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OTREC-RR-11-05 By Miguel Figliozzi
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Reliable urban freight movement is crucial to companies using just-in-time approaches. Routes with long computation times are inefficient , as are those ignoring travel time, while using congested... More > arteries and streets increases costs and exacerbates issues like greenhouse gases, air pollution, noise, and accidents. Mobile phones and routing devices improve driver/scheduler communication, allowing dynamic vehicle reassignment, stop order modification or diversion en-route, but only with fast routing methods. Travel time variation during peak hours is a major problem for models using constant vehicle speeds. Time-dependent routing research is meager and current methods are inadequate for real operations. Faster methods are essential to utilize real time information. This research aims to develop and evaluate new methods for routing in urban areas, emphasizing improved running times for existing methods.< Less
OTREC-RR-10-09 By Miguel Figliozzi
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Increasing freight volumes are adding pressure to the Oregon transportation system. Data accessibility and integration is essential to ensure successful freight planning and consistency across... More > regional partner agencies and planning organizations. The main objectives of this project are: a) to maintain a long-term freight database that would be available for Oregon Universities, state transportation agencies, regional planning agencies, and economic development organizations, b) to integrate freight data into the existing and successfully operating PORTAL system, and c) to monitor freight performance measures.< Less
OTREC-RR-12-10 By Miguel Figliozzi
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Increased urban congestion during peak periods increases logistics costs. In addition, environmental, social, and political pressures to limit the impacts associated with CO2 emissions are mounting... More > rapidly. A key challenge for transportation agencies and businesses is to improve the efficiency of urban freight and commercial vehicle movements while ensuring environmental quality, livable communities, and economic growth. Efforts to analyze and quantify the impacts of congestion and freight public policies on carriers operations and CO2 emissions are hindered by the complexities of vehicle routing problems with time-dependent travel times and the lack of congestion data. This research focuses on the analysis of costs and CO2 emissions for different levels of congestion and time-definitive demands. We use travel time data from an archive of sensors, time-dependent routing algorithms, and problems-instances with different binding constraints to analyze the impacts of congestion on commercial vehicle emissions.< Less
OTREC-RR-12-10 By Miguel Figliozzi
Paperback: $5.38
Ships in 3-5 business days
Increased urban congestion during peak periods increases logistics costs. In addition, environmental, social, and political pressures to limit the impacts associated with CO2 emissions are mounting... More > rapidly. A key challenge for transportation agencies and businesses is to improve the efficiency of urban freight and commercial vehicle movements while ensuring environmental quality, livable communities, and economic growth. Efforts to analyze and quantify the impacts of congestion and freight public policies on carriers operations and CO2 emissions are hindered by the complexities of vehicle routing problems with time-dependent travel times and the lack of congestion data. This research focuses on the analysis of costs and CO2 emissions for different levels of congestion and time-definitive demands. We use travel time data from an archive of sensors, time-dependent routing algorithms, and problems-instances with different binding constraints to analyze the impacts of congestion on commercial vehicle emissions.< Less
OTREC-RR-11-05 By Miguel Figliozzi
Paperback: $6.90
Ships in 3-5 business days
Reliable urban freight movement is crucial to companies using just-in-time approaches. Routes with long computation times are inefficient , as are those ignoring travel time, while using congested... More > arteries and streets increases costs and exacerbates issues like greenhouse gases, air pollution, noise, and accidents. Mobile phones and routing devices improve driver/scheduler communication, allowing dynamic vehicle reassignment, stop order modification or diversion en-route, but only with fast routing methods. Travel time variation during peak hours is a major problem for models using constant vehicle speeds. Time-dependent routing research is meager and current methods are inadequate for real operations. Faster methods are essential to utilize real time information. This research aims to develop and evaluate new methods for routing in urban areas, emphasizing improved running times for existing methods.< Less
OTREC-RR-11-05 By Miguel Figliozzi
eBook (PDF): $0.00
Download immediately.
Reliable urban freight movement is crucial to companies using just-in-time approaches. Routes with long computation times are inefficient , as are those ignoring travel time, while using congested... More > arteries and streets increases costs and exacerbates issues like greenhouse gases, air pollution, noise, and accidents. Mobile phones and routing devices improve driver/scheduler communication, allowing dynamic vehicle reassignment, stop order modification or diversion en-route, but only with fast routing methods. Travel time variation during peak hours is a major problem for models using constant vehicle speeds. Time-dependent routing research is meager and current methods are inadequate for real operations. Faster methods are essential to utilize real time information. This research aims to develop and evaluate new methods for routing in urban areas, emphasizing improved running times for existing methods.< Less
OTREC-RR-11-05 By Miguel Figliozzi
eBook (PDF): $0.00
Download immediately.
Reliable urban freight movement is crucial to companies using just-in-time approaches. Routes with long computation times are inefficient , as are those ignoring travel time, while using congested... More > arteries and streets increases costs and exacerbates issues like greenhouse gases, air pollution, noise, and accidents. Mobile phones and routing devices improve driver/scheduler communication, allowing dynamic vehicle reassignment, stop order modification or diversion en-route, but only with fast routing methods. Travel time variation during peak hours is a major problem for models using constant vehicle speeds. Time-dependent routing research is meager and current methods are inadequate for real operations. Faster methods are essential to utilize real time information. This research aims to develop and evaluate new methods for routing in urban areas, emphasizing improved running times for existing methods.< Less
OTREC-RR-12-11 By Miguel Figliozzi
Paperback: $5.48
Ships in 3-5 business days
This project developed a new methodology to estimate congestion impacts on freight movement, reliability, delays, costs, and emissions. Results suggest that traditional sensors underestimate the... More > impacts of congestion on travel-times and variability. It shows that congestion is not only more costly but also causes large increases in pollutants. This methodology allows planners to incorporate freight performance measures. In the Portland metropolitan region the focus was on developing multi-criteria tools for measuring and analyzing the impacts of freight corridor congestion. On segments along more than 300 miles of Interstate 5 (I-5) the focus was on using multiple data sources – commercial truck GPS, Oregon DOT corridor travel-time loops and incident data - to analyze the impacts of congestion. Freight corridor sections can have different reliability characteristics. A programming logic was developed to identify corridors and estimate localized impacts of travel-time unreliability.< Less
OTREC-RR-12-11 By Miguel Figliozzi
eBook (PDF): $0.00
Download immediately.
This project developed a new methodology to estimate congestion impacts on freight movement, reliability, delays, costs, and emissions. Results suggest that traditional sensors underestimate the... More > impacts of congestion on travel-times and variability. It shows that congestion is not only more costly but also causes large increases in pollutants. This methodology allows planners to incorporate freight performance measures. In the Portland metropolitan region the focus was on developing multi-criteria tools for measuring and analyzing the impacts of freight corridor congestion. On segments along more than 300 miles of Interstate 5 (I-5) the focus was on using multiple data sources – commercial truck GPS, Oregon DOT corridor travel-time loops and incident data - to analyze the impacts of congestion. Freight corridor sections can have different reliability characteristics. A programming logic was developed to identify corridors and estimate localized impacts of travel-time unreliability.< Less
OTREC-RR-10-09 By Miguel Figliozzi
eBook (PDF): $0.00
Download immediately.
Increasing freight volumes are adding pressure to the Oregon transportation system. Data accessibility and integration is essential to ensure successful freight planning and consistency across... More > regional partner agencies and planning organizations. The main objectives of this project are: a) to maintain a long-term freight database that would be available for Oregon Universities, state transportation agencies, regional planning agencies, and economic development organizations, b) to integrate freight data into the existing and successfully operating PORTAL system, and c) to monitor freight performance measures.< Less