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ODOT Research Unit - Active Projects
 
 

SPR 758

Appropriate Width of Filter Strips for Natural Dispersion of Stormwater in Western Oregon 
 
Project Coordinator Matthew Mabey
Research Agency:    Oregon State University
Principal Investigator:   Chad Higgins
Start Date for ODOT:  May 6, 2013
Completion Date for ODOT: August 31, 2015
 
OVERVIEW: 
Infiltration is being emphasized as an important technique for managing stormwater. Dispersion
of highway runoff in roadside filter strips or separate dispersal areas is a cost effective
stormwater management technique that provides both water quality and flow control benefits.
Determining the width of the dispersion area needed to infiltrate the design storm is necessary to
identify the amount of right-of-way needed and if additional BMPs are required. Research to
establish an equation for sizing dispersion areas in western Oregon is needed.

 
OBJECTIVES:    
The objective of this research is to expand the data set and understanding of Washington’s LID
Design Equation” to the point that an equivalent design approach that is applicable to western
Oregon can be developed.

  
Appropriate Width of Filter Strips for Natural Dispersion of Stormwater in Western Oregon Work Plan  
  

Quarterly Reports:

FY 13
FY 14 
FY 15
qtr. 1
 
qtr. 2
 
qtr. 3
 
 

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SPR 760

Multimodal Performance Measures: Developing a Transportation Cost Index
 
Project Coordinator Xiugang (Joe) Li
Research Agency: Portland State University
Principal Investigator: Liming Wang, Jenny Liu
Start Date for ODOT: September 20, 2013
Completion Date for ODOT: April 30, 2015
 
OVERVIEW
Recent federal and state laws are placing increasing emphasis on using comprehensive
transportation performance measures that include mobility, safety, economy, livability, equity,
and environment to guide transportation decision making. Proof-of-concept research in SPR 375
developed a Transportation Cost Index (TCI) for use in comparing transportation performance
outcomes for different modes in common terms. The TCI accomplishes this by building on the
concept of the widely-used Consumer Price Index (CPI). As a result of the logic appeal of the
TCI and the proof-of-concept research, this measure was adopted by the Accessibility Indicator
Development Team (IDT) for the Oregon LCP project. The aim of this research project is to
advance the TCI from the proof-of-concept stage to implementation in transportation
performance measurement and decision-making at the state, MPO, and community levels.
 
OBJECTIVES
The goal of this research is to develop, evaluate, and operationalize the TCI for immediate
implementation in state-wide application as a comprehensive multi-modal performance measure
capable of combining modes, transportation infrastructure and services, and land use
information. To reach this goal, this research aims to subject the TCI prototype developed at
ODOT to a rigorous academic investigation, identify and evaluate data sources, operationalize
and test TCI measure for validity in three locations of different scales in Oregon, and prepare it
for adoption in state-wide applications. 
 
 
FY 14
FY 15 
FY 16
qtr. 1
 
qtr. 2
 
qtr. 3 qtr. 3
 
 
 
 
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SPR 761

 
Evaluation of Weather Based Variable Speed Limit Systems
 
Project Coordinator Jon Lazarus
Research Agency: Portland State University/Western Transportation Institute
Principal Investigator: Robert Bertini/Ahmed Al-Kaisey
Start Date for ODOT: September 5, 2013
Completion Date for ODOT: December 31, 2015
 
OVERVIEW
Increasingly, variable speed limit (VSL) and variable advisory speed (VAS) systems have been
used around the world, and in the U.S., to provide traffic- and weather-responsive guidance for
drivers in order to achieve the goals mentioned above. By sensing the traffic and/or weather
conditions, advisory speed limits can be displayed that are suited to real-time conditions and can
warn drivers about congestion and speed conditions ahead. While shown to be cost-effective,
ATM and specifically VSL do require significant investments in hardware and software, data
collection/management and maintenance. In an environment of limited resources clear criteria
are needed to aid in deployment decisions.
 
Two VSL projects being deployed in Oregon, with five additional systems under various levels
of development in the state. ODOT is currently constructing an ATM Project along OR 217,
which is operating at or above capacity with closely spaced interchanges and crash rates and
congestion higher than regional averages. The OR 217 ATM Project includes variable advisory
speeds (based on measured flows and speeds), posting real time travel times, queue warning, and
a weather responsive curve warning system spanning seven miles of highway.
 
