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Minimum lane width: The minimum lane width is 12 feet (3.7 m), identical to most US and state highways. Shoulder width: The minimum width of the left paved shoulder is 4 feet (1.2 m), and of the right paved shoulder 10 feet (3.0 m). With three or more lanes in each direction, both shoulders are to be at least 10 feet (3.0 m) wide.
In the United States, the Interstate Highway standards for the Interstate Highway System use a 12 ft (3.7 m) standard lane width, while narrower lanes are used on lower classification roads. In Europe, laws and road widths vary by country; the minimum widths of lanes are generally between 2.5 to 3.25 m (8.2 to 10.7 ft). [ 13 ]
The selection of lane width affects the safety, maximum capacity, and cost, of a highway. Safety is best at a width of 3.0 to 3.1 metres (9.8 to 10.2 ft) in urban settings, where both narrow (less than 2.8 metres (9 ft 2 in)) and wide (over 3.1 metres (10 ft)) lanes have higher crash risks.
The route consists of lanes designed to be a width of 12 feet (3.66 m) or more or is otherwise consistent with highway safety. The route does not have any unusual characteristics causing current or anticipated safety problems. The National Network was most recently defined by the Intermodal Surface Transportation Efficiency Act of 1991. [3]
Also included is additional data on the length of each country or region's controlled-access highway network (also known as a motorway, expressway, freeway, etc.), designed for high vehicular traffic. Unless otherwise noted, the data is from the United States's Central Intelligence Agency. [1] * indicates Roads in Country/Territory links.
Length: 48,890 mi [a] (78,680 km) ... One almost absolute standard is the ... because it is a parkway that consists of only one lane per side of the highway. On the ...
I-95 has designated places to enter and exit the express lanes in Broward and Miami-Dade. ... It’s illegal to violate the poles to enter or exit express lanes. Electronic signs over the highway ...
The Hal Rogers Parkway (formerly Daniel Boone Parkway), connecting Hazard and London, is a two-lane freeway for virtually its entire length (approximately 65 miles (105 km)), with occasional truck lanes on hills. The only four-lane section is the northern bypass of London at the road's western end.