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Research Results Presentations

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Research Results Presentations are a platform for researchers to provide a final presentation on a research project. An overview of the project is provided with detailed discussions on the findings and recommendations. These presentations possess strong technical components and in-depth discussions that focus primarily on the research with minimal details on administrative matters.

Results Presentations typically last for 60 minutes, including time for questions/answers. Most of the presentations are offered nationwide via a live webinar coordinated through the Ohio LTAP Center. In addition to the live broadcast, the webinars are recorded and available for viewing at a later date. Results presentations are offered at no charge to attendees. Certificates of attendance are made available upon request to those who are physically present at the presentation.

Intersection Modifications Using Modular Mini-Roundabout Methods

December 8, 2021 @ 1:00-2:00PM (ET)

Research Agency: Ohio University

Presenter: Bhaven Naik, Ph.D.

Registration URL: https://register.gotowebinar.com/register/2535175165559983631


Conversion of traditional intersections (stop controlled and signalized) to modern RABs has been a growing practice in many countries around the world including the U.S. – largely due to the benefits of reduction in crash frequency and severity, capacity improvement, and operational improvement. However, construction of traditional RABs is costly and requires additional right‐of‐way (ROW) which can deter roundabout installation on local transportation systems that have budgetary and/or available ROW restrictions. The main objective of this project was to develop guidelines for ORIL on the installation and performance of mini‐/modular‐RABs considering characteristics of Ohio’s local transportation system. Based on published guidelines and from existing pilot implementations (both international and within U.S.), current design practices considering traffic condition and roadway conditions were identified. Based on survey findings, there was a reasonably high level of familiarity with mini-RABs among respondents. Most agencies consider reduction of crashes/severity and improved traffic operations in installation of mini-RABs. Major concern with mini-RABs is drivers neglecting the central island and driving straight through thus causing the mini-/modular-RAB to lose its integrity. Agencies typically place mini-/modular-RABs on two-lane highways with low traffic volumes (<15,000 vpd); and/or peak-hour volumes of 1,600 to 1,800 vehicles. Based on driving simulator experiments, there are no differences in critical gap as driver’s maneuvered through mini-RAB of different ICDs. Operations-wise, Mini-RABs with larger ICDs performed better than those with smaller ICDs.

Assessment of Existing and Potential Volume Reduction for Post Construction Stormwater Management

December 9, 2021 @ 1:00-2:00PM (ET)

Research Agency: ms consultants, inc.

Presenter: Anil Tangirala, Justin Kerns

Registration URL: https://attendee.gotowebinar.com/register/1722064326455172624


The Ohio Environmental Protection Agency (OEPA) regulations require the implementation of stormwater Best Management Practices (BMPs) into the design of many construction projects for post-construction runoff control. Traditional stormwater quantity BMPs tend to have a large footprint which creates the need to acquire additional right‐of way area. These BMPs can also pose a safety hazard from standing water. For many construction projects, the large footprint and safety concerns of traditional stormwater quantity BMPs can limit their feasibility.

Many ODOT roadway projects have common features (e.g. grassed medians and grassed shoulders) that likely contribute to overall volume reduction—through infiltration and evapotranspiration. Runoff that infiltrates into the ground is considered "treated" per the requirements of the OEPA Construction General NPDES Permit. Modifications to the grassed medians and shoulders (such as soil amendments) may increase the infiltration capacity and evapotranspiration ability of these grassed medians and grassed shoulder areas.

This research focused on developing additional options for post construction BMPs available to ODOT projects. Real-time flow monitoring equipment was installed along ODOT roadways to measure stormwater runoff across the state of Ohio. This resulted in the largest data collection effort of its kind in the state of Ohio. Through extensive performance evaluation and cost-benefit analysis, a new BMP, the Amended Vegetated Filter Strip (AVFS), has been developed and proposed for inclusion in ODOT’s Locations and Design Manual, which provides design guidance for all ODOT construction projects.

Division of Planning Research On-Call Task #8 – Assessment and Prioritization of Culverts for Enhanced Fish Passage

December 10, 2021 @ 12:00-1:00PM (ET)

Research Agency: Ohio University

Presenter: Natalie Kruse-Daniels

Registration URL: https://attendee.gotowebinar.com/register/914464239762247182


The Ohio Department of Transportation (ODOT) is responsible for thousands of culverts that convey streams in the Lake Erie watershed. Some culverts are recognized as impediments to fish passage, acting akin to low head dams, particularly at periods of low stream flow. Culverts that experience high velocities at certain flow regimes may also serve as a barrier for certain fish species. Culverts and other similar structures that limit aquatic organism passage can lead to a reduction in fish species upstream to approximately half of those found downstream. Barriers to upstream migration can reduce the quality of the fish community and reduce the potential for improvement in fish communities due to other watershed restoration work. Conversely, culverts preventing aquatic organism passage may also be preventing upstream migration of invasive fish species from Lake Erie into tributary streams.

The goal of Task #8 was to identify the scale of culvert related aquatic organism barriers in the Lake Erie watershed, target key high-quality watershed focus areas, and identify potential project locations for culvert conversion to allow for aquatic organism passage.  The specific objectives for Task #8 were to: 1) identify high quality watersheds in the Lake Erie watershed that could benefit from improved aquatic organism passage including available fish data upstream and downstream of culverts that are acting as barriers; 2) using a geographic information systems (GIS) approach, identify culverts greater than 18” in diameter (diameter cutoff may be revised based on the data) that are likely impeding aquatic organism passage in the target watersheds; and 3) produce a technical brief to report the findings of the research including options for improved aquatic organism passage, discussion of risks, and prioritization of potential projects.

Optimizing Continuous Friction Testing on Low-Speed Roads and in Tight Curves

December 16, 2021 @ 1:00-2:00PM (ET)

Presenter:    Mike Bilbee and Mohit Mandokhot, Transportation Research Center 

Registration URL: https://register.gotowebinar.com/register/2535175165559983631


ODOT has traditionally measured available wet friction of the road surfaces with an ASTM E274 Locked-Wheel Friction Tester (LWFT) at 40 mph. The use of the LWFT at speeds other than 40 mph had been avoided due to the speed gradient that naturally occurs. The friction values measured are inversely associated with speed - as the speed increases, the friction value decreases. The effect a curve had on the results from a LWFT was also unclear.

This research focused on identifying a Continuous Friction Measuring Equipment (CFME) device that could be used on low-speed roads and tight curve scenarios to assess the possibility of measuring available wet friction in areas of the roadway network where LWFT was not previously used. This presentation will provide information on the findings from the literature review and controlled testing of the selected device.

Past Results Presentations

Results Presentations conducted in the past can be viewed by clicking the button below. The list can be sorted by project name, researcher and date. To sort the list, hold your cursor over teh column header, ten click on the down arrow to right of the column heading.

Go to Past Results Presentations