unsafe-equipment ticket.
What to do if you tow into Alabama from another state
If your trailer is registered and legal in your home state, Alabama will generally honor that registration for non-commercial use. Same for the brakes and lighting rules under federal interstate norms (49 CFR 393). But if you’re carrying a load that requires an Alabama permit (oversize, overweight, or over 10,000 lb gross on certain configurations), get the permit before crossing the line.
A note for Ford owners in 2026
If you tow a 2021 to 2026 F-150, 2022 to 2026 Super Duty, 2024 to 2026 Ranger, 2022 to 2026 Expedition, 2022 to 2026 Maverick, 2022 to 2026 Lincoln Navigator, or 2026 Transit, check whether recall 26C10 (NHTSA 26V104000) has been completed. It’s an Integrated Trailer Module software fault that can knock out trailer stop lamps, turn signals, and electric trailer brakes at startup. Driving with non-functioning trailer brake lights is a violation in Alabama regardless of where the fault originates. The OTA fix started rolling out in May 2026.