clearance

distance between surface under bridge and bottom of a bridge deck

Clearance can refer to: ==Medicine== Renal clearance ratio, a relative measure of the speed at which a constituent of urine passes through the kidneys Clearance (pharmacology), the rate at which a substance is removed or cleared from the body by the kidneys or in renal dialysis ==Engineering== Engineering tolerance, a physical distance or space between two components Hydraulic clearance, in hydraulic systems Clearance in civil engineering, including: The difference between the loading gauge and the structure gauge: the amount of space between the top of a rail car and the top of a tunnel or the bottom of a rail car and the top of rail Air draft, applies to bridges across navigable waterways Clearance car, a type of railroad car used to check clearances around the tracks Ride height or ground clearance, the amount of space between the base of an automobile tire and the underside of the chassis ==Finance and trade== ===Intellectual property=== Collective rights management, the licensing of copyright and related rights Sample clearance, legal permission to re-use a recording in another work ===Other uses in finance and trade=== Cheque clearing, the process of transferring value on a cheque from one bank account to another The activity of a clearing house (finance), where a variety of financial instruments are cleared through the issuing institution Customs clearance, in international trade, the movement of goods through customs barriers Market clearing or equilibrium price, the price at which quantity supplied is equal to quantity demanded Closeout (sale), in retail, the final sale of items to zero inventory ==Games and sports== Clearance (cue sports) A chess term for removal of pieces so that a bishop, rook or queen is free to move In Australian rules football, the clearing of the ball out of a ball-up situation ==Other uses== Authorization or permission from an authority Air traffic control clearance in aviation Security clearance, a status granted to individuals allowing them access to classified information Clearance rate, in criminal justice, the number of crimes "cleared" divided by the number reported Deforestation, the deliberate clearance of woodland or forest for human development The Highland Clearances, eviction of tenants in the Scottish Highlands during the 18th and 19th centuries The Lowland Clearances, eviction of tenants as part of the Scottish Agricultural Revolution in the Scottish Lowlands

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