100 Dumb US Laws (With Proof They Exist)
In my experience, driving in the United States is significantly less stressful than in Europe. The roads are generally wide and well-maintained, signage is intuitive, and convenience stores at gas stations offer a wide selection of coffee. What are the speed limits in the USA, when can you turn on red, and which roads require tolls? In this article, you will find everything you need to know about driving in the USA.
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Table of Contents
Traffic Rules in the USA
➡️ Driving Side
In the USA, as in most countries, traffic moves on the right-hand side of the road.
🪪 Driver’s License
A standard European category B driver’s license is sufficient for driving a passenger car. Police officers and car rental agencies accept most international licenses without issue. However, I strongly recommend obtaining an International Driving Permit before your trip to avoid any complications.
🔞 Rental Fees for Drivers Under 25
Car rental agencies in the USA typically charge a “Young Renter Fee” for drivers under 25. This surcharge usually ranges from $25 to $35 per day, reflecting the higher insurance risk associated with younger drivers.
🦺 Seatbelt Laws
Seatbelts are mandatory for all passengers in the vehicle while it is in motion.
🌉 Toll Roads and Bridges
While many highways are free, some require tolls. These are more common on the East Coast. On the West Coast, tolls are typically collected only for crossing specific bridges or tunnels. You can check a list of toll roads on PlatePass.com.
🍷 Blood Alcohol Limit
The legal blood alcohol concentration (BAC) limit in the USA is generally 0.08%. Driving is legal if you are under this limit. However, there are exceptions: Utah has a stricter limit of 0.05%, and a zero-tolerance policy applies to drivers under the legal drinking age of 21.
Note: A BAC of 0.08% corresponds to 0.8 per mille (0,8 ‰). For a detailed list of laws by state, visit FindLaw.com.
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Differences Between US and European Driving
📏 Imperial Units
Distances on road signs are displayed in miles, and speed is measured in miles per hour (mph). One mile is equivalent to 1.609 km, and 100 yards is approximately 91 meters.
Fuel is sold by the gallon (1 gallon = 3.785 liters). Fuel efficiency is measured in miles per gallon (mpg). To convert mpg to l/100 km, divide 235 by the mpg value.
🚗 Automatic Transmissions Are Standard
The vast majority of rental cars in the USA feature automatic transmissions. These vehicles have only two pedals: the brake on the left and the accelerator (gas) on the right. This makes driving in traffic much easier. If you are accustomed to a manual transmission, don’t worry—you will adapt very quickly. Read our guide on how to drive an automatic car for tips.
🔦 Daytime Running Lights
In most US states, daytime running lights are not mandatory unless visibility is poor or it is dusk/dawn. Specific laws can be checked on VehicleAid.com.
🚦 Traffic Light Positioning
A key difference is that traffic lights are often positioned on the far side of the intersection, rather than directly above the stopping line. You will get used to this perspective quickly. Also, traffic signals typically jump directly from red to green, skipping the red-yellow combination found in many European countries.
❌ 4-Way Stops
At intersections without traffic lights, you may see a “4 Way” or “All Way” stop sign. At these intersections, the right-of-way is determined by arrival order: the first vehicle to come to a complete stop is the first to proceed.
🔴 Turning Right on Red
Unless a sign prohibits it, you are generally allowed to turn right at a red light after coming to a complete stop and yielding to oncoming traffic.
Exception: In New York City, turning on red is prohibited unless a sign explicitly permits it. Elsewhere, look for “No Turn on Red” signs or a dedicated red arrow, which strictly prohibit the maneuver.
⛽ Prepayment for Fuel
At most gas stations, you must pay before you can pump gas. You can usually pay at the pump with a card or prepay in cash inside the store. Detailed instructions are available in our article on refueling in the USA.
➡️ Passing on the Right
On multi-lane highways, passing on the right is permitted. Be aware that American drivers may change lanes without using turn signals. Keep an eye out for “Slow Traffic Keep Right” signs, which legally require slower vehicles to use the rightmost lanes.
2️⃣ Carpool (HOV) Lanes
In major cities like Los Angeles, you will see lanes marked with a diamond symbol or “Pool Only.” These High Occupancy Vehicle (HOV) lanes are reserved for cars with two or more passengers (sometimes three).
Using a carpool lane as a solo driver can result in a steep fine, starting around $490 in California (as of 2026). You may only enter or exit these lanes at designated broken lines.
🚌 School Buses
It is strictly illegal to pass a school bus that has stopped and extended its “STOP” sign or has flashing red lights. You must stop in both directions (unless there is a physical median). Fines are severe, typically ranging from $300 to over $1,000 depending on the state, and can even include jail time.
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Highways: Signs, Tolls, and Terms
Highway numbers often indicate direction: Odd numbers usually run North-South, while even numbers run East-West. Signs may also explicitly state the direction (N, E, S, W). When merging, the “zipper merge” method is standard practice.
While most roads are free, tolls exist on specific infrastructure. Examples include:
- The San Francisco-Oakland Bay Bridge: Regular toll is roughly $8, while carpools pay a discounted rate during peak hours.
- The scenic 17-Mile Drive in California: Entry fee is $12 per vehicle.
