Digital Commons Network^™

Probability Of Detection Study For Visual Inspection Of Steel Bridges: Volume 1—Executive Summary, Leslie E. Campbell, Luke R. Snyder, Julie M. Whitehead, Robert J. Connor, Jason B. Lloyd

JTRP Technical Reports

An inspector’s ability to correctly identify surface and internal defects in steel bridge components is critical to protecting public safety. Ensuring that inspectors are properly trained and adequately equipped to detect these defects in locations that are difficult to access and/or in unfavorable environmental conditions must be a high priority. While the Federal Highway Administration and individual state departments of transportation have guidelines for inspector qualifications, trainings, and certifications, there is very little emphasis placed on evaluating or “testing” a given inspector’s capability to characterize detect defects in the field. As a result, there is also very little if any …

Connected Vehicle Corridor Deployment And Performance Measures For Assessment, Howell Li, Jijo K. Mathew, Woosung Kim, Enrique Daniel Saldivar-Carranza, Jim Sturdevant, W. Benjamin Smith, Darcy M. Bullock

JTRP Technical Reports

In November 2016, the American Association of State Highway and Transportation Officials (AASHTO) announced the Signal Phase and Timing (SPaT) challenge to state and local agencies to kick start infrastructure deployments for V2I communications. The challenge involved the deployment of Dedicated Short Range Communication (DSRC) infrastructure with SPaT broadcasts (current intersection signal light phase) on at least 20 signalized intersections in all of the 50 states by 2020. Although the roadmap for agencies to partner with the automotive industry is still evolving, it is important for Indiana to not only support the SPaT challenge, but also identify mutually beneficial opportunities …

Strength Assessment Of Older Continuous Slab And T-Beam Reinforced Concrete Bridges, Seungwook Seok, Faezeh Ravazdezh, Ghadir Haikal, Julio A. Ramirez

JTRP Technical Reports

This report investigates a new methodology for load rating of older reinforced concrete flat-slab and T-beam bridges in Indiana, using the tools of 3D finite element analysis. The Conventional Load Rating (CLR) method currently in use by INDOT relies on a simplified 2D analysis based on beam theory that may underestimate bridge capacity. Since the actual behavior of a bridge structure is 3D in nature, a 3D computational model is better suited to estimate bridge response for load rating. 3D finite elements models are capable of reflecting actual bridge dimensions, cross sections, and connection configurations. More importantly, with three-dimensional models, …

Developing The Collision Diagram Builder: Phase Ii Corridor Edition, Andrew P. Tarko, Jose Thomaz, Mario Romero

JTRP Technical Reports

The Collision Diagram Builder–Corridor Edition (Corridor CDB) is a tool developed by the Center for Road Safety at the request of the Indiana Department of Transportation. The primary objective of the tool is to expand the existing Collision Diagram Builder to make it useful for analyzing spatial patterns of various types of crashes at multiple intersections and on segments in corridors and networks of a considerable size. The Corridor CDB displays crashes at major intersections, and between these intersections, on roads divided by the user into short segments that allow analysis of crash grouping between intersections.

The new CDB is …

Cost-Effectiveness Of Converting Signalized Arterials To Free-Flow Facilities, Yu Qiao, Nathaniel Shellhamer, Samuel Labi, Jon D. Fricker, Kumares C. Sinha

JTRP Technical Reports

Traffic signals on four-lane divided signalized arterials impair mobility and exacerbate traffic congestion, driver frustration, crash risk, and overall user and community costs. This study examined the economic feasibility of converting this roadway type to freeflow corridors. A free-flowing facility does not refer to a freeway, but rather, a facility that is free of traffic control devices (such as traffic signals and stop signs) on the mainline. At the intersection level, four intersection alternatives were considered: signalized intersection (do nothing), two-way stop-controlled (TWSC) intersection, J-turn and interchange. The study developed a decision framework that evaluates the overall performance of upgrade …

Synthesis Study: Facilities (Enterprise Development, Sponsorship/Privatization), Ananth V. Iyer, Olga Senicheva, Steven R. Dunlop, Dutt J. Thakkar, Andrew Colbert, Hannah Pratt

