State comparison · Updated October 2026
Louisiana vs. Texas Driving Laws (2026)
Louisiana and Texas part ways on 6 of 9 rules we track: max speed limit, phone law, car insurance, car sales tax, car inspection and helmet law.
A drive from New Orleans to Houston takes you across the border, and 6 of the nine laws change on the way. Main routes are I-10 on the Louisiana side and I-35 on the side of Texas; the capitals, Baton Rouge and Austin, write the laws for their side.
The largest difference: top speed limits differ by 10 mph apart. Residents of Baton Rouge who travel to San Antonio, and back, deal with both rulebooks: Louisiana's on I-12 and Texas's once they cross on I-10. Read the Louisiana vs Texas guide when moving from New Orleans to Houston.
For a quick visit from Baton Rouge to Austin, keep your documents if you ride, plan the route before leaving, and expect a change from 75 to 85 mph after crossing.
| Topic | Louisiana | Texas |
|---|---|---|
| Max speed limit | 75 mph | 85 mph |
| Phone law | Hands-free law | Texting ban only |
| Learner's permit age | Permit at 15 | Permit at 15 |
| Car insurance | 15/30/25 | 30/60/25 |
| Car sales tax | 5% | 6.25% |
| Car inspection | Safety + emissions | Emissions only |
| New resident deadline | 30 days | 30 days |
| Helmet law | All riders | Under 21 |
| Lane splitting | Not allowed | Not allowed |
Driving laws side by side: Louisiana vs Texas
Louisiana vs Texas: Louisiana and Texas have the same rule for learner's permit age: Permit at 15.
Max speed limit: Louisiana vs Texas
The law is faster in Texas on max speed limit: Louisiana with 75 mph and Texas with 85 mph. Open-road interstates reach 75 mph in Louisiana and 75 mph in Texas. Driving out of New Orleans for Houston, check the posted limit following the border.
Phone law: Louisiana vs Texas
Texas is looser on phone law, with Louisiana with hands-free law and Texas at texting ban only. What you may do with a phone in New Orleans cannot be near Houston on the other side.
Owning a car compared: Louisiana vs Texas
Louisiana vs Texas: Texas and Louisiana agree on 30 days for new resident deadline.
Minimum car insurance requirements: Louisiana vs Texas
The rule is higher in Texas on car insurance, with Louisiana with 15/30/25 and Texas at 30/60/25. Louisiana is at-fault and Texas is at-fault. A policy written in New Orleans has to be updated if you relocate to Houston.
Car sales tax: Louisiana vs Texas
The rule is higher in Texas on car sales tax, with Louisiana at 5% and Texas with 6.25%. For a $30,000 purchase, state tax is roughly $1,500 in Louisiana and $1,875 in Texas. Buyers from Baton Rouge and San Antonio pay the tax of their home state, not the dealer's.
Vehicle inspection and emissions testing: Louisiana vs Texas
The law is stricter in Louisiana on car inspection, with Louisiana with safety + emissions and Texas at emissions only. A car registered in Baton Rouge answers to Louisiana laws, even on trips to San Antonio.
Motorcycle compared: Louisiana vs Texas
Louisiana vs Texas: Louisiana and Texas agree on lane splitting (Not permitted).
Helmet law: Louisiana vs Texas
Louisiana is stricter on helmet law, with Louisiana at all riders and Texas at under 21. Motorcyclists riding from New Orleans to Houston fall under Texas's helmet rule at the border.
Moving or buying across the border
- Louisiana vs Texas: moving from Louisiana to Texas gives you 30 days for the car registration and 90 days for a license.
- Going from Texas to Louisiana: 30 days for registration and 30 days for a license.
Louisiana vs Texas: FAQ
Which has the higher speed limit, Louisiana or Texas?
Texas (85 mph vs. 75 mph).
Is car tax lower — Louisiana or Texas?
Louisiana costs less at the state level (5% vs. 6.25%).
Is a motorcycle helmet required in both Louisiana and Texas?
Louisiana: All riders; Texas: Under 21.