| ODOT Reseach Unit - Active Projects |
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| SPR 638 |
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Wildlife Movement Study
| Project Coordinator: |
Matthew Mabey |
| Research Agency: |
USGS |
| Principal Invest: |
John Risley, Glenn Hess |
| Start Date for ODOT: |
July 15, 2005 |
| Completion Date for ODOT: |
June 30, 2010 |
BACKGROUND:
Fish Passage, Temporary Water Management and Storm water Quality designs all require the use of low flows at a range of probabilities. The current readily available flow data does not extend to flows of appropriate probability.
Fish passage, stream restoration, and culvert projects use the exceedance probability of daily flows to estimate flows for fish habitat simulation and for Temporary Water Management (pumps, temp pipes, etc) during in-water construction. The work required determining these flows from daily stream flow data on a project by project basis is technically difficult and very time consuming.
OBJECTIVES:
The major goal of the proposed project is to provide updated flow information and Web-based tools required for protecting, managing, and developing water-resources in Oregon. Specific project objectives include:
Station flow statistics: Compute flow statistics for unregulated USGS and non-USGS flow gauging stations in Oregon, and Flow statistical models: Develop regional regression equations for estimating flow statistics for sites on ungauged streams in Oregon.
Web based user interface: Incorporate these Oregon regression equations and consumptive use data into StreamStats, an automated national Web-based application, so they are readily accessible.
PROPOSED ACTIVITIES:
This study encompasses the area along US 97 between Bend and Crescent and involves equipping 100 – 130 mule deer with GPS radio telemetry collars and collecting movement data for a two-year period.
Data from this study would be analyzed along with road kill data collected by ODOT since 1972 and existing land use and land management information. A final report would be written to include recommendations for local jurisdiction’s, resource agency’s, and ODOT’s use in transportation system development, land use and resource management, and policy development in an effort to protect known migration corridors. Results from the study may also provide groundwork for other highways in the state that are experiencing wildlife-vehicle conflicts.
WILDLIFE MOVEMENT STUDY WORK PLAN
Quarterly Reports:
FY 06
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FY 07
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FY 08
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FY 09
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FY 10
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FY 11
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| SPR 642 |
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Mechanistic Pavement Design Input Parameters
Project Coordinator:
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Norris Shippen
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Research Agency:
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Oregon State University
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Principal Investigator:
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Todd V. Scholz
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Start Date for ODOT:
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October, 2005
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End Date for ODOT:
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February 28, 2008
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BACKGROUND:
Current national pavement design procedures are outdated and typically conservative for the traffic volumes on most of the NHS highways in Oregon. The current 1993 AASHTO Pavement Design Procedure is empirically based and was developed in the 1960’s. AASHTO is in the process of developing a new design procedure that is mechanistic-empirical based. The new design procedure will require ODOT to develop new inputs and calibrate the procedure to local conditions and materials. An ODOT research project is currently underway for the input parameters for AC strength, dynamic modulus. Other inputs required in the new design procedure include aggregate base and subgrade soil properties, calibration of failure criteria and functions to local conditions, AC mix volumetric properties and climatic data
OBJECTIVE:
The objective of this research project is to develop the appropriate inputs for use in mechanistic and perpetual pavement design procedures.
PROPOSED ACTIVITIES:
Determine what information is currently available on mechanistic pavement design. Test and recommend appropriate back calculation software. Determine what information ODOT currently has that can be used in developing material property inputs for mechanistic and perpetual pavement design procedures. Make a recommendation on the use of available climatic data resources.
This research will also determine what additional material properties or inputs are required for implementation of the AASHTO mechanistic design procedure or other perpetual pavement design procedures and recommend future research.
MECHANISTIC PAVEMENT DESIGN INPUT PARAMETERS WORK PLAN
Quarterly Reports:
FY 06
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FY 07
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FY 08
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FY 09
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FY 10
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FY 11
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| SPR 654 |
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Waterway Enhancement Construction Methods
| Project Coordinator |
Matthew Mabey |
| Research Agency: |
Oregon State University |
| Principal Investigator: |
David N. Sillars |
| Start Date for ODOT: |
July 1, 2007 |
| Completion Date for ODOT: |
April 10, 2009 |
BACKGROUND:
ODOT has installed cathodic protection (CP) systems on eight reinforced concrete bridges along the Oregon Coast. Most of the CP zones rely on a consumable zinc anode to provide protective current to the underlying steel reinforcement. As the anode ages, chemical reactions near the interface between the zinc and concrete consume the anode resulting in an accumulation of reaction products. Initially, the bond between the anode and the concrete strengthens, but after five years of service the bond between the anode and the concrete continuously weakens with age. Also, the circuit resistance increases with age reducing the efficiency of the CP system. Previous laboratory work suggests that zinc anodes in impressed current CP systems will have a life of approximately 25 years. Current research in progress is expected to develop a condition rating for zinc anodes based on a combination of electrochemical age, circuit resistance, and bond strength. However, a practical method of determining localized anode condition is needed in order to determine the extent of deterioration and to prepare repair and maintenance strategies. Ideally, a method for condition assessment would be non-destructive or minimally destructive and could be carried out quickly in the field with minimal skill required.
OBJECTIVES:
The objective of this project is to develop a practical, minimally destructive field procedure to determine the local anode condition of cathodic protection systems.