JTRP Technical Reports

The Indiana Department of Transportation maintains 17 rest area locations with 28 separate rest area facilities located on interstates for driver safety and convenience. Although the rest areas provide many benefits to the traveling public, the rest areas do not earn direct profits. Moreover, the Indiana Department of Transportation is increasingly challenged by inadequate funding from taxes generated on the interstates. Constrained by Title 23, that prohibits the commercialization and the privatization of the rest areas, the state of Indiana has a high interest in sustainable sources of revenue at the rest areas that would be able to promote the …

Back Of Queue Warning And Critical Information Delivery To Motorists, Lingxi Li, Yaobin Chen, Renran Tian, Feng Li

JTRP Technical Reports

Back-of-queue crashes are one of the main sources for fatal accidents on U.S. highways. A variety of factors including low visibility, slippery road surface, and driver distraction/drowsiness during highway cruising, all contribute to this type of fatal crashes. Thus, it is very important to improve the driver’s situational awareness before they approach traffic queues on highways.

In this project, we develop a prototype in-vehicle back-of-queue alerting system that is based on the probe vehicle data from INDOT. Speed changes among different road segments are used to identify slow traffic queues, which are compared with vehicle locations and moving directions to …

Life-Cycle Cost Analysis For Short- And Medium-Span Bridges, Stefan L. Leiva Maldonado, Mark D. Bowman

JTRP Technical Reports

Life-cycle cost analysis (LCCA) has been defined as a method to assess the total cost of a project. It is a simple tool to use when a single project has different alternatives that fulfill the original requirements. Different alternatives could differ in initial investment, operational and maintenance costs among other long term costs. The cost involved in building a bridge depends upon many different factors. However, long-term cost need to be considered to estimate the overall cost of the project and determine its LCC. Without watchful consideration of the long-term costs and full life-cycle costing, current investment decisions that look …

Developing A Business Ecosystem Around Autonomous Vehicle Infrastructure In Indiana, Ananth V. Iyer, Steven R. Dunlop, Anmol Guram Singh, Mihir Bhatia, Sazzadur Rahman

JTRP Technical Reports

INDOT will soon be embarking on infrastructure planning to accommodate autonomous vehicles. This new technology affords the ability to impact economic value creation across the supply chain in Indiana, as well as foster economic development in Indiana to support these emerging technologies. This proposal will be a first cut towards exploring the development of a strategy to realize this potential. Our proposal will consist of two phases.

Phase 1: A focus on industry choices and plans that can inform INDOT choices.

Phase 2: A focus on INDOT’s internal decision making, risk tolerance, and choices regarding infrastructure projects.

Strategic And Tactical Guidance For The Connected And Autonomous Vehicle Future, Satish Ukkusuri, Fasil Sagir, Nishtha Mahajan, Benjamin Bowman, Salil Sharma

JTRP Technical Reports

Autonomous vehicle (AV) and Connected vehicle (CV) technologies are rapidly maturing and the timeline for their wider deployment is currently uncertain. These technologies are expected to have a number of significant societal benefits: traffic safety, improved mobility, improved road efficiency, reduced cost of congestion, reduced energy use, and reduced fuel emissions. State and local transportation agencies need to understand what this means for them and what they need to do now and in the next few years to prepare for the AV/CV future. In this context, the objectives of this research are as follows:

1. Synthesize the existing state of practice …

Indot Research Program Benefit Cost Analysis—Return On Investment For Projects Completed In Fy 2018, Bob Mccullouch

JTRP Technical Reports

This project produced a financial analysis of INDOT’s research projects completed in 2018, as requested annually by the Governor’s office. This analysis uses the approach of calculating net present values created by the implementation of research project to determine benefit cost ratios and return on the research investment. The return on investment (ROI) is limited to projects where benefits and costs are quantifiable. Additionally, the 2018 ROI is combined with those from 2017 and 2016 to create a rolling average.

