Transport Research International Documentation (TRID) https://trid.trb.org/ en-us Copyright © 2024. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Transport Research International Documentation (TRID) https://trid.trb.org/Images/PageHeader-wTitle.jpg https://trid.trb.org/ Oxidative potential, environmentally persistent free radicals and reactive oxygen species of size-resolved ambient particles near highways https://trid.trb.org/View/2291548 Wed, 27 Mar 2024 11:52:26 GMT https://trid.trb.org/View/2291548 Use of unmanned aerial systems for measuring particulate matter in the lower atmosphere in urban areas https://trid.trb.org/View/2317263 Mon, 25 Mar 2024 17:12:13 GMT https://trid.trb.org/View/2317263 Impacts of ship emissions and sea-land breeze on urban air quality using chemical characterization, source contribution and dispersion model simulation of PM₂.₅ at Asian seaport https://trid.trb.org/View/2347658 Thu, 21 Mar 2024 13:24:25 GMT https://trid.trb.org/View/2347658 Long-term exposure to PM10 and respiratory health among Parisian subway workers https://trid.trb.org/View/2343334 Wed, 20 Mar 2024 10:11:36 GMT https://trid.trb.org/View/2343334 Modeling Urban-Rural health disparities using a Taxi-Based mobile atmospheric monitoring system https://trid.trb.org/View/2351015 Wed, 20 Mar 2024 09:12:13 GMT https://trid.trb.org/View/2351015 Parametric evaluation of ducted fuel injection in an optically accessible mixing-controlled compression-ignition engine with two- and four-duct assemblies https://trid.trb.org/View/2326019 Tue, 19 Mar 2024 15:19:10 GMT https://trid.trb.org/View/2326019 The Number Concentration of Non-Volatile Particles - Design Study for an Instrument According to the PMP Recommendations https://trid.trb.org/View/2307237 Fri, 15 Mar 2024 16:35:11 GMT https://trid.trb.org/View/2307237 Ash Storage Concept for Diesel Particulate Filters https://trid.trb.org/View/2307232 Fri, 15 Mar 2024 16:35:11 GMT https://trid.trb.org/View/2307232 Long-term trends of black carbon and particle number concentrations and their vehicle emission factors in Stockholm https://trid.trb.org/View/2350114  4 nm) concentrations in Stockholm spanning the years 2013–2019 (BC) and 2009–2019 (PN) measured at street canyon and rooftop sites to assess the effectiveness of the implemented policies. Combining these data with inverse dispersion modeling, the authors estimated BC and PN emission factors (EF[subscript BC] and EF[subscript PN]) for the mixed fleet, reflecting real-world driving conditions. The pollutants showed decreasing trends at both sites, but PN concentrations remained high at the canyon site considering the World Health Organization (WHO) recommendations. BC concentrations declined more rapidly than PN concentrations, showing a −9.4% and −4.9% annual decrease at the canyon and −7.2% and −0.5% at the rooftop site in the years 2013–2019. The EF[subscript BC] and EF[subscript PN] trends showed that the mitigation strategies for reducing particulate emissions for on-road vehicles were successful over the study period. However, the introduction of biofuels in the vehicle fleet —ethanol and later rapeseed methyl ester (RME)— increased the concentrations of particles with Dₚ < 10 nm before the adoption of particulate filters in the exhausts. Stricter Euro emission regulations, especially with diesel particulate filters (DPF) in Euro 5, 6, and VI vehicles, led to 66% decrease in EF[subscript BC] and 55% in EF[subscript PN]. Real-world EFBC surpassed HBEFA (Handbook Emission Factors for Road Transport) database values by 2.4–4.8 times; however, direct comparisons between real-world and HBEFA EFPN are difficult due to differences in lower cut-off sizes and measurement techniques. The authors' results underscore the necessity for revising the HBEFA database, updating laboratory testing methods and portable emission measuring systems (PEMS) measurements to account for liquid condensate contributions to PN measurements.]]> Fri, 15 Mar 2024 16:34:47 GMT https://trid.trb.org/View/2350114 Automated SEM/EDX imaging for the in-depth characterization of non-exhaust traffic emissions from the Munich subway system https://trid.trb.org/View/2325088 Tue, 12 Mar 2024 09:33:04 GMT https://trid.trb.org/View/2325088 Behavior of Particulate Matter Emissions in a Dual-Fuel Engine https://trid.trb.org/View/2341985 Mon, 11 Mar 2024 16:32:03 GMT https://trid.trb.org/View/2341985 Investigation of Lubricant Additive Interactions on Gasoline Particulate Filters https://trid.trb.org/View/2341896 90%) and the ash particles consisted of a higher concentration of dense ash material. In contrast, four of the 3:1 Ca:Mg lubricant adpaks resulted in a collection efficiency of only 40–50%. Although the collection efficiency was higher with the Mg-only adpak, the ash layer in the GPF was not thicker, nor was the penetration into the wall more significant, and surprisingly the full useful life (FUL) backpressure was lower than with Ca:Mg adpaks. The higher density of the Mg-derived ash was the only detectable difference. A possible explanation of this observation is that Mg ash has a lower melting point and is more susceptible to densification during combustion or GPF regeneration. The substitution of IL in place of the ZDDP did not lead to any notable changes in collection efficiency or location of the ash.]]> Mon, 11 Mar 2024 16:32:03 GMT https://trid.trb.org/View/2341896 A Granular Characterization of Mobility-Related Air Pollution Exposure Disparity https://trid.trb.org/View/2350714 Mon, 11 Mar 2024 21:35:36 GMT https://trid.trb.org/View/2350714 Associations of exposure to ambient fine particulate matter constituents from different pollution sources with semen quality: Evidence from a prospective cohort https://trid.trb.org/View/2316351 Fri, 08 Mar 2024 15:32:05 GMT https://trid.trb.org/View/2316351 A comprehensive exploration of characteristics and source attribution of carbonaceous aerosols in PM₂.₅ in an East China megacity https://trid.trb.org/View/2316311 Fri, 08 Mar 2024 15:32:04 GMT https://trid.trb.org/View/2316311