Everything you need to know about driving in the United States.
Driving side
Right
Speed limits
25 mph – 55 mph – 70 mph
Alcohol limit
0.08% BAC
Motorway tolls
Yes
Emergency number
911
Rules are state-based but generally consistent. 'Right on Red' is standard (stop first) unless signed otherwise. Stop signs are meant literally. Do not pass stopped school buses.
Speeding
Using phone while driving
Parking violation
Red light
You must stop.
Come to a complete stop at the stop line. Right on red is often allowed—stop fully first, then turn unless a sign prohibits it.
Tip: Press play to see the US cycle (red → green → yellow).
Rules may change. Always verify with official sources.
Urban
25 mph
40 km/h
Rural
55 mph
89 km/h
Motorway
70 mph
113 km/h
Varies wildly by state. Freeway limits range from 65 to 85 mph. Watch signs.
In Austria, rules can vary by state and city. Click on a region to see local differences.
Hands-free phone law
Holding a phone while driving is illegal. Mount your device and use voice commands or single-swipe gestures only.
Motorcycle lane splitting
Motorcycles may filter between lanes in slow traffic when done safely—unique among US states.
HOV and express lanes
Carpool lanes and paid express lanes are common in LA and Bay Area. FasTrak transponder may be required.
Please note
Regional rules supplement national defaults. Always follow signs and local regulations on the road.
U.S. Department of Transportation
U.S. Department of Transportation
California Department of Motor Vehicles
Florida DHSMV