What countries drive in miles?

Road Standards: Miles vs. Metric Countries

Many travelers wonder about global measurement standards while planning trips. Understanding which regions utilize specific units helps clarify road travel expectations internationally. When you prepare for your next journey, identifying these measurement differences ensures you navigate effectively, avoiding confusion regardless of your destination or the mode of transport selected. If you are specifically interested in air travel, you may wonder how long does it take to fly from Binh Duong to Hanoi.

What countries drive in miles?

Questions about global road standards often reveal a fascinating split in how we measure distance. Only a handful of countries primarily use miles for driving distances and speed limits^[1] today. The most notable holdouts are the United States, the United Kingdom, and Liberia. While most of the world adopted the metric system, these nations maintain miles as their standard measurement on the road.

A Look at the Global Holdouts

It might surprise you to know that the United Kingdom, despite its proximity to Europe, retains miles for road signs and speed limits. In the United States, miles remain deeply ingrained in infrastructure and daily travel habits. Liberia stands as the third primary nation adhering to this system, highlighting how historical influence continues to shape modern transportation standards.

Additionally, several smaller territories and islands continue to use miles, including Anguilla, Antigua and Barbuda, the Cayman Islands, Dominica, Montserrat, St. Kitts and Nevis, and the Turks and Caicos. These locations largely follow the British system for their road regulations.

Why Do Some Countries Still Use Miles?

Measurement systems are rarely just about math - they are about history and infrastructure. Transitioning an entire nation to kilometers requires updating every single road sign, speedometer, and speed regulation document, which involves significant logistical costs. For many, the existing infrastructure based on miles is simply too deeply embedded to change easily.

In my experience, even in countries that officially switched to the metric system, older generations sometimes revert to miles during conversation. It shows how difficult it is to shift cultural habits once they take root in daily life. This is why the UK continues to use miles for distance while using other metric measurements in different sectors of society.

Miles vs. Kilometers at a Glance

Miles (US, UK, Liberia)

- Standard for road signs and speed limits

- 1 mile is approximately 1.6 kilometers

Kilometers (Global Standard)

- Used by over 90% of countries globally

- 1 kilometer is approximately 0.62 miles

Minh's Road Trip Challenge

Minh, a 28-year-old traveler from Ho Chi Minh City, planned a road trip across the UK after years of driving in Vietnam, where kilometers are the standard. He was comfortable with his driving skills but anxious about navigation.

When he first stepped into his rental car, the speedometer looked foreign. He constantly worried about miscalculating speed limits in towns, often feeling like he was driving much slower than the local traffic.

He eventually started using a simple mental trick: looking at his GPS app which displayed both units simultaneously. This helped him map the local mile signs to his internal sense of distance after a few days.

By the end of the trip, Minh realized that adapting was less about the math and more about paying attention to road signs. He finished his two-week journey without a single speeding fine, having mastered the shift between units.