Wolfgang HablaKumai KokashAsa LoefgrenAnna Straubinger...
104707.1-104707.20页
查看更多>>摘要：Based on survey data among citizens from Germany and Sweden, this paper examines the individual support for climate-related passenger transport policy measures. Our descriptive statistics reveal that pull policy measures are more strongly supported in both countries than push policy measures and bans. Our econometric analysis focuses on the relevance of economic self-interest, measured by indicators that are in line with the corresponding policy measure. Using multivariate ordered probit models, we show for both countries that citizens who are negatively affected by car-, air travel-, and bicycle-related policy measures are significantly more likely to disagree with them, while citizens who benefit from them are significantly more likely to support them. The corresponding estimated probability effects are substantial. For example, citizens who own or use a means of transport are estimated to be up to 21 percentage points less likely to support policy measures that negatively affect their ownership or use.
Alexander SchmausFelix CreutzigNicolas KochFlorian Nachtigall...
104726.1-104726.15页
查看更多>>摘要：Shared pooled mobility has the potential to reduce both the necessary number of private vehicles and the total driven distance. Here, we use logged car trips in Berlin as input for ride-pooling simulations to analyze the technical potential - assuming a complete switch from private to shared mobility. We measure the share of sharable trips, average vehicle occupancy, relative passenger travel time, and relative driven distance compared to individual driving. In the entire area of Berlin, we observe that a ride-pooling system with 26,500 vehicles could replace all 1,09 million private vehicles and their trips. The travel time is 55% higher, the average vehicle occupancy increases 2.1-fold, and the overall distance traveled is reduced by 61%. Our results demonstrate that system-wide urban efficiency and quality of life benefits - elimination of congestion and gain of public space for people - would come at higher time costs for commuters.
查看更多>>摘要：Traffic noise significantly impacts public health, necessitating precise evaluation for effective monitoring, particularly at intersections. This study proposes a novel framework using roadside light detection and ranging (LJDAR) sensor to assess traffic noise, marking the first application of LiDAR-based background point cloud segmentation for noise evaluation. First, a point cloud segmentation method was introduced, leveraging integrated algorithms to identify buildings and vegetation. Then, a noise propagation model was developed, incorporating direct, diffractive, and reflective paths to evaluate environmental effects. In addition, noise attenuation by vegetation was quantified using point cloud density. Finally, noise maps were generated to visualize intersection noise levels. Experimental results demonstrated the segmentation method achieved an accuracy of 80.63%. The evaluation achieved a mean absolute error (MAE) of 1.24 dB and a coefficient of determination of 0.78 compared to sound level meter measurements, showcasing the model's effectiveness and potential in evaluating traffic noise.
查看更多>>摘要：The rise of emerging mobility services (EMS), particularly ridehailing and micromobility, has transformed urban transportation and challenged the traditional public transit (PT) system. This has led to coopetition dynamics between EMS and PT, characterized by supplementary, complementary, and competitive interactions, which introduce complexity to discussions on equity, cost, and sustainability. The long-term impact will also depend on how EMS is integrated with existing PT and how cities manage these challenges. This study addresses these gaps by conducting a systematic literature review of EMS and PT coopetition dynamics, focusing on the equity implications of accessibility. The findings reveal that ridehailing primarily competes with PT while complementing it during disruptions and in areas with limited service; however, it disproportionately benefits affluent areas, exacerbating inequities. Conversely, micromobility supplements PT as first- and last-mile solutions while also competing in city centers. This study also offers topology and pathways from coopetition to equitable EMS and PT integration.
查看更多>>摘要：Hydrogen fuel cell vehicles (HFCV) emerge as the promising alternative to internal combustion engine vehicles (ICEV). This study focuses on hydrogen fuel cell buses (HFCB) and assesses carbon footprint (CF) across the life cycle. During the production phase, the average carbon emissions of HFCB are 84055.91 kgCO_2eq, significantly higher than the 43881.92 kgCO_2eq of ICEV. During the usage phase, HFCB's emissions are significant, but the cleanliness of hydrogen production methods can significantly reduce the emissions. In the recycling phase, the average carbon reduction achieved by HFCB is 12897.11 kgCO_2eq, surpassing the 10746.24 kgCO_2eq reduction of ICEV. However, it is not sufficient to offset the carbon emissions generated throughout the life cycle of HFCB. The overall lifecycle CF of HFCB exceeds that of ICEV. Finally, with changes in power infrastructure and advancements in hydrogen production, HFCB will contribute positively to carbon neutrality, accelerating the achievement of the 2060 carbon neutrality target.
Miguel Angel CasquetAlessandro SciulloHaoran WangSonia Quiroga...
