7 American Driving Rules That Surprise UK Tourists

News and Info from Deeside, Flintshire, North Wales

This article is old - Published: Monday, Sep 15th, 2025

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If you’re heading from Deeside (or elsewhere in the UK) to the States and you’re intending to drive whilst across the pond, you’ll need to brush up on your knowledge of US driving rules. (Be sure to check out both nationwide and state-specific rules.)

So, here are just seven American driving rules that might surprise you…

Turning Right on a Red Light

One of the most noticeable differences for UK drivers in America? The ability to turn right at a red light.

In the US, unless there’s clear signage prohibiting it, you’re allowed to make a right turn at red lights after coming to a complete stop. This rule helps traffic flow more smoothly. But it can feel counterintuitive for drivers from the UK who are used to waiting until the lights fully change.

In the UK, turning on red lights is strictly illegal under any circumstances.

Approaching an American intersection with this allowance can be disorienting at first. And it requires extra attentiveness—not only must you watch for oncoming cars, but also pedestrians crossing parallel lanes (who always have priority over vehicles when permitted!).

The last thing you want is to be involved in an accident, in which case you may need to consult a local auto accident lawyer.

So, make sure you’re familiar with all driving rules that differ from those in the UK.

Four-Way Stop Signs Etiquette

Now, let’s talk about navigating four-way stop signs in the States. They depend on mutual driver coordination (instead of automated signals).

Here’s how these intersections work:

Drivers must come to a complete stop before they enter the intersection.
The vehicle that arrives first has the right of way – and proceeds first.
If two vehicles arrive simultaneously, priority is given to the car on the right.
Hand gestures or eye contact are often used when multiple cars approach at once to establish turn order.

So, they’re rather unlike the UK’s roundabouts – with continuous traffic flow and clear priorities.

While it might seem awkward at first, most find it surprisingly efficient once adjusted!

Differences in Overtaking and Undertaking Rules

On American roads, the rules around overtaking and undertaking can surprise UK drivers.

While the UK restricts undertaking to specific circumstances, it’s a much more common practice in the US:

Vehicles may overtake on either side on multi-lane highways or freeways.
Undertaking is not illegal if traffic flows freely across all lanes.
The concept of a “fast lane” isn’t as rigid—drivers occupy whichever lane they choose, making overtaking less structured.

In the UK, undertaking is generally prohibited except during slow-moving traffic or when vehicles in other lanes signal to turn right.

Adapting to this difference requires extra vigilance since cars might pass unexpectedly from any direction at higher speeds.

Variable Speed Limits in Certain States

Some American states (such as Utah) implement variable speed limits, which is a concept that’s sure to be unfamiliar to UK drivers who are used to static limits.

These limits can change depending on various factors:

Weather conditions, like heavy rain or snow, may reduce the maximum allowable speed.
Traffic congestion can trigger lower speeds to improve safety and manage flow.
Some highways adjust limits based on the time of day – for instance, lowering speeds during school hours or peak commuting times.

In the UK, motorways primarily feature fixed speed signs supplemented by occasional advisory warnings in adverse weather. In contrast, US roads often use electronic displays that actively update restrictions as conditions shift.

This requires constant attention from drivers who are unfamiliar with changing rules along their route.

The Legal Drinking Limit for Drivers Could Differ

In most US states, the blood alcohol concentration (BAC) limit is 0.08%.

Whilst England, Wales, and Northern Ireland use an approximate equivalent of 80mg per 100ml, Scotland enforces a stricter BAC limit of 0.05%.

Penalties in the US vary by jurisdiction but tend to involve fines, licence suspensions, or even jail time (and no one wants that!).

American drink-driving laws remain heavily enforced with severe consequences for violations. You have been warned!

School Bus Stopping Laws Across All Lanes of Traffic

One uniquely American rule that UK drivers may find surprising is the strict law surrounding school buses. When a school bus stops to pick up or drop off children, and its flashing red lights are activated, all traffic must come to a halt.

Here’s what this entails:

Drivers on both sides of an undivided road must stop completely until the bus resumes motion.
On multi-lane roads without a central divider, vehicles travelling in both directions are also required to stop.
Some states impose severe penalties for failing to comply.

In the UK, there aren’t equivalent laws requiring cars on both sides of the road to stop when children board or exit buses.

This difference highlights America’s emphasis on safeguarding schoolchildren near roadsides—something visitors should take particular care in observing!

Left Turn Lanes and Protected Signals Designated by Arrows

American intersections often have designated left-turn lanes with specific arrow signals, which can feel unfamiliar for UK drivers.

Here’s how they work:

Left-turn-only lanes separate turning traffic from vehicles continuing straight ahead.
Green arrows indicate a “protected turn,” meaning oncoming traffic is halted, allowing drivers to turn safely without yielding.
Flashing yellow arrows allow left turns. But they require yielding to oncoming cars and pedestrians first.

In the UK, such structured systems are less common—left turns (or right-hand turns in the UK) generally require motorists to navigate based on priority rules or regular signals rather than dedicated arrows.

American setups may initially seem complicated with their additional signal phases. But they provide clear guidance for handling busy junctions efficiently (once you get accustomed to their timing!).

The Takeaway

Driving in the US offers UK tourists a chance to explore new landscapes, but understanding the unique driving rules ensures safer journeys and avoids costly mistakes on unfamiliar roads.

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