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Technical Report

Analyzing the Long-Term Impacts of COVID-19 Disruption on Travel Patterns

 
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Publication Date: 2020
Summary:

The rapid spread of COVID-19 pandemic in the U.S. spurred many state governments to take extensive actions for social distancing and issue stay-at-home orders to reduce the spread of the virus. Washington State and all other States in the PacTrans region have issued stay-at-home orders that include school closures, telecommuting, bars/restaurants closures, and group gathering bans, among others. These actions create significant changes to daily life and while some travel patterns will gradually restore by the end of outbreak, some may remain changed for a much longer period.

Behaviors that may see a lasting response include commuting, grocery shopping, business meetings, and even social interactions. Working from home for 2-3 months may change people’s attitudes toward telecommuting, and some may continue to do so a few days a week once the stay-at-home orders are lifted. Some employers may also shift their telecommute policies and provide/encourage working from home. In recent years, with the growth of e-commerce, many grocery stores had started to offer home deliveries; however, online grocery shopping experienced a fast and sudden boom during the pandemic. This has resulted in quick service adoption, and therefore some people may continue to do online grocery shopping once things go back to normal. Moreover, as people shift to online grocery shopping, they may proactively make a list and place orders less frequently compared to them going to store, resulting in fewer shopping trips. Some business meetings and even personal gatherings may also move online as people learn about and try alternate ways of communicating during the outbreak. Some may also consider enrolling in distant learning programs instead of attending in-person educational programs. There may also be significant changes in modes of travel. Some transit commuters may choose other modes of transportation for a while, and people may choose to drive or bike instead of taking a ride-hailing trip.

The goal of this research is to understand how COVID-19 disruption has affected people’s activity and travel patterns during the pandemic, and how these changes may persist in a post-pandemic era.

Authors: Dr. Andisheh Ranjbari, Parastoo Jabbari, Don MacKenzie
Recommended Citation:
Mackenzie D., Jabbari P., Ranjbari A. Analyzing the Long-Term Impacts of COVID-19 Disruption on Travel Patterns. Pacific Northwest Transportation Consortium (PacTrans). 2020. http://hdl.handle.net/1773/46655.
Technical Report

Developing a GPS-Based Truck Freight Performance Measure Platform

 
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Publication: TransNow, Transportation Northwest, U.S. Department of Transportation, University Transportation Centers Program.
Publication Date: 2010
Summary:

Although trucks move the largest volume and value of goods in urban areas, relatively little is known about their travel patterns and how the roadway network performs for trucks. The Washington State Department of Transportation (WSDOT), Transportation Northwest (TransNow) at the University of Washington, and the Washington Trucking Associations have partnered on a research effort to collect and analyze global positioning system (GPS) truck data from commercial, in-vehicle, truck fleet management systems used in the central Puget Sound region. The research project is collecting commercially available GPS data and evaluating their feasibility to support a state truck freight network performance monitoring program.

WSDOT is interested in using this program to monitor truck travel times and system reliability and to guide freight investment decisions. The researchers reviewed truck freight performance measures that could be extracted from the data and that focused on travel times and speeds, which, analyzed over time, determine a roadway system’s reliability. The utility of spot speeds and the GPS data, in general, was evaluated in a case study of a three-week construction project on the Interstate-90 bridge. The researchers also explored methods for capturing regional truck travel performance.

Although trucks move the largest volume and value of goods in urban areas, relatively little is known about their travel patterns and how the roadway network performs for trucks. Global positioning systems (GPS) used by trucking companies to manage their equipment and staff and meet shippers’ needs capture truck data that are now available to the public sector for analysis. The Washington State Department of Transportation (WSDOT), Transportation Northwest
(TransNow) at the University of Washington (UW), and the Washington Trucking Associations (WTA) have partnered on a research effort to collect and analyze GPS truck data from commercial, in-vehicle, truck fleet management systems used in the central Puget Sound region. The research project is collecting commercially available GPS data and evaluating their feasibility to support a state truck freight network performance monitoring program. WSDOT is interested in using this program to monitor truck travel times and system reliability and to guide freight investment decisions.

  • The success of the truck freight performance measurement program will depend on developing the capability to
    efficiently collect and process GPS devices’ output
    extract useful truck travel time and speed, roadway location, and stop location information and
    protect the identity of the truckers and their travel information so that business-sensitive information is not released.

While earlier studies have evaluated commercial vehicles’ travel characteristics by using GPS devices, these researchers did not have access to commercial fleet data and had to estimate corridor travel speeds from a limited number of portable GPS units capable of making frequent (1-to-60-second) location reads (Quiroga and Bullock 1998, Greaves and Figliozzi 2008, Due and Aultman-Hall 2007). This read frequency permitted a fine-grained analysis of truck movements on specific segments of the road network but did not provide enough data points to reliably track regional or corridor network performance.