Terminology for roads can vary:
Causeway
A raised road or track across low or wet ground, often involving long bridges. The MacArthur Causeway in Miami is a famous example.
Expressway
A high-speed divided highway with partial access control. It may have some intersections but is generally designed for fast travel.
Freeway
A highway designed for high-speed traffic with no traffic lights or intersections (access is via ramps only). Pedestrians and cyclists are prohibited. Freeways are typically free of charge, though not always.
Highway
A general term for a main road. It can be a multi-lane high-speed road or a rural two-lane road. Intersections and traffic lights may be present.
Interstate
A federally funded network of highways connecting states, marked with a shield icon (e.g., I-10, I-75). These are the arteries of US travel.
Parkway
A scenic broad road, often running through a park or connecting green spaces. Commercial traffic (trucks) is usually prohibited.
Scenic Route
Roads designated for their scenic beauty, often found in National Parks. These can be narrow and winding; large RVs may be restricted.
Turnpike
A term commonly used in the Eastern US for a toll highway.
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Speed Limits
Speed limits are set by individual US states and can vary significantly.
Compared to some European highways, US limits might seem lower. The highest posted limit is 85 mph (137 km/h) on a specific toll road in Texas.
- East Coast: Typically 70 mph (113 km/h).
- West Coast & Midwest: Often 75 mph (121 km/h) to 80 mph (129 km/h).
While keeping up with the flow of traffic is common, technically any speed over the limit is a violation. Major violations can result in a mandatory court appearance. The average speeding ticket costs around $150, but insurance hikes make the real cost much higher.
On rural roads, limits often range from 55 mph to 70 mph. In residential areas and school zones, limits drop strictly to 15 mph – 25 mph. Police enforce these zones rigorously.
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Traffic Signs
Color Coding
Signs follow a consistent color scheme:
- Red: Stop, yield, or prohibition (Do Not Enter).
- Green: Navigation, direction, and highway exits.
- Blue: Motorist services (gas, food, lodging).
- Yellow: Warnings (curves, merging traffic).
- White: Regulatory instructions (speed limits, lane rules).
- Orange: Construction and road work warnings.
- Fluorescent Yellow-Green: School zones, pedestrian, and bicycle crossings.
- Fluorescent Pink: Emergency incident management (accidents, floods).
- Brown: Recreation and cultural interest (parks, historic sites).
Shapes
- Octagon: Stop.
- Inverted Triangle: Yield.
- Diamond: Warning.
- Pentagon: School zone.
- Pennant (Sideways Triangle): No passing zone.
- Circle: Railroad crossing ahead.
Common Text Signs
US signs rely heavily on text instructions:
- ◊ CAR POOLS ONLY: Lane reserved for high-occupancy vehicles (2+ people).
- 4 WAY / ALL WAY: All directions stop; proceed in order of arrival.
- BUMP / DIP: Warning for uneven road surface.
- DETOUR: Alternative route.
- NO TURN ON RED: You must wait for a green light to turn.
- ONE WAY: Traffic flows in a single direction.
- PED XING: Pedestrian crossing.
- TOW AWAY ZONE: Illegal parking will result in towing.
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Parking Rules
It is safest to use designated off-street parking lots (garages). Street parking is regulated by signs and curb colors:
⬜ White Curb
Loading/unloading of passengers only, or general parking if signs permit.
🟩 Green Curb
Limited time parking (e.g., 15 or 30 minutes).
🟨 Yellow Curb
Commercial loading zone. Drivers of private cars usually must stay with the vehicle for quick drop-offs.
🟥 Red Curb
No stopping, standing, or parking at any time.
🟦 Blue Curb
Reserved strictly for vehicles displaying a valid disabled parking placard.
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Police Encounters
If a police car flashes its lights behind you, you are being pulled over.
1. Safely pull over to the right shoulder as soon as possible.
2. Turn off the engine, roll down your window, and place your hands visibly on the steering wheel.
3. Do not exit the vehicle unless instructed.
4. Wait for the officer to approach and ask for your license and registration.
5. Avoid sudden movements or reaching into the glovebox until the officer asks you to do so.Politeness and compliance are key. If you remain calm and follow instructions, the interaction will be professional.
How Much Does It Cost to Rent a Car in the USA?
- No Hidden Fees
The prices stated at the time of reservation are always final, providing a clear overview of your expenses. - Lowest Price Guarantee
If you find the same deal at a lower price elsewhere, RentalCars will refund the difference. - Cancellation Is Free of Charge
Most bookings can be cancelled or altered free of charge up to 48 hours before collection.
Discussion (1)
In California, the regulations are followed. There are exceptions, of course. Drivers here are much more considerate than here. The zipper works perfectly. Experience: just for the sake of being polite, I wanted to let two cars go when zipping and I thought I was an idiot who didn’t know how to zip. You can drive on a nice straight road under the speed limit, but because it’s full of cars and the Americans just won’t pass and wait for you to move – it’s mandatory if there’s a queue behind you. On an eight-lane highway, you can easily get from the eighth lane to the first. Probably the only thing that is lacking here is the flashing at junctions in the turning lanes, when overtaking it usually works. There are more differences than that.