Particulate matter (PM) is one of the most dangerous pollutants in urban environments, and studies have linked it to many adverse health effects. Resuspended road dust makes up a large portion of PM. Therefore, monitoring and estimating the contribution of resuspended dust to PM is vital. In this study, emission rates of fine and coarse PM from different roads of Vellore City in Tamil Nadu, India, is estimated using silt loading protocol adapted by U.S. EPA. Silt load samples are collected from 8 different roads in the study region. The emission rates estimated using silt loading and fleet weight are then used to model the dispersion of PM throughout the study region using AERMOD. Hotspots of high PM concentration are identified at various locations frequented by commuters in the study region. Areas around educational institutions and hospitals in the region show highly elevated levels of PM. This study illustrates that resuspension of road dust can contribute significantly to PM in urban centers. Fine PM concentration exceeding 500 μg/m³ raises concerns about the health of commuters in the study region. This justifies the need for more regulations aiming at reducing the contribution of PM from resuspended road dust to overall urban PM.

颗粒物（PM）是城市环境中最危险的污染物之一，研究已经将其与许多不利的健康影响联系在一起。重悬的道路灰尘占PM的很大一部分。因此，监测和估计重悬粉尘对PM的贡献至关重要。在这项研究中，使用美国环保署改编的粉尘装载协议估算了印度泰米尔纳德邦韦洛尔市不同道路上的细颗粒和粗颗粒颗粒物的排放率。从研究区域的8条不同道路收集了淤泥负荷样品。然后，使用淤泥负荷和船队重量估算的排放率将用于通过AERMOD对整个研究区域中PM的扩散进行建模。在研究区域的通勤者经常光顾的各个位置发现了高PM浓度的热点。该地区教育机构和医院周围的区域显示出较高的PM水平。这项研究表明，道路灰尘的重新悬浮可显着影响城市中心的颗粒物。细微PM浓度超过500μg/ m^图3引起了人们对研究区域通勤者健康的担忧。因此，有必要制定更多的法规，以减少因重悬道路尘土而产生的PM对城市总体PM的贡献。