Minimizing the health and climate impacts of emissions from heavy-duty public transportation bus fleets through operational optimization.

In contrast to capital control strategies (i.e., investments in new technology), the potential of operational control strategies (e.

Spatial distribution of diesel transit bus emissions and urban populations: implications of coincidence and scale on exposure.

Macroscale emissions modeling approaches have been widely applied in impact assessments of mobile source emissions. However, these approaches poorly characterize the spatial distribution of emissions and have been shown to underestimate emissions of some pollutants. To quantify the implications of these limitations on exposure assessments, CO, NO(X), and HC emissions from diesel transit buses were estimated at 50 m intervals along a bus rapid transit route using a microscale emissions modeling approach.

Intake fraction of urban wood smoke.

Intake fraction (iF), the proportion of emissions inhaled by an exposed population, is useful for prioritizing sources with the greatest impact on population exposure per unit emissions. This article reports iF estimates for urban winter wood smoke emissions. We used two approaches, incorporating spatiotemporal statistical models for (1) winter wood smoke fine particulate matter (PM2.