20 research outputs found

    Freight Efficiency Strategies: Information Technology

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    This White Paper presents recommendations for using information technology solutions to increase the efficiency of California\u2019s multi modal freight system. These recommendations resulted from a consensus based process by working group committee members. The authors address two problems: information problems in the goods movement supply chain, and information problems in statewide trucking

    Seismic Forces in Ancillary Components Supported on Piers and Wharves

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    This paper presents a simple procedure to estimate seismic forces in ancillary components (secondary systems) supported on marine structures such as piers, wharves, and marine oil terminals (primary systems). Since many such marine structures can be idealized as single-degree-of-freedom (SDOF) systems, this study uses a simple linear-elastic model with two DOF, one representing the marine structure and the other representing the ancillary component. This study shows that acceleration at the base of the secondary system is approximately equal to spectral acceleration at the fundamental period of the primary system. It also proposes a formula, which is an improvement over current ASCE 7-10 recommendations, to estimate acceleration amplification in the secondary system due to its flexibility when mass and period ratios of the secondary and primary systems are known. The procedure in this paper is strictly applicable to marine structures for which primarily a single mode contributes to seismic response

    Request for Proposals Published

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    proposals from qualified entities to develop photovoltaic solar power systems within the Port of Los Angeles under the City of Los Angeles Department of Water & Power Feed-in Tariff Set Pricing Program. These services shall commence after a contract is approved by the Board of Harbor Commissioners, the Board of Water & Power Commissioners, and the Los Angeles City Council. Instructions and forms to be used in preparing the proposal are found in the information included in the Request for Proposals (RFP)

    Disparities in Exposure to Automobile and Truck Traffic and Vehicle Emissions Near the Los Angeles–Long Beach Port Complex

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    Objectives. We assessed how traffic and mobile-source air pollution impacts are distributed across racial/ethnic and socioeconomically diverse groups in port-adjacent communities in southern Los Angeles County, which may experience divergent levels of exposure to port-related heavy-duty diesel truck traffic because of existing residential and land use patterns. Methods. We used spatial regression techniques to assess the association of neighborhood racial/ethnic and socioeconomic composition with residential parcel-level traffic and vehicle-related fine particulate matter exposure after accounting for built environment and land use factors. Results. After controlling for factors associated with traffic generation, we found that a higher percentage of nearby Black and Asian/Pacific Islander residents was associated with higher exposure, a higher percentage of Hispanic residents was associated with higher traffic exposure but lower vehicle particulate matter exposure, and areas with lower socioeconomic status experienced lower exposure. Conclusions. Disparities in traffic and vehicle particulate matter exposure are nuanced depending on the exposure metric used, the distribution of the traffic and emissions, and pollutant dispersal patterns. Future comparative research is needed to assess potential disparities in other transportation and goods movement corridors
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