In FY 2018 twenty-two research projects were completed. Out of this number two projects produced outcomes that could be classified …

Subgrade Stabilization Alternatives, Eimar Sandoval, Andrea Ardila Quiroga, Antonio Bobet, Tommy Nantung

JTRP Technical Reports

Recent research has shown that the subgrade soil type and its engineering properties govern the performance of the pavement, especially for clayey soils. However, current application of the Pavement_ME in Indiana does not fully account for the changes of type of soil and stiffness that may arise with treatment. This research addresses this issue by exploring engineering properties, namely fines content, plasticity index, unconfined compression strength and resilient modulus of subgrade stabilization alternatives. The effects of changes in moisture content and temperature on the stiffness of treated subgrades are also studied. Three A-7-6 soils and one A-6 soil mixed with …

Central Hma Acceptance Lab Process Improvement Project, Ted W. Boehm, Jim Handy

JTRP Technical Reports

The Indiana Department of Transportation (INDOT) Central Hot Mix Asphalt (HMA) Acceptance Lab was opened on March 29, 2018, at the Office of Materials Management (OMM) facility in Indianapolis. The state-of-the-art lab conducts acceptance testing on HMA samples from INDOT’s Crawfordsville and Greenfield districts, as well as testing of appeals samples from the other four INDOT districts. Each HMA sample undergoes multiple sequences acceptance testing processes. INDOT’s standard metric is for these tests to be completed and reported in six days. Overall average performance in 2018 met this target (4.66 days for Crawfordsville, 4.99 days for Greenfield), however, turnaround time …

Network-Level Scheduling Of Road Projects During The Construction Season Considering Network Connectivity, Wubeshet Woldemariam, Augustine Agyemang, Mohammad Miralinaghi, Dulcy M. Abraham, Kumares Sinha

JTRP Technical Reports

INDOT implements several hundred highway projects annually. One of the unintended (and adverse) consequences of road work is the establishment of work zones or full or partial closure of certain road links and the subsequent impairment of network connectivity during the construction season. The temporary reduction in network connectivity can lead to reduced mobility and decreased accessibility to businesses. The user costs incurred during highway construction can be significant, particularly where the affected links have very high traffic volumes or offer few opportunities to detour. Delay also inflicts costs on the non-traveling public, such as when it is necessary to …

Quality Control And Quality Assurance Of Asphalt Mixtures Using Laboratory Rutting And Cracking Tests, Jusang Lee, John E. Haddock, Dario D. Batioja Alvarez, Reyhaneh Rahbar Rastegar

JTRP Technical Reports

The main objectives of this project were to review the available balanced-mix design (BMD) methodologies, understand the I-FIT and Hamburg Wheel Tracking Test (HWTT) test methods using INDOT asphalt mixtures, and to explore the application of these tests to both a BMD approach and as performance-related Quality Control (QC) and Quality Acceptance (QA) methods. Two QA mixture specimen types, plant-mixed laboratory-compacted (PMLC) and plant-mixed field-compacted (PMFC) were used in the determination of cracking and rutting parameters. Distribution functions for the flexibility index (FI) values and rutting parameters were determined for various mixture types. The effects of specimen geometry and air …

Investigating The Need For Drainage Layers In Flexible Pavements, Masoud Seyed Mohammad Ghavami, Maryam Sadat Hosseini, Pablo D. Zavattieri, John E. Haddock

JTRP Technical Reports

Moisture can significantly affect flexible pavement performance. As such, it is crucial to remove moisture as quickly as possible from the pavements, mainly to avoid allowing moisture into the pavement subgrade. In the 1990s the Indiana Department of Transportation (INDOT) adopted an asphalt pavement drainage system consisting of an open-graded asphalt drainage layer connected to edge drains and collector pipes to remove moisture from the pavement system. However, over the intervening two decades, asphalt pavement materials and designs have dramatically changed in Indiana, and the effectiveness of the pavements drainage system may have changed. Today, in-place field densities achieved during …

Experimental Study Of The Load Response Of Large Diameter Closed-Ended And Open-Ended Pipe Piles Installed In Alluvial Soil, Fei Han, Eshan Ganju, Rodrigo Salgado, Monica Prezzi, Mir Zaheer

