Average daily traffic

Average daily traffic

Average daily traffic or ADT, and sometimes also mean daily traffic, is the average number of vehicles two-way passing a specific point in a 24-hour period, normally measured throughout a year. ADT is the standard measurement for vehicle traffic load on a section of road, and the basis for most decisions regarding transport planning, or to the environmental hazards of pollution related to road transport. [cite web |url=http://www.epidem.com/pt/re/epidemiology/abstract.00001648-200511000-00005.htm;jsessionid=LG0dw1Kp0TXh88SPzyNRD2DgB4KP6RwYzMdWHWLjpXYJdpW52CjH!446770951!181195629!8091!-1 |title=Childhood Asthma and Exposure to Traffic and Nitrogen Dioxide. |author= Gauderman, W James et. al. |date=2005] [cite web |url=http://trb.metapress.com/content/v50w3857p5133461/ |title=http://trb.metapress.com/content/v50w3857p5133461/ |title= Accuracy of Estimates of Mean Daily Traffic: A Review |author= Gary A. Davis |date=2007] Road authorities have norms based on ADT, with decisions to expand road capacity at given thresholds.

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