* Interstate highways: 8.5 feet (2.6 m)
* Other federal highways: 8 feet (2.4 m)
* State highways: Varies by state, but typically 8 feet (2.4 m) or 8.5 feet (2.6 m)
Canada
* National highways: 8.5 feet (2.6 m)
* Provincial highways: Varies by province, but typically 8 feet (2.4 m) or 8.5 feet (2.6 m)
Mexico
* Federal highways: 8 feet (2.4 m)
* State highways: Varies by state, but typically 8 feet (2.4 m) or 8.5 feet (2.6 m)
Europe
* European Union: 8.25 feet (2.5 m)
* Other countries: Varies by country, but typically 8 feet (2.4 m) or 8.5 feet (2.6 m)
Australia
* National highways: 8.5 feet (2.6 m)
* State highways: Varies by state, but typically 8 feet (2.4 m) or 8.5 feet (2.6 m)
New Zealand
* National highways: 8.5 feet (2.6 m)
* State highways: Varies by state, but typically 8 feet (2.4 m) or 8.5 feet (2.6 m)
