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/ 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 HALLO: Hubs for Last Mile Delivery Solutions in Barcelona and Stockholm https://trid.trb.org/View/2314947 Mon, 11 Mar 2024 09:08:57 GMT https://trid.trb.org/View/2314947 High capacity city transport with intelligent access - A Swedish case study of transporting excavated material https://trid.trb.org/View/2314710 Mon, 29 Jan 2024 09:16:27 GMT https://trid.trb.org/View/2314710 Collaborative challenges and barriers when planning and implementing Bus Rapid Transit (BRT). Lessons from Swedish BRT projects https://trid.trb.org/View/2301467 Fri, 26 Jan 2024 10:02:58 GMT https://trid.trb.org/View/2301467 Mobility constraints and accessibility to work: Application to Stockholm https://trid.trb.org/View/2226200 Wed, 20 Dec 2023 15:43:04 GMT https://trid.trb.org/View/2226200 Comparing the bad media-fuelled reputation of e-scooters with real-life user and non-user perceptions: Evidence from Sweden https://trid.trb.org/View/2283500 Wed, 15 Nov 2023 09:19:57 GMT https://trid.trb.org/View/2283500 Using vignettes to explore policy tools for a self-driving transport future https://trid.trb.org/View/2264471 Mon, 23 Oct 2023 15:08:13 GMT https://trid.trb.org/View/2264471 Evaluating skip-stop policy in urban rail transit systems based on passenger cost https://trid.trb.org/View/2255001 Tue, 17 Oct 2023 13:42:34 GMT https://trid.trb.org/View/2255001 Leisure walking in the original compact city: senses, distinction, and rhythms of the bourgeois promenade https://trid.trb.org/View/2244554 Mon, 16 Oct 2023 17:26:23 GMT https://trid.trb.org/View/2244554 Recreational mobility on a busy street: visual studies of alterity by doing jogging and doing dog-walking https://trid.trb.org/View/2244547 Mon, 16 Oct 2023 17:26:23 GMT https://trid.trb.org/View/2244547 Defecation, littering and other acts of public disturbance in pandemic times – A study of a Scandinavian city https://trid.trb.org/View/2233044 Fri, 22 Sep 2023 09:08:16 GMT https://trid.trb.org/View/2233044 Operational analysis and optimization of a water-based municipal solid waste management system with hybrid simulation modeling https://trid.trb.org/View/2233518 Fri, 22 Sep 2023 09:08:15 GMT https://trid.trb.org/View/2233518 Spatiotemporal heterogeneity of the shared e-scooter–public transport relationships in Stockholm and Helsinki https://trid.trb.org/View/2237024 Tue, 19 Sep 2023 09:27:47 GMT https://trid.trb.org/View/2237024 Pedestrians' perceptions of route environments in relation to deterring or facilitating walking https://trid.trb.org/View/2208711 Wed, 13 Sep 2023 10:23:12 GMT https://trid.trb.org/View/2208711 Accessibility and space-time differences in when and how different groups (choose to) travel https://trid.trb.org/View/2219897 Mon, 31 Jul 2023 08:45:45 GMT https://trid.trb.org/View/2219897