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2. Clearance (civil engineering) - Wikipedia

   en.wikipedia.org/wiki/Clearance_(civil_engineering)

   For roads without curbs, the clearance for that is 1.5 metres (4 ft 11 in) given that the minimum clearance from the center line of the roads is 5 metres (16 ft 5 in). [ 21 ] For roadways that require passing under some structures such as tunnels, there are standards on the entire width of the roads known as horizontal curb-to-curb and wall-to ...

3. Interstate Highway standards - Wikipedia

   en.wikipedia.org/wiki/Interstate_Highway_standards

   Vertical clearance: The minimum vertical clearance under overhead structures, such as bridges, is 16 feet (4.9 m), including both paved shoulders and an allowance for extra layers of pavement. Through urban areas, at least one routing is to have 16-foot (4.9 m) clearances, but others may have a lesser clearance of 14 feet (4.3 m).

4. Low-floor bus - Wikipedia

   en.wikipedia.org/wiki/Low-floor_bus

   Low-floor buses are first adopted in Germany in 1989, and to make them easier to use for wheelchairs and strollers, the minimum ground clearance of the entire vehicle is lowered and the floor is proportionately raised by 30 centimetres (12 in) above the road surface.

5. List of bridges in the United States by height - Wikipedia

   en.wikipedia.org/wiki/List_of_bridges_in_the...

   A bridge's deck height is greater than its clearance below, which is measured from the bottom of the deck structure, with the difference being equal to the thickness of the deck structure at the point with the greatest clearance below. Official figures for a bridge's height are often provided only for the clearance below, so those figures may ...

6. Structure gauge - Wikipedia

   en.wikipedia.org/wiki/Structure_gauge

   Eurocode 1: Actions on structures has a definition of "physical clearance" between roadway surface and the underside of bridge element. The code also defines the clearance that is shorter than the physical clearance to account for sag curves, bridge deflection and expected settlements with a recommendation of minimum clearance of 5 metres (16 ft 5 in). [2]

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