The US 26 and OR 35 Mt. Hood Safety and Traveler information project (67 miles) will install a
VSL and variable message sign (VMS) system to improve safety along this corridor (a large
percentage of crashes occur on snow and ice, linked to inexperienced and overconfident drivers
traveling too fast for conditions). A Road Weather Information System (RWIS) will collect realtime
winter weather information at along US 26 and OR 35 to allow precise conditions to be
monitored. The completed weather-controlled VSL on both corridors will utilize traffic speed
and volume detection, weather information, and road surface condition technology to determine
appropriate speeds at which drivers should be traveling. These advisory or regulatory speeds will
then be displayed on overhead or roadside VMS or dynamic message signs (DMS).
 
OBJECTIVES
The goal of this project is to evaluate the effectiveness of two new active traffic management
(ATM) system projects featuring VSL and VAS components being installed on OR 217 (urban)
and US 26/OR 35 (rural/mountain), to aid in optimizing the operation of these systems as well as
laying the groundwork for future implementations of ATM and VSL systems across the state.
The two systems in Region 1 are the first of potentially many more projects to be implemented.
 
FY 14
FY 15 
FY 16
qtr. 1
 
qtr. 2 qtr. 2
 
qtr. 3 qtr. 3
 
 
 
 
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SPR 762

 
High Strength Steel Reinforcement for Bridges
 
Project Coordinator Tengfei Fu
Research Agency: Oregon State University
Principal Investigator: Andre Barbosa/David Trejo
Start Date for ODOT: September 25, 2013
Completion Date for ODOT: December 31, 2016
 
OVERVIEW
Recent federal and state laws are placing increasing emphasis on using comprehensive
transportation performance measures that include mobility, safety, economy, livability, equity,
and environment to guide transportation decision making. Proof-of-concept research in SPR 375
developed a Transportation Cost Index (TCI) for use in comparing transportation performance
outcomes for different modes in common terms. The TCI accomplishes this by building on the
concept of the widely-used Consumer Price Index (CPI). As a result of the logic appeal of the
TCI and the proof-of-concept research, this measure was adopted by the Accessibility Indicator
Development Team (IDT) for the Oregon LCP project. The aim of this research project is to
advance the TCI from the proof-of-concept stage to implementation in transportation
performance measurement and decision-making at the state, MPO, and community levels.
 
OBJECTIVES
The objective of this research is to generate datasets of key mechanical properties for ASTM
A706 Grade 80 reinforcing steel and modify design equations based on the datasets so that the
high strength reinforcement can be used for structures in seismic regions.
 
 
FY 14
FY 15 
FY 16
qtr. 1
 
qtr. 2 qtr. 2
 
qtr. 3 qtr. 3
 
 
 
 
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SPR 763

Mechanistic Design Data
 
Project Coordinator Norris Shippen
Research Agency: Auburn University
Principal Investigator: David H. Timm
Start Date for ODOT: July 8, 2014
Completion Date for ODOT: July 1, 2016
 
OVERVIEW
ODOT began implementation of Mechanistic design practices and principles starting in
approximately 2003. At the time, implementation was as a secondary evaluation tool in asphalt
concrete pavement design due to uncertainty in the design method precision, lack of ongoing
calibration, and lack of data. Three pavement sites were instrumented across Oregon between
2004 and 2008 to gather data to help in moving the implementation of mechanistic design
practices forward. Data from the sites was collected as part of a previous research project, but
was not completely summarized or analyzed and a large part of the data is currently providing no
useful benefit to ODOT. If these data are to be useful in ODOT’s ongoing mechanistic
pavement design calibration, the data from the instrumented sites needs to be reduced from its
current “raw” format and evaluated.
 
OBJECTIVES
The objective of this research is to reduce and manipulate existing data and to the extent possible
used it to calibrate and improve mechanistic design methods. Because the existing data have not
yet been assessed, the researchers will assess the data and determine whether the existing data
can be beneficial for improving design of pavements. 
 