This research project is taking a different approach. The data analyzed in this project are drawn from GPS devices installed to meet the trucking sector’s fleet management needs. So the truck locations are collected less frequently (typically every 5 to 15 minutes) but are gathered from a much larger number of trucks over a long period of time. The researchers are collecting data from 2,000 to 3,000 trucks per day for one year in the central Puget Sound region.

This report discusses the steps taken to build, clean, and test the data collection and analytic foundation from which the UW and WSDOT will extract network-based truck performance statistics. One of the most important steps of the project has been to obtain fleet management GPS data from the trucking industry. Trucking companies approached by WSDOT and the UW at the beginning of the study readily agreed to share their GPS data, but a lack of technical support from the
firms made data collection difficult. The researchers overcame that obstacle by successfully negotiating contracts with GPS and telecom vendors to obtain GPS truck reads in the study region. The next challenge was to gather and format the large quantities of data (millions of points) from different vendors’ systems so that they could be manipulated and evaluated by the project team. Handling the large quantity of data meant that data processing steps had to be automated,
which required the development and validation of rule-based logic that could be used to develop algorithms.

Because a truck performance measures program will ultimately monitor travel generated by trucks as they respond to shippers’ business needs, picking up goods at origins (O) and dropping them off at destinations (D), the team developed algorithms to extract individual truck’s O/D information from the GPS data. The researchers mapped (geocoded) each truck’s location (as expressed by a GPS latitude and longitude) to its actual location on the Puget Sound region’s roadway
network and to traffic analysis zones (TAZs) used for transportation modeling and planning.

The researchers reviewed truck freight performance measures that could be extracted from the data and that focused on travel times and speeds, which, analyzed over time, determine a roadway system’s reliability. Because the fleet management GPS data from individual trucks typically consist of infrequent location reads, making any one truck an unreliable probe vehicle, the researchers explored whether data from a larger quantity of trucks could compensate for infrequent location reads. To do this, the project had to evaluate whether the spot (instantaneous) speeds recorded by one truck’s GPS device could be used in combination with spot speeds from other trucks on the same portion of the roadway network.

The utility of spot speeds and the GPS data in general was evaluated in a case study of a three-week construction project on the Interstate-90 (I-90) bridge. The accuracy of the spot speeds was then validated by comparing the results with speed data from WSDOT’s freeway management loop system (FLOW).

The researchers also explored methods for capturing regional truck travel performance. The approach identified zones that were important in terms of the number of truck trips that were generated. Trucks’ travel performance as they traveled between these economic zones could then be monitored over time and across different times of day.

Authors: Dr. Ed McCormack, Xiaolei Ma, Charles Klocow, Anthony Curreri, Duane Wright
Recommended Citation:
McCormack, Edward D., Xiaolei Ma, Charles Klocow, Anthony Curreri and Duane Wright. “Developing a GPS-Based Truck Freight Performance Measure Platform.” (2010).
Technical Report

Cross Border Transportation Patterns at the Western Cascade Gateway and Trade Corridor: Implications for Mitigating the Impact of Delay on Regional Supply Chains

 
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Publication: Western Washington University Border Policy Research Institute
Publication Date: 2008
Summary:

This report presents a commercial vehicle profile of transportation patterns and a commodity profile of the primary border crossing along the Western Cascade border region of southwest British Columbia, Canada, and northwest Washington, United States, in particular the corridor between the urban areas of Vancouver, British Columbia, and Seattle, Washington.

Because of the larger trade volumes along the eastern portion of the U.S.-Canadian border between Michigan, New York, and Ontario, trade research on the northern U.S. border has typically focused on trade along the eastern portion of the border between Michigan, New York, and Ontario, as well as on immigration and customs issues along the southern border with Mexico. As a result, less attention has been given to the western portion of the U.S./Canada border.

This research begins to fill that gap with both a description of regional trade and a description of current delay patterns, consequences of delay, and causes of delay. Using four data sources for comparison—a Global Positioning System (GPS) freight carrier border delay data set, a commercial volume data set (BC MoT), a detailed border operations survey data set, and manifest sampling (WCOG)—the authors consider the linkages among volume, delay, border operations, commercial vehicle origin/destination, and commodities carried to create a commercial vehicle profile at the Cascade Gateway. The data also allow the authors to demonstrate transportation patterns at this gateway and along the trade corridor, and to show that they are very regional in nature.

This research will benefit both public and private stakeholders who are interested in understanding cross-border commercial vehicle commodity flows and transportation patterns in the Cascade gateway and trade corridor, as well as the profile of delay experienced at the Pacific Highway commercial border crossing. Such an understanding can aid in the development of solutions to mitigate border delay and its impacts.

Authors: Dr. Anne Goodchild, Li Leung, Susan Albrecht
Recommended Citation:
Goodchild, A., Albrecht, S., & Leung, L. (2008). Cross Border Transportation Patterns at the Western Cascade Gateway and Trade Corridor: Implications for Mitigating the Impact of Delay on Regional Supply Chains (Research Report No. 6).