104757.1-104757.14页
查看更多>>摘要：The adoption of environmentally friendly transportation is essential for sustainable development. Although numerous policies promote public bus transport, there has been insufficient analysis of their actual impact. This article presents a new framework that integrates demand, supply and electricity consumption using the A-S-I-F-E (Activity, Shift in modal share, change in Intensity, change in Fuel and Electricity generation). The study examines the impact of a transport policy on carbon emissions through a case study on the renovation and electrification of the bus fleet in the Piedmont Region. A pseudo-panel approach, based on household surveys from 2013 to 2022, is employed. Results indicate a significant increase in public bus transport following the application of the Synthetic Difference-in-Difference (SDiD) method. In terms of emissions, reductions in CO, NO_x, CO_2, PM_(2.5) and CH_4 were observed, while emissions of NMVOCs and N_2O increased. Consequently, combining demand- and supply-side should be promoted to reduce emissions effectively.
查看更多>>摘要：Highways account for a significant share of transportation-related CO_2 emissions, yet policy interventions in mitigating these emissions remain underexplored. This paper investigates the impact of toll discount policies and network expansions on highway carbon emissions, drawing on long-term Electronic Toll Collection (ETC) data. We propose a bottom-up framework for estimating highway emissions and use a combination of time series decomposition and causal inference methods to isolate policy impacts. Our results reveal that toll discounts exert a significant and positive effect on highway carbon emissions, the shift of freight traffic onto highways reduces overall system-wide emissions: on average, each kilometer of discounted highway travel yields a net reduction of 52 g of CO_2 per day in the transportation network. These findings underscore both the potential of policy-driven highway utilization to lower total carbon footprints and the importance of carefully calibrated policies to manage induced passenger travel.
Vincenzo CusatiMario Di StasioGabriele LucciQinyin Zhang...
104759.1-104759.22页
查看更多>>摘要：This study evaluates the direct operating costs (DOC) and economic feasibility of the Ampaire Eco Caravan, a hybrid-electric retrofit of the Cessna 208B Grand Caravan. A specialized cost methodology was developed, incorporating fuel and energy consumption, acquisition costs, maintenance, and operational expenses. Results show the Eco Caravan reduces fuel consumption by 50% due to its hybrid-electric propulsion system, which integrates a fuel-efficient piston engine and an electric motor during high-power phases. Additionally, maintenance costs decrease by 14%, and for a 100-nautical-mile mission, operational costs are 9% lower than the conventional model. However, higher acquisition costs and reduced block speed increase total DOC by 3%. Scenario analyses highlight the impact of fuel prices, electricity costs, retrofit expenses, and airport charges, emphasizing the critical role of policy incentives. These findings suggest hybrid-electric aircraft can be viable with technological advancements and regulatory support.
查看更多>>摘要：The construction of transportation infrastructure, vehicle emissions, and other transportation-related activities may lead to a series of ecological and environmental problems. For example, the development of road transportation affects wildlife by altering and isolating habitats and populations, deterring the movement of wildlife, and resulting in extensive wildlife mortality. Therefore, roadkill has dramatically increased (Coffin, 2007). Furthermore, high intensity of dense and black hardened pavement causes a series of environmental impacts, including traffic noise, runoff pollution, roadside soil degradation, air pollution, light pollution, urban heat island effect, etc. (Van Dam et al., 2015). In 2003, the concept of road ecology was proposed by Professor Richard T.T. Forman of Harvard University for the first time, which led to the increasing awareness of the ecological effects of road transportation (Forman, 2004). After that period, road ecology, as a subdiscipline of ecology, flourished worldwide.
查看更多>>摘要：Ride-pooling characteristics, especially its routes' characteristics have rarely been studied in the context of carbon emission reduction. This study proposes a route classification system and develops a refined version of the MOVES model, incorporating data from the Amap API. The model accounts for speed distribution, road hierarchy, and vehicle type to assess the impact of ride-pooling on carbon emissions in Suzhou, China. The results indicate that only 3.5 % of ride-hailing trips are pooled, mainly within the 5-15 km range, achieving a 22.54 % carbon reduction compared to non-pooled trips. The "overlapping route with all passengers" type achieves the highest reduction of 44.73 %. Compared to hybrid and electric vehicles, fuel-powered vehicles exhibit significantly higher emissions, with potential carbon savings of up to 8000 g per trip on longer routes when ride-pooling is implemented. Full ride-pooling adoption could cut Suzhou's annual emissions by 30,000 tons, equivalent to a 19.14 % reduction in total ride-hailing emissions. These findings highlight the critical role of promoting ride-pooling and optimizing longdistance, high-overlap routes to maximize carbon reductions.
NETL
NSTL
Elsevier