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/ Contamination and source-specific health risk assessment of polycyclic aromatic hydrocarbons in soil from a mega iron and steel site in China https://trid.trb.org/View/2291586  coal combustion > traffic emissions. The incremental life-time carcinogenic risks were all below 10⁻⁴, indicating negligible or acceptable risks.]]> Wed, 27 Mar 2024 11:52:26 GMT https://trid.trb.org/View/2291586 Impacts of forest harvesting on mercury concentrations and methylmercury production in boreal forest soils and stream sediment https://trid.trb.org/View/2296266 75%) of harvested watershed area and more road construction had significantly increased THg and MeHg concentrations, %-MeHg, K[subscript meth] and total carbon content post-harvest. From these patterns, we infer that inputs of carbon and inorganic Hg into harvest-impacted stream sediment are likely sourced from the harvested upland areas and stimulate in situ MeHg production in stream sediment. These findings indicate the importance of stream sediment as potential MeHg pools in harvested forest watersheds. The findings also demonstrate that forest management practices aiming to mitigate organic matter and Hg inputs to streams can effectively alleviate harvesting impacts on Hg methylation and MeHg concentrations in stream sediment.]]> Wed, 27 Mar 2024 11:52:26 GMT https://trid.trb.org/View/2296266 Projected emissions and climate impacts of Arctic shipping along the Northern Sea Route https://trid.trb.org/View/2291593 Wed, 27 Mar 2024 11:52:26 GMT https://trid.trb.org/View/2291593 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 Gene expression analysis of Chironomus riparius in response to acute exposure to tire rubber microparticles and leachates https://trid.trb.org/View/2309626 Wed, 27 Mar 2024 11:52:26 GMT https://trid.trb.org/View/2309626 Spatiotemporal variation and inter-transport of atmospheric speciated mercury between Kaohsiung Harbor and neighboring urban areas https://trid.trb.org/View/2305055  fall > spring > summer. Concerning spatial distribution, ASM concentrations in the port areas were generally higher than those in the urban areas. This disparity was chiefly attributed to the influence of the prevailing winds, local sources, and atmospheric dispersion. Backward trajectory simulation revealed that polluted air masses blown from the northeast in winter and spring, moving along the western in-land part of Taiwan Island, were likely influenced by local sources and long-range transport (LRT). In summer, air pollutants originating from the south were likely transported from the coastal industrial sources. During fall, air masses blown from the western offshore waters transport air pollutants from Kaohsiung Harbor to neighboring Metro Kaohsiung. The results obtained from principle component analysis (PCA) indicated that primary sources in the port areas included ship emissions, vehicular exhausts, and nearby industrial complex, which align with the primary source factors identified by the positive matrix factorization (PMF), which were mobile sources and coal-fired industrial boilers. Meanwhile, mobile sources and sulfur-containing fuel/waste combustion were identified as the primary sources in the urban areas.]]> Wed, 27 Mar 2024 11:52:26 GMT https://trid.trb.org/View/2305055 Concentration-dependent alterations in the human plasma proteome following controlled exposure to diesel exhaust https://trid.trb.org/View/2305089 Wed, 27 Mar 2024 11:52:26 GMT https://trid.trb.org/View/2305089 Ecotoxicity of three typical tire wear particles to periphytic biofilms: The potentiating role after natural water-incubation-aging https://trid.trb.org/View/2340882 Fri, 22 Mar 2024 09:20:42 GMT https://trid.trb.org/View/2340882 Effects of the turbocharged Miller cycle strategy on the performance improvement and emission characteristics of diesel engines https://trid.trb.org/View/2343844 Fri, 22 Mar 2024 09:20:42 GMT https://trid.trb.org/View/2343844 Types and concentrations of tire wear particles (TWPs) in road dust generated in slow lanes https://trid.trb.org/View/2347654  FD (17–47%) > BD (13–36%), while the SBR composition ratio exhibited the sequence: BD (62–86%) > FD (48–79%) > TS (24–70%). The TWP concentrations in road dust obtained from the TS (0.35–0.82%) were discernibly lower than those in the FD (0.54–1.77%) and BD (0.61–1.29%) samples. Specifically, the average TWP concentrations in road dust samples, falling within the size range of 20–212 μm, were 0.45%, 1.06%, and 0.91% for the TS, FD, and BD samples, respectively. These concentrations were lower than the corresponding values observed in samples collected from a bus stop.]]> Thu, 21 Mar 2024 13:24:25 GMT https://trid.trb.org/View/2347654 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 Assessment of seabed litter at Concepción Seamount (Canary island) using a remotely operated towed vehicle https://trid.trb.org/View/2347662 Wed, 20 Mar 2024 09:12:13 GMT https://trid.trb.org/View/2347662 Towards zero pollution vehicles by advanced fuels and exhaust aftertreatment technologies https://trid.trb.org/View/2349927 Tue, 19 Mar 2024 15:18:50 GMT https://trid.trb.org/View/2349927 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 Mitigating air and noise pollution through highway capping: The Bundang-Suseo Highway Cap Project case study https://trid.trb.org/View/2350228 Fri, 15 Mar 2024 16:34:47 GMT https://trid.trb.org/View/2350228