Unintended environmental impacts of nighttime freight logistics activities

Nakul Sathaye, Robert Harley, Samer Madanat

    Research output: Contribution to journalArticle

    Abstract

    In recent years, the reduction of freight vehicle trips during peak hours has been a common policy goal. To this end, policies have been implemented to shift logistics operations to nighttime hours. The purpose of such policies has generally been to mitigate congestion and environmental impacts. However, the atmospheric boundary layer is generally more stable during the night than the day. Consequently, shifting logistics operations to the night may increase 24-h average concentrations of diesel exhaust pollutants in many locations. This paper presents realistic scenarios for two California cities, which provide diesel exhaust concentration and human intake estimates after temporal redistributions of daily logistics operations. Estimates are made for multiple redistribution patterns, including from 07:00-19:00 to 19:00-07:00, similar to daytime congestion charging polices, and from 03:00-18:00 to 18:00-03:00, corresponding to the PierPASS program at the ports of Los Angeles and Long Beach. Results for these two redistribution scenarios indicate that 24-h average exhaust concentrations would increase at most locations in California, and daily human intake is likely to worsen or be unimproved at best. These results are shown to be worse for inland than coastal settings, due to differences in meteorology. Traffic congestion effects are considered, using a new graphical method, which depicts how off-peak policies can be environmentally improving or damaging, depending on traffic speeds and meteorology.

    Original languageEnglish (US)
    Pages (from-to)642-659
    Number of pages18
    JournalTransportation Research Part A: Policy and Practice
    Volume44
    Issue number8
    DOIs
    StatePublished - Oct 1 2010

    Fingerprint

    redistribution
    Environmental impact
    Logistics
    environmental impact
    meteorology
    Meteorology
    logistics
    scenario
    Atmospheric boundary layer
    Traffic congestion
    traffic congestion
    Law enforcement
    Beaches
    pollutant
    police
    traffic
    Freight
    Redistribution
    Scenarios
    Congestion

    Keywords

    • Atmospheric dispersion
    • City logistics
    • Freight policy
    • Nighttime operations
    • Off-peak
    • Truck traffic

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Transportation
    • Management Science and Operations Research

    Cite this

    Unintended environmental impacts of nighttime freight logistics activities. / Sathaye, Nakul; Harley, Robert; Madanat, Samer.

    In: Transportation Research Part A: Policy and Practice, Vol. 44, No. 8, 01.10.2010, p. 642-659.

    Research output: Contribution to journalArticle

    @article{d1af5ca2ce6644a18f59d7ea7451f554,
    title = "Unintended environmental impacts of nighttime freight logistics activities",
    abstract = "In recent years, the reduction of freight vehicle trips during peak hours has been a common policy goal. To this end, policies have been implemented to shift logistics operations to nighttime hours. The purpose of such policies has generally been to mitigate congestion and environmental impacts. However, the atmospheric boundary layer is generally more stable during the night than the day. Consequently, shifting logistics operations to the night may increase 24-h average concentrations of diesel exhaust pollutants in many locations. This paper presents realistic scenarios for two California cities, which provide diesel exhaust concentration and human intake estimates after temporal redistributions of daily logistics operations. Estimates are made for multiple redistribution patterns, including from 07:00-19:00 to 19:00-07:00, similar to daytime congestion charging polices, and from 03:00-18:00 to 18:00-03:00, corresponding to the PierPASS program at the ports of Los Angeles and Long Beach. Results for these two redistribution scenarios indicate that 24-h average exhaust concentrations would increase at most locations in California, and daily human intake is likely to worsen or be unimproved at best. These results are shown to be worse for inland than coastal settings, due to differences in meteorology. Traffic congestion effects are considered, using a new graphical method, which depicts how off-peak policies can be environmentally improving or damaging, depending on traffic speeds and meteorology.",
    keywords = "Atmospheric dispersion, City logistics, Freight policy, Nighttime operations, Off-peak, Truck traffic",
    author = "Nakul Sathaye and Robert Harley and Samer Madanat",
    year = "2010",
    month = "10",
    day = "1",
    doi = "10.1016/j.tra.2010.04.005",
    language = "English (US)",
    volume = "44",
    pages = "642--659",
    journal = "Transportation Research, Part A: Policy and Practice",
    issn = "0965-8564",
    publisher = "Elsevier Limited",
    number = "8",

    }

    TY - JOUR

    T1 - Unintended environmental impacts of nighttime freight logistics activities

    AU - Sathaye, Nakul

    AU - Harley, Robert

    AU - Madanat, Samer

    PY - 2010/10/1

    Y1 - 2010/10/1

    N2 - In recent years, the reduction of freight vehicle trips during peak hours has been a common policy goal. To this end, policies have been implemented to shift logistics operations to nighttime hours. The purpose of such policies has generally been to mitigate congestion and environmental impacts. However, the atmospheric boundary layer is generally more stable during the night than the day. Consequently, shifting logistics operations to the night may increase 24-h average concentrations of diesel exhaust pollutants in many locations. This paper presents realistic scenarios for two California cities, which provide diesel exhaust concentration and human intake estimates after temporal redistributions of daily logistics operations. Estimates are made for multiple redistribution patterns, including from 07:00-19:00 to 19:00-07:00, similar to daytime congestion charging polices, and from 03:00-18:00 to 18:00-03:00, corresponding to the PierPASS program at the ports of Los Angeles and Long Beach. Results for these two redistribution scenarios indicate that 24-h average exhaust concentrations would increase at most locations in California, and daily human intake is likely to worsen or be unimproved at best. These results are shown to be worse for inland than coastal settings, due to differences in meteorology. Traffic congestion effects are considered, using a new graphical method, which depicts how off-peak policies can be environmentally improving or damaging, depending on traffic speeds and meteorology.

    AB - In recent years, the reduction of freight vehicle trips during peak hours has been a common policy goal. To this end, policies have been implemented to shift logistics operations to nighttime hours. The purpose of such policies has generally been to mitigate congestion and environmental impacts. However, the atmospheric boundary layer is generally more stable during the night than the day. Consequently, shifting logistics operations to the night may increase 24-h average concentrations of diesel exhaust pollutants in many locations. This paper presents realistic scenarios for two California cities, which provide diesel exhaust concentration and human intake estimates after temporal redistributions of daily logistics operations. Estimates are made for multiple redistribution patterns, including from 07:00-19:00 to 19:00-07:00, similar to daytime congestion charging polices, and from 03:00-18:00 to 18:00-03:00, corresponding to the PierPASS program at the ports of Los Angeles and Long Beach. Results for these two redistribution scenarios indicate that 24-h average exhaust concentrations would increase at most locations in California, and daily human intake is likely to worsen or be unimproved at best. These results are shown to be worse for inland than coastal settings, due to differences in meteorology. Traffic congestion effects are considered, using a new graphical method, which depicts how off-peak policies can be environmentally improving or damaging, depending on traffic speeds and meteorology.

    KW - Atmospheric dispersion

    KW - City logistics

    KW - Freight policy

    KW - Nighttime operations

    KW - Off-peak

    KW - Truck traffic

    UR - http://www.scopus.com/inward/record.url?scp=77955926354&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=77955926354&partnerID=8YFLogxK

    U2 - 10.1016/j.tra.2010.04.005

    DO - 10.1016/j.tra.2010.04.005

    M3 - Article

    VL - 44

    SP - 642

    EP - 659

    JO - Transportation Research, Part A: Policy and Practice

    JF - Transportation Research, Part A: Policy and Practice

    SN - 0965-8564

    IS - 8

    ER -