University of Washington

19 2014-2015 Annual Report • Project: Locating Fast Charging Stations for Safe and Reliable Intercity Electric Vehicle Travel in Washington • PI: Don MacKenzie (UW), dwhm@uw.edu The goal of this work is to identify high-value locations for public DCFC investment based on (1) high level of expected demand based on EV ownership and long distance travel patterns, and (2) high potential to spur further EV adoption. We working with WSDOT to acquire origin-destination data on long-distance vehicle trips in Washington state, and Department of Licensing data on the numbers of EVs and of all vehicles registered in each ZIP code across the state. We are using these data to develop an O-D matrix for EV trips in the state, and the expected level of EV traffic along each highway segment, if recharging were not an obstacle to long-distance EV travel. Then we are assigning these trips to the highway network based on travel times and costs. From these results we will generate a map to visualize the potential level of EV traffic along each highway segment. This map will help WSDOT to prioritize investments so that current EV owners can safely and reliably travel between cities using their EVs. Finally, we are also developing a statistical model of EV adoption rate at the ZIP code level, based on residents' demographics (education level, race, income, etc.). • Project: Safe Truck Parking in PacTrans Interstate Corridors: I-5 and I-90 • PI: Anne Goodchild (UW), annegood@uw.edu This project will begin with a research scan of online reports to describe the lack of truck parking in high demand locations in states along the Interstate 5 and Interstate 90 truck corridors in the PacTrans region, and in select metropolitan areas, cities and ports on those corridors such as the Cities of North Bend and Fife in Washington, Boise, Idaho and near Portland, Oregon. Then we will develop a white paper examining future trends and factors that may intensify the problem, such as growth in the trucking industry along interstate corridors, current hours of service limitations and potential future changes, and locations of severe weather conditions that regularly close these interstates in mountainous regions. Original research will be conducted through on-site surveys of truck drivers at high-demand rest stops (North Bend and Sumner in Washington are candidates) to determine (a) origin of trip; (b) destination of trip; and (c) drivers' expert opinions of safety issues related to the lack of truck parking where needed. The origin and destination information will help quantify the tie between truck parking issues in Washington State and the PacTrans region, as the study's working hypothesis is that most trucks parking overnight near the interstate system are based in other states. Providing data to support or refute this connection will be invaluable in determining the beneficiaries of building and maintaining public and private truck parking rest stops. To complete this project, the research team will create a GIS map of public and private truck parking centers on the I-5 and I-90 corridors in the PacTrans region. • Project: Acquisition of a Vardoulakis-Type Plane Strain Device for Advanced Testing of Soils • PI: T. Matthew Evans (OSU), matt.evans@oregonstate.edu It is well-known that all three principal stresses play a role in the stress-strain-strength-volume response of solids and granular materials, yet conventional triaxial compression tests and direct shear tests are typically used for the determination of design parameters for granular materials, even when field conditions may be plane strain (e.g., long embankments, retaining structures, shear zones in landslides). That is, despite the ubiquity of plane strain conditions in the field, there is a scarcity of plane strain laboratory data because there are only a few devices capable of making these measurements. In this work we will seek to acquire and assemble a used Vardoulakis-type plane strain device from the University of Southern California and to subsequently use it to perform PS compression tests on standard sands to confirm operability. This device will provide us an opportunity to

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