What is the standard width of a four lane highway?

The standard width of a four-lane highway typically ranges from 48 to 60 feet (approximately 14.6 to 18.3 meters) in total, accommodating two lanes in each direction. Each lane is usually around 12 feet wide (about 3.7 meters). Additional widths may be included for shoulders, medians, and other features, which can vary based on specific design standards and regional regulations.