PROPOSED ACTIVITIES:
A broad review of physical principles (and corresponding technologies) will be conducted that might be suitable as the basis for a device to assess the condition of zinc anodes in impressed current CP systems. Up to three technologies will be selected for further consideration based on applicability in the field, non-destructiveness or minimal destructiveness of the test, ease of use, cost, time required for development, and likelihood for success. Proof-of-concept testing will be conducted in a laboratory environment for the most promising technologies. Based on the laboratory results, a prototype device that meets the selection criteria will be developed and tested in the field.
WATERWAY ENHANCEMENT CONSTRUCTION METHODS WORK PLAN
Quarterly Reports:
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| SPR 658 |
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Institutional Barriers Delaying Incident Clearance
| Project Coordinator |
June Ross |
| Research Agency: |
Oregon State University |
| Principal Investigator: |
Karen Dixon |
| Start Date for ODOT: |
October, 2007 |
| Completion Date for ODOT: |
July, 2008 |
BACKGROUND:
The Oregon Department of Transportation (ODOT) has a comprehensive incident management program in place. Due to cooperative efforts among ODOT, Oregon State Police, local police, and emergency providers most incidents are cleared rapidly and traffic operations resume normally. However, a major traffic-related incident can take considerable time to clear; closure of a major highway during peak travel periods can cause major problems. It is not known to what extent institutional constraints may account for some inefficiency in incident clearance. These inefficiencies may result in extended time elapsing from incident detection through final site clearance.
OBJECTIVES:
The research proposed in this study will address several key objectives. These are summarized as follows:
· Using a variety of data resources, examine recent traffic incidents where full highway closure occurred to determine the extent to which the incident and associated traffic obstructions impact traffic operations;
· Identify institutional barriers that may affect the rapid clearance of incidents occurring on Oregon highways; and
· Identify administrative procedures that could be implemented to expedite incident clearance and estimate the benefit of these recommended procedures.
3.1 Benefits
Benefits of improved incident management are far-reaching. In addition to the potential for reducing the non-recurrent delay that often follows an incident, other benefits include reduced fuel consumption and vehicle emissions, fewer secondary crashes that result directly from the congested environment, improved travel reliability, and less direct impact on the stress or aggression levels of drivers. For the region, quick clearance times would benefit freight delivery, and minimize the impact on adjacent land use and the economy. An additional benefit of this project would be improved understanding by participating organizations regarding incident response and clearance procedures by various responding agencies.
IMPLEMENTATION:
Through the diverse structure of the TAC membership, the research results will be distributed to the various responding agencies in a truncated summary format suitable for use by multiple agencies. The results of this research may potentially modify the way that responding agencies in Oregon react to an incident, change the procedure for incident clearance, and result in a safer incident site for responders, injured parties, and the general traveling public. It is also possible that additional equipment investments may be identified such as adding supplemental message signs, providing additional incident response trucks, and improving information delivery to the traveling public and freight carriers.
The research results will be incorporated, as appropriate, in the Oregon Traffic Incident Management Strategic Plan currently being developed under the leadership of ODOT’s Maintenance Leadership Team.
INSTITUTIONAL BARRIERS DELAYING INCIDENT CLEARANCE WORK PLAN
Quarterly Reports:
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| SPR 661 |
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Flexural Steel Anchorage Performance at Diagonal Crack Locations
Project Coordinator:
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Steve Soltesz
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Research Agency:
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Oregon State University
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Principal Investigator:
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Christopher Higgins
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Start Date for ODOT:
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December 2007
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End Date for ODOT:
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June 2010
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BACKGROUND:
Many of Oregon's reinforced concrete (RC) bridges built in the 1950's were designed to permit higher shear stress in the concrete than is permitted by current AASHTO standards. In addition, modern truck loads are significantly larger than service loads of the past. A large number of reinforced concrete bridges in the ODOT inventory have exhibited significant web-shear and flexure-shear cracks. A research project recently completed at OSU developed a reliability-based method to predict the remaining capacity and life of 1950's vintage conventionally reinforced concrete bridges with diagonal-tension cracks. The proposed method also requires a tensile capacity check of the longitudinal reinforcement on the flexural tension side per AASHTO LRFD 5.8.3.5. Application of LRFD 5.8.3.5 to several bridges indicates that many girders will be limited by the tensile capacity check.
OBJECTIVES:
The main objectives of the proposed research are:
- Assess longitudinal rebar anchorages in the presence of diagonal cracks for RC bridge girders
- Compare current capacity prediction methods with experimental results
- Based on laboratory test results, develop improved methods and recommendations for rating of longitudinal rebar anchorages in diagonally cracked bridge girders
1.1 Benefits
Ratings of 1950’s vintage RCDG bridge girders are often limited by the longitudinal steel anchorage check in the AASHTO specification. If the actual diagonal-crack angle may be used or improved analysis methods are available, the bridge rating may be increased, thereby permitting higher loads, fewer bridge replacements, or reducing the need for repairs. Alternatively, the AASHTO LRFD/LRFR specifications may require recalibration to ameliorate the current provision for evaluation of existing bridges.
IMPLEMENTATION:
Meetings and workshops will be held with ODOT personnel to present research findings in-progress as well as summary findings. Background information and findings will be described in reports, papers, and peer-reviewed journals. Explicit examples will be provided for the analytical methods developed to predict the capacity of longitudinal bar anchorages in the presence of diagonal cracks.
FLEXURAL STEEL ANCHORAGE PERFORMANCE AT DIAGONAL CRACK LOCATIONS WORK PLAN
Quarterly Reports
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