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ODOT Research Unit - Active Projects

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
The goal of this project is to evaluate the effectiveness of two new active traffic management
(ATM) system projects featuring Variable speed limit (VSL) and Variable advisory speed (VAS) components being installed on OR 217 (urban) and US 26/OR 35 (rural/mountain), to aid in optimizing the operation of these systems, laying the groundwork for future implementations of Active Traffic Management (ATM), and VSL systems across the state.
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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
ODOT began implementation of Mechanistic design practices and principles and was used as a secondary evaluation tool in asphalt concrete pavement design. 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. 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.
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SPR 765

High Strength Steel Bars and Casing in Response to Drilled Shafts
Project Coordinator Kira Glover-Cutter
Research Agency: Oregon State University
Principal Investigator: Armin Stuedlein
Start Date for ODOT: February 5, 2014
Completion Date for ODOT: February 15, 2017
Due to changes in construction methods and poor near-surface soils, the use of permanent steel casing
for drilled shaft installation has increased. 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, 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.
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