Due to the potential for heightened exposure to vehicle exhaust pollutants, air monitoring has been required at near roadway (NR) locations within large urban centers in the United States since 2010. In this paper pollutant measurements at two urban NR locations, Rochester and New York City, Queens are discussed. Pollutants measured at these sites include PM_2.5 mass, nitrogen oxides (NO, NO₂, NO_x), ultrafine particles (UFP), black carbon (BC) and carbon monoxide (CO). Measurements at NR sites are made in conjunction with existing urban background (UB) sites. Although pollutant concentrations at Rochester and Queens are elevated at the NR sites compared to the UB sites particularly during the daytime hours, all pollutants are below the level of the National Ambient Air Quality Standards (NAAQS). At Rochester, BC at the NR site is elevated by a factor of 2–3 between 7 a.m. and 3 p.m. and drops to near uniform concentrations at both sites at night. The enhancement or increment in BC is highest in summer and lowest in winter. Other co-pollutants including NO_x and CO are also elevated at the Rochester NR site by varying degrees during daytime hours. Similarly, enhanced pollutant concentrations are observed at the Queens NR site. At both locations small increments are observed for PM_2.5 mass. For example, an annual increment of 0.27 μg/m³ and a daily increment of 0.80 μg/m³ was observed at the Rochester NR site. At Queens NR annual PM_2.5 mass increments of 0.92 and 1.0 μg/m³ were observed in 2017 and 2018. In addition, a NR daily increment of 1.4 μg/m³ was observed at Queens in 2018. The data are analyzed for diurnal, weekday vs weekend and seasonal patterns. Nonparametric wind regression identified the roadways as the major source of traffic related air pollutants.

由于可能增加暴露于汽车尾气污染物的可能性，自2010年以来，就一直需要在美国大型城市中心内的近道路（NR）位置进行空气监测。本文对两个城市NR位置（罗切斯特和纽约）进行污染物测量市，皇后区进行了讨论。在这些站点测量的污染物包括PM _2.5质量，氮氧化物（NO，NO ₂，NO _x），超细颗粒（UFP），黑碳（BC）和一氧化碳（CO）。NR站点的测量是结合现有的城市背景（UB）站点进行的。尽管与UB站点相比，NR站点在Rochester和Queens的污染物浓度有所增加，尤其是在白天，但所有污染物均低于国家环境空气质量标准（NAAQS）的水平。在罗切斯特，从上午7点到下午3点之间，不列颠哥伦比亚省自然保护区的不列颠哥伦比亚省升高了2-3倍，到了晚上，两个地方的浓度都下降到接近统一的水平。BC的增加或增加在夏季最高，而在冬季最低。其他共污染物，包括NO _x在白天，罗切斯特自然保护区的CO和CO也不同程度地升高。同样，在皇后区NR站点观察到污染物浓度增加。在两个位置上，PM _2.5的质量均出现小幅增加。例如，在Rochester NR站点观察到年增量为0.27μg/ m ³，日增量为0.80μg/ m ³。在皇后区NR的年度PM _2.5的质量增量在2017年和2018年分别为0.92和1.0μg/ m ^3。此外，NR的日增量为1.4μg/ m ^3。是在2018年在皇后区观察到的。分析了数据的昼夜，工作日与周末以及季节性模式。非参数风向回归确定道路为交通相关空气污染物的主要来源。