JTRP Technical Reports

A seven-span concrete bridge was constructed over the Wabash River in Lafayette, Indiana. The bridge, which has a total length of 305 m (1,000 ft) and typical spans of 46 m (152 ft), consists of six hammerhead bridge piers in the center and two end bents supported on open-ended and closed-ended pipe piles, respectively. According to the structural bridge design, the dead load carried by each pile ranges from 1,014 kN (228 kips) to 1,495 kN (336 kips), whereas the live load ranges from 512 kN (115 kips) to 1,188 kN (267 kips), depending on the location of the piles. …

Area-Scalable High-Heat-Flux Dissipation At Low Thermal Resistance Using A Capillary-Fed Two-Layer Evaporator Wick, S. Sudhakar, J. A. Weibel, F. Zhou, E. M. Dede, S V. Garimella

CTRC Research Publications

A two-layer sintered porous evaporator wick for use in vapor chambers is shown to offer very high performance in passive high-heat-flux dissipation over large areas at a low thermal resistance. The two-layer wick has an upper cap layer dedicated to capillary liquid feeding of a thin base layer below that supports boiling. An array of vertical posts bridges these two layers for liquid feeding, while vents in the cap layer provide an unimpeded pathway for vapor removal from the base wick. The two-layer wick is fabricated using a combination of sintering and laser machining processes. The thermal resistance of the …

Bell Pepper Cultivar Evaluation, Central Kentucky, 2018, Chris Smigell, John Strang, John Snyder, Emily Pfeufer

Midwest Vegetable Trial Reports

No abstract provided.

Projected Climate Change Impacts On Indiana’S Energy Demand And Supply, Leigh Raymond, Douglas Gotham, William Mcclain, Sayanti Mukhopadhyay, Roshanak Nateghi, Paul V. Preckel, Peter Schubert, Shweta Singh, Liz Wachs

Energy Publications

This paper estimates changes in future energy demand and supply for Indiana due to projected climate change impacts. We first estimate demand changes under both the business-as-usual emissions scenario (RCP 8.5) and a scenario based on reduced emissions consistent with a 2-degree increase in global mean temperature (RCP 4.5), on both a statewide basis and for major urban areas. We then use our adjusted statewide energy demand projections as an input to a comprehensive model of Indiana’s energy system, to project expected changes in the state’s energy supply under both scenarios. Finally, we consider the potential impacts of two policy …

Academic Librarians As Informed Learning Developers, Rachel Fundator, Clarence Maybee

IMPACT Publications

Abstract from book

Implications – Drawing upon their expertise in how learners use information, academic librarians can use the findings to concentrate their consultative efforts to effectively partner with teachers to transform student learning experiences in higher education.

• partnering with teachers to develop informed learning experiences by leveraging the expertise of the teacher and the librarian;

• applying an informed learning pedagogic approach, and drawing from and sharing information literacy scholarship illuminating how information is used in the learning process;

• creating informed learning experiences that are responsive to institutional and disciplinary perspectives; and

• encouraging teachers to reflect on their intentions for …

  ---

  Go to article

Evaluation Of Heritage Beans In West Virginia, Lewis Jett, Silas Childs

Midwest Vegetable Trial Reports

No abstract provided.

Zucchini Cultivar Evaluation For Production In West-Central Indiana, 2018, Petrus Langenhoven

Purdue Fruit and Vegetable Research Reports

This is a compilation of 20 research trial reports from four land-grant universities in the Midwestern United States. Crops include cantaloupe, pickling cucumber, pepper, potato, pumpkin, summer squash and zucchini, sweet corn, tomato, and watermelon. Somecrops were evaluated in high tunnels or hoophouses. Most trials evaluated different cultivars or varieties. One report addressed plant spacing for sweet corn and one addressed soil block for production of tomato seedlings. A list of vegetable seed sources and a list of other online sources of vegetable trial reports are also included.

