Air quality impacts of a scheduled 36-h closure of a major highway (Abstract, David C. Quiros, Qunfang Zhang, Wonsik Choi, Meilu He, Suzanne E. Paulson, Arthur M. Winer, Rui Wang, Yifang Zhua, Atmospheric Environment, Mar. 2013)
Also discussed here: Air Quality Results of a Freeway Closure (5 page pdf, Arthur Winer, Yifang Zhu, and Suzanne Paulson, ACCESS, Jun. 2014)
Today we review the quantitative improvement in air quality that results from temporary closure of a heavily used freeway in southern California. Before and after measurements of air pollutants indicate as much as a 83% reduction during the period it was closed. The authors strongly recommend that steps be taken to reduce roadside pollution from freeways in future by limiting the use of single occupancy vehicles and to convert electrically powered vehicles. Almost make one wonder who came up with the idea of freeways to start with and, more to the point, why run these “pollution sewers” through urban centres where people have to breathe the resulting pollution! Vancouver is the only major city in North America that I can think of that does NOT have a freeway running through its centre- they must have clever urban planners there!
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