Abstract
Publisher Summary This chapter discusses the highway runoff quality, environmental impacts and control. The chapter emphasizes the pollution problems related to runoff in separate sewered areas. Highway contaminants are deposited on roadway surfaces, median areas and right-of-ways from moving vehicles, stationary constructions and atmospheric fallout. The magnitude and pattern of accumulation are a function of the roadway pavement and grade, traffic volume, maintenance activities, seasonal characteristics and adjacent land use. Particulates and other associated pollutants on highway surfaces can be attributed to atmospheric deposition, road degradation and traffic activities. The chapter focuses on results for some specific pollutants. The water quality responses of pollutants from highway runoff are influenced by many factors such as meteorological, hydrological and geological conditions, plus land use practices. Water quality response to highway runoff discharges may result in an increase of suspended sediment deposition and sediment pollutant concentration in localized areas close to the input source. A number of management practices have been proposed to either prevent the discharge of these waters into receiving bodies or to treat them prior to release.
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