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Fire lanes may be any width larger than 20 feet (6.1m) across. This gives enough room to maneuver the truck into position. They must also be at least ten feet away from any building or structure overhang to allow overhead clearance. If trees are near a fire lane, they must be trimmed to allow a 14-foot (4.25m) clearance over the fire lane. [1]
Climbing lanes and emergency escape ramps should be provided where appropriate. 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 ...
According to French standard "Norme NF P 91-100", minimum width of parking spaces range from 2.20 to 2.30 metres (7.2–7.5 ft) (See fr:Marquage du stationnement en France). Narrow parking spaces such as in Vevey, Switzerland, might make opening the door difficult in a larger vehicle. Larger cars are an issue when the size of the bay is fixed.
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]
In South Africa and the southern region of Africa, the minimum vertical clearance of modern bridges is 5 metres (16 ft 5 in), although the legal height limit of road vehicles is still at 4.3 metres (14 ft 1 in). [7] United Kingdoms has a standard on minimum clearance of a public highway at 16 feet 6 inches (5.03 m).
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A shoulder (American English), hard shoulder (British English) [1] or breakdown lane (Australian English) is an emergency stopping lane by the verge on the outer side of a road or motorway. Many wider freeways , or expressways elsewhere have shoulders on both sides of each directional carriageway—in the median, as well as at the outer edges ...
For example, during the Cedar Fire of 2003, strong Santa Ana winds had blown enough burning embers across a 10-lane section of Interstate 15 to ignite the vegetation on the other side. [3] During the 1988 fires in Yellowstone National Park , hot embers managed to cross the Lewis Canyon , a natural canyon up to a mile wide and 600 feet (180 m) deep.