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Identifying Traffic-Related Air Pollution Hotspots in the Built Environment.

机译:识别建筑环境中与交通有关的空气污染热点。

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摘要

This study characterizes the spatial and temporal distribution of air pollution in an urban street environment given traffic and meteorological conditions. A mobile air monitoring platform was used to measure ultrafine particle (UFP) counts on a 1-second basis along a 3 mile-long transect in Downtown Los Angeles in April-July 2008 for a total of 12 runs and roughly 7,500 observations. Significantly higher UFP concentrations were found in morning compared to afternoon measurements. Spatially speaking, mean UFP concentrations were higher at intersections. High emitting vehicles (HEV), typically old light duty vehicles or medium and heavy duty diesel trucks, were associated with higher spikes of pollution. Advanced statistical modeling is needed to understand how UFP plumes from accelerating vehicle queues disperse in the built environment while controlling for wind conditions. These findings inform smart growth and traffic management strategies, and ultimately, support the creation of a toolkit for transportation planners and policy decision makers to mitigate air pollution exposures in urban street environments and near transit-oriented development (TOD).
机译:这项研究的特点是在给定交通和气象条件下,城市街道环境中空气污染的时空分布。 2008年4月至7月,在洛杉矶市中心一个3英里长的样带上,移动空气监测平台用于在1秒内测量超细颗粒(UFP)计数,总共进行了12次运行,并进行了大约7500次观测。与下午的测量值相比,早上发现的UFP浓度明显更高。从空间上讲,交叉口的平均UFP浓度较高。高排放车辆(HEV),通常是老式轻型车辆或中型和重型柴油卡车,与较高的污染峰值相关。需要先进的统计模型来了解在控制风况的同时,来自加速的车辆队列的UFP羽流如何分散在建筑环境中。这些发现为明智的增长和交通管理策略提供了依据,并最终支持为交通规划人员和政策制定者创建工具包,以减轻城市街道环境和以公交为导向的发展(TOD)中的空气污染。

著录项

  • 作者

    Wu, Lisa.;

  • 作者单位

    University of California, Los Angeles.;

  • 授予单位 University of California, Los Angeles.;
  • 学科 Urban and Regional Planning.;Environmental Health.;Transportation.
  • 学位 M.U.R.P.
  • 年度 2014
  • 页码 59 p.
  • 总页数 59
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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