FY 15
FY 16 
qtr. 1
 
 
qtr. 2
 
qtr. 3 qtr. 3
 
 
 
 
 
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SPR 764

Road Map for Connected Vehicle/Cooperative Systems
 
Project Coordinator Myra Sperley
Research Agency: Portland State University
Principal Investigator: Robert Bertini
Start Date for ODOT: October 28, 2013
Completion Date for ODOT: June 30, 2015
 
OVERVIEW
The U.S. DOT plans to fund future pilot deployments of mobility and environmental related
applications in the coming years—likely including a set of regional pilots as well as smaller,
more self-contained projects focused on priority applications. As connected vehicle research
moves into deployment, state, local and transit agencies, metropolitan planning organizations and
the private sector will start feeling the effects of vehicles and infrastructure with dedicated, short-range wireless communications connectivity at their cores. Along with other states and regions,
ODOT can benefit from preliminary scoping, evaluation, and assessment of the impact of
connected vehicles and infrastructure and a wide range of potential cooperative system
applications. 
 
 
OBJECTIVES
The goal of this project is to lay the groundwork for Oregon to be prepared to lead in the
implementation of a connected vehicle/cooperative systems transportation portfolio, and/or to
avoid being caught by surprise as developments in this area evolve quickly. The project will
assess ODOT’ s current internal mechanisms for addressing connected vehicle/cooperative
systems, scan, review and assess technical maturity of potential connected vehicle/cooperative
system applications, develop preliminary goals, link to prospective connected
vehicle/cooperative systems applications, and refine/rank/prioritize those that fit with potential
ODOT role in advancing/leading these initiatives. identify opportunities for linking ODOT’s
current programs with national and international connected vehicle/cooperative system research,
testing and deployment initiative, and recommend a final shared vision and “road map” for
Oregon's priority connected vehicle/cooperative system applications. 
 
 
FY 14
FY 15 
FY 16
 qtr. 1
 
qtr. 2
 
qtr. 3 qtr. 3
 
 
 
 
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SPR 765

High Strength Steel Bars and Casing in Response to Drilled Shafts
 
Project Coordinator Matthew Mabey
Research Agency: Oregon State University
Principal Investigator: Armin Stuedlein
Start Date for ODOT: February 5, 2014
Completion Date for ODOT: February 15, 2017
 
OVERVIEW
Drilled shafts provide significant geotechnical resistance for support of highway bridges, and are
used throughout the State of Oregon to meet its structural foundation requirements. Due to
changes in construction methods and poor near-surface soils, the use of permanent steel casing
for drilled shaft installation has increased. However, geotechnical design models for axial and
lateral resistance of drilled shafts are largely based on soil-concrete interfaces, not soil-steel
interfaces associated with large diameter steel casing. Owing to the increased understanding of
our regional seismic hazards, the amount of steel reinforcement used in drilled shaft construction
has increased over the past several decades. This creates a new construction concern for
engineers: the increased steel area results in a reduced clearance between adjacent reinforcement
bars in the steel cage, such that concrete has an increased difficulty in penetrating the cage,
increasing the likelihood for voids and defects within the shaft, which can lead to poor structural
and geotechnical performance. The use of high-strength reinforcement steel can lead to
increased clearance within the steel cage, mitigating concreting issues. The use of steel casing
and the amount of steel area control the axial and lateral resistance of the shaft. Thus, existing
approaches need to be evaluated for modern construction methods, and new approaches
developed if necessary to ensure desired performance criteria are met.
 
OBJECTIVES
The objectives of this research are to study the impact of steel casing and high-strength steel
reinforcement on the axial and lateral behavior of full-scale drilled shaft foundation elements and
to evaluate the appropriateness of existing ODOT design procedures. If necessary, new
procedures incorporating the effect of steel casing and high-strength steel reinforcement will be
developed. If selected, the Association of Drilled Shaft Contractors (ADSC) and PacTrans will
contribute effort and funding to help accomplish these objectives. This project will also evaluate
shafts installed at the OSU geotechnical test site 17 years ago by a joint FHWA/ADSC research
venture such that interesting side-by-side geotechnical and structural aging effects can be
determined.  
 
 
FY 14
FY 15 
FY 16
qtr. 1
 
qtr. 2
 
qtr. 3
 
 
 
 
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