While only three countries -- Burma, Liberia, and the United States -- have not officially adopted the International System of Units (or "metric system") as their official system of measurement, the use of measurement units on road distance and speed limit signs is somewhat different. While most use km and km/h, several nations, many of whom are officially metric, continue to use miles and mph or even a mixture of km and mph for road traffic signs.
This chart attempts to illustrate the current use of measurement units on road distance and speed limit signs by all countries in the world using publicly available information verifiable online.
Primary source: http://en.wikipedia.org/wiki/Miles_per_hour
11 years ago
