Despite several studies on traffic calming devices, information on particulate matter contribution by vehicle abrasion and wear nearby vertical deflections of speed humps is scant. Many studies have been performed in the recent past on heavy metal contamination at roads mainly at intersections. On the other hand, the traffic calming devices were studied for their effectiveness in reducing the vehicle speed and thereby increasing road safety, but their environmental effects are neglected. In the present study, the relation between the concentrations of Cu and Zn (marker heavy metals for traffic sources) at speed humps were nearly thrice to that in intersections, while for another marker heavy metal Pb, it was found nearly twice in comparison. Pollution load index >3 was observed upto 7.5–8.8 m distances of speed humps, and these were identified as hotspot zones for traffic-generated pollution. Furthermore, this heavy-metal-laden speed hump soil can pose a threat to living beings by virtue of resuspension produced by vehicular movements. Therefore, it is necessary to manage this emerging environmental issue, and we propose a traffic calming device with wheel cut-out provision for different vehicle classes as an alternate.

中文翻译：

---

确定减速带（一种交通平静装置）是受交通影响的城市道路中的环境污染热点

尽管对交通平静装置进行了多项研究，但有关车辆磨损和减速带垂直偏转附近磨损造成的颗粒物贡献的信息仍然很少。近年来，针对道路（主要是交叉口）的重金属污染进行了许多研究。另一方面，人们对交通平静装置在降低车速从而提高道路安全方面的有效性进行了研究，但忽视了它们对环境的影响。在本研究中，减速带处的Cu和Zn（交通源标志性重金属）浓度之间的关系几乎是十字路口处的三倍，而另一种标志性重金属Pb的浓度关系则几乎是十字路口处的两倍。在减速带 7.5-8.8 m 距离内观察到污染负荷指数 >3，这些区域被确定为交通污染的热点区域。此外，这种富含重金属的减速带土壤会因车辆运动产生的悬浮而对生物构成威胁。因此，有必要解决这一新出现的环境问题，我们提出了一种针对不同车辆类别提供车轮切断功能的交通平静装置作为替代方案。