In 2015, a controversial bicycle lane was installed on Paulista Avenue –a thoroughfare in the heart of the megacity of São Paulo with a high rate of motorised vehicles. For the first time, on-bicycle air pollution concentrations were assessed along this lane using black carbon (BC) as an indicator of fossil fuel combustion. We measured BC concentrations with a hand-held AE51 microaethalometer at a high temporal resolution, enabling the capture of fine spatial gradients along the route. Although this new link expanded the city’s cycling network, our pioneering study showed that BC concentrations were large (mean 8.5 μg m^-3) with extreme values reaching 24.0 μg m^-3, comparable to concentrations found in many megacities. In agreement with other studies, we observed that concentrations decreased about 1.6 times on a section of the bicycle lane running through a calmer neighbourhood, which could indicate the potential to safeguard the health of cyclists by installing lanes with greater separation from main roads, such as Paulista Avenue. This pilot work paves the way to more detailed studies aiming to map out the spatial distribution of other traffic-related pollutants across the city’s 458-km long bicycle network.

2015年，在保利斯塔大街（Paulista Avenue）上安装了一条备受争议的自行车道，这是圣保罗大城市中心地带的通行道路，拥有大量机动车辆。第一次，使用黑碳（BC）作为化石燃料燃烧的指标，评估了沿这条车道的自行车上空气污染浓度。我们使用手持式AE51微型温度计在较高的时间分辨率下测量了BC浓度，从而可以捕获沿路线的精细空间梯度。尽管这个新的链接扩展了城市的自行车网络，但我们的开拓性研究表明，BC浓度很高（平均8.5μgm ^-3），极值达到24.0μgm ^-3，相当于许多大城市的浓度。与其他研究一致，我们观察到在经过一个较安静社区的自行车道上，该区域的浓度降低了约1.6倍，这可能表明，通过与主要道路分开设置更大的车道，可以保护骑自行车者的健康。保利斯塔大街。这项试点工作为更详细的研究铺平了道路，旨在绘制出整个城市458公里长的自行车网络中其他与交通有关的污染物的空间分布。