Midwest Vegetable Trial Report For 2018, Elizabeth Maynard, Petrus Langenhoven, Wenjing Guan, Brad R. Bergefurd

Purdue Fruit and Vegetable Research Reports

This is a compilation of 15 research trial reports from four land-grant universities in the Midwestern United States. Crops include cantaloupe, pickling cucumber, pepper, potato, pumpkin, summer squash and zucchini, sweet corn, tomato, and watermelon. Somecrops were evaluated in high tunnels or hoophouses. Most trials evaluated different cultivars or varieties. One report addressed plant spacing for sweet corn and one addressed soil block for production of tomato seedlings. A list of vegetable seed sources and a list of other online sources of vegetable trial reports are also included.

2018 Watermelon Variety Evaluation In Indiana, Wenjing Guan, Dan Egel, Dennis Nowaskie, Curtis Marchino

Purdue Fruit and Vegetable Research Reports

This is a compilation of 20 research trial reports from four land-grant universities in the Midwestern United States. Crops include cantaloupe, pickling cucumber, pepper, potato, pumpkin, summer squash and zucchini, sweet corn, tomato, and watermelon. Somecrops were evaluated in high tunnels or hoophouses. Most trials evaluated different cultivars or varieties. One report addressed plant spacing for sweet corn and one addressed soil block for production of tomato seedlings. A list of vegetable seed sources and a list of other online sources of vegetable trial reports are also included.

Data Approximation Strategies Between Generalized Line Scales And The Influence Of Labels And Spacing, Jonathan C. Kershaw, Cordelia Running

Department of Food Science Faculty Publications

Comparing sensory data gathered using different line scales is challenging. We tested whether adding internal labels to a generalized visual analog scale (gVAS) would improve comparability to a typical generalized labeled magnitude scale (gLMS). Untrained participants evaluated cheeses using one of four randomly assigned scales. Normalization to a cross‐modal standard and/or two gLMS transformations were applied to the data. Response means and distributions were lower for the gLMS than the gVAS, but no difference in resolving power was detected. The presence of labels, with or without line markings, caused categorical‐like lumping of responses. Closer low‐end label spacing for gLMS increased …

Characterizing Dysgeusia In Hemodialysis Patients, Ciara Fitzgerald, Gretchen Wiese, Ranjani N. Moorthi, Sharon M. Moe, Kathleen Hill Gallant, Cordelia Running

Department of Food Science Faculty Publications

Dysgeusia (abnormal taste) is common in those with chronic kidney disease and contributes to poor nutritional intake. Previous sensory work has shown that taste improves after dialysis sessions. The goal of this pilot study was to characterize altered taste perceptions in patients on dialysis compared with healthy adults, and to evaluate relationships between serum parameters with taste perceptions. We hypothesized that patients undergoing dialysis would experience blunted taste intensities compared with controls, and that serum levels of potential tastants would be inversely related to taste perception of compounds. Using a cross-sectional design, we carried out suprathreshold sensory assessments (flavor intensity …

The Uniform Soybean Tests: Northern Region 2019, Gary L. Nowling, Guohong Cai

Uniform Soybean Tests Northern Region

United States Department of Agriculture Agricultural Research Service, West Lafayette, Indiana, Cooperating with State Agricultural Experiment Stations, Northern States.

The Influence Of The Great Recession On The Identification Of Students From Non-White Populations In The State Of Texas, Jaret Hodges, Juliana Tay, Hyeseong Lee, Nielsen Pereira

Department of Education Studies Graduate Student Publications

The Great Recession is an economic crisis which has had repercussions through different facets of U.S. society. Texas, despite overall economic health, enacted severe cuts to education as a result of the Great Recession. A potential consequence of these austerity measures is the identification of Black, Latinx, and Native American students for gifted education services. This article examines effects of the Great Recession and educational budget policy on the identification of Black, Latinx, and Native American students for gifted services in Texas. Publicly available data were acquired from the Texas Education Agency on district demographic data from 1999 to 2015. …

Library Games - First Steps Towards Information Literacy, Céline Ervinckx, Anne-Catherine Van Overbeke, Frédéric Brodkom

Proceedings of the IATUL Conferences

No abstract provided.