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Articles 451 - 480 of 998
Full-Text Articles in Transportation Engineering
Evaluation Of Coordinated Ramp Metering (Crm) Implemented By Caltrans, Amir Molan, Nivedha Murugesan, Alireza Shams, Cristina Tortora, Faridur Rahman, Jacky Loh, Anurag Pande
Evaluation Of Coordinated Ramp Metering (Crm) Implemented By Caltrans, Amir Molan, Nivedha Murugesan, Alireza Shams, Cristina Tortora, Faridur Rahman, Jacky Loh, Anurag Pande
Mineta Transportation Institute
Coordinated ramp metering (CRM) is a critical component of smart freeway corridors that rely on real-time traffic data from ramps and freeway mainline to improve decision-making by the motorists and Traffic Management Center (TMC) personnel. CRM uses an algorithm that considers real-time traffic volumes on freeway mainline and ramps and then adjusts the metering rates on the ramps accordingly for optimal flow along the entire corridor. Improving capacity through smart corridors is less costly and easier to deploy than freeway widening due to high costs associated with right-of-way acquisition and construction. Nevertheless, conversion to smart corridors still represents a sizable …
A Rule Based Control Algorithm For On-Ramp Merge With Connected And Automated Vehicles, Ehsan Beheshtitabar
A Rule Based Control Algorithm For On-Ramp Merge With Connected And Automated Vehicles, Ehsan Beheshtitabar
Civil & Environmental Engineering Theses & Dissertations
One of the designs for future highways with the flow of Connected Automated Vehicles (CAVs) cars will be a dedicated lane for the CAVs to form platoons and travel with higher speeds and lower headways. The connectivity will enable the formation of platoons of CAVs traveling beside non-platoon lanes. The advent of connectivity between vehicles and the infrastructure will enable advanced control strategies ̶ improving the performance of the traffic ̶ to be incorporated in the traffic system. The merge area in a multilane highway with CAVs is one of the sections which can be enhanced by the operation of …
Correction To: Recommendations Of Rilem Tc 260-Rsc For Using Superabsorbent Polymers (Sap) For Improving Freeze–Thaw Resistance Of Cement-Based Materials (Materials And Structures, (2019), 52, 4, (75), 10.1617/S11527-019-1375-4), Viktor Mechtcherine, Christof Schröfl, Michaela Reichardt, Agnieszka J. Klemm, Kamal Khayat
Correction To: Recommendations Of Rilem Tc 260-Rsc For Using Superabsorbent Polymers (Sap) For Improving Freeze–Thaw Resistance Of Cement-Based Materials (Materials And Structures, (2019), 52, 4, (75), 10.1617/S11527-019-1375-4), Viktor Mechtcherine, Christof Schröfl, Michaela Reichardt, Agnieszka J. Klemm, Kamal Khayat
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Agnieszka J. Klemm is affiliated to Glasgow Caledonian University, Glasgow, UK.
The Future State Of Mobility, Jerome Quandt
The Future State Of Mobility, Jerome Quandt
Purdue Road School
Formed in 2018, the Illinois Autonomous Vehicles Association (ILAVA) is a privately funded non-for-profit organization focused on establishing thought leadership in the state of Illinois, by identifying and addressing the current and emerging opportunities related to the inevitable growth of CAV technologies throughout the transportation network. Through the deployment of scalable and sustainable business solutions, facilitating industry education and establishing thought leadership, ILAVA is creating an ecosystem that defines Illinois as #TheFutureStateofMobility.
Strategies And How-Tos On Interstate Closures For Mot, Jim Poturalski, Eryn Fletcher
Strategies And How-Tos On Interstate Closures For Mot, Jim Poturalski, Eryn Fletcher
Purdue Road School
Full interstate closures have proven to be an effective method for balancing congestion and safety when maintaining interstate infrastructure. This presentation will describe successful practices, federal requirements, and the process to follow when closing an interstate for maintenance.
Uas Based Methodology For Measuring Glide Slope Angles Of Airport Precision Approach Path Indicators (Papi), Yi-Chun Lin, Seyyed Meghdad Hasheminasab, John L. Bullock, Deborah Horton, Adam Baxmayer, Ayman Habib, Darcy M. Bullock
Uas Based Methodology For Measuring Glide Slope Angles Of Airport Precision Approach Path Indicators (Papi), Yi-Chun Lin, Seyyed Meghdad Hasheminasab, John L. Bullock, Deborah Horton, Adam Baxmayer, Ayman Habib, Darcy M. Bullock
Purdue Road School
This session presents alternative approaches for using unmanned aerial systems for checking the alignment of precision approach path indicators (PAPI lights). UAS data acquired at the KLAF (Purdue) airport will be used as an illustrative example.
Regulating 5g Installations, Bradley Pease
Regulating 5g Installations, Bradley Pease
Purdue Road School
In this session we will discuss regulation of the deployment of 5G small-cell equipment within local right-of-way.
Advancing Asset Management At Indot, Louis Feagans
Advancing Asset Management At Indot, Louis Feagans
Purdue Road School
As INDOT continues to develop Asset Management, the use of GIS and the mapping of assets become more critical. In this session INDOT will show the advancement in GIS Asset Management that has occurred in the last few years and where we are headed in the future.
Relinquishment And Reconstruction Of Sr 44—Franklin, Indiana, Trent Newport, Mark Richards
Relinquishment And Reconstruction Of Sr 44—Franklin, Indiana, Trent Newport, Mark Richards
Purdue Road School
This project involved the downtown section of SR 44, which was relinquished by INDOT to the City of Franklin. Reconstruction was funded through a relinquishment agreement, feder-al-aid funding applications, and local monies. It was a total reconstruction project of over $13 million, built in nine phases over a 4-year span. The project passes through the heart of downtown historic and business districts. This presentation will review all of the coordination and challenges of the project.
A Railroad Runs Through It - Bass Road/Hadley Road Roundabout, Mike Maurovich, Craig Shroyer
A Railroad Runs Through It - Bass Road/Hadley Road Roundabout, Mike Maurovich, Craig Shroyer
Purdue Road School
It’s not often you find a railroad intersecting a roundabout, which makes the Bass-Hadley Roundabout in the City of Fort Wayne a unique intersection with a story you have to hear! We will discuss the design and challenges of the design process; the incorpo-ration of a pedestrian trail; the construction process and its challenges; and now that the intersection is open and operating, a status of how well it is functioning.
Pitfalls Of Interchange Designs: Observations Relating To Idm Chapter 48, Joiner Lagpacan, Mark D. Orton
Pitfalls Of Interchange Designs: Observations Relating To Idm Chapter 48, Joiner Lagpacan, Mark D. Orton
Purdue Road School
This session covers common challenges found on freeway interchange designs here in Indiana. We will go over in detail common pitfalls observed from performing multiple design reviews and problems with designs that do not conform to the still-new Indiana Design Manual (IDM) Chapter 48, “Interchanges.” We will also offer conventional design solutions and alternatives to address these issues and challenges.
Recent Changes To Indot Sign Specs, Lalit M. Garg
Recent Changes To Indot Sign Specs, Lalit M. Garg
Purdue Road School
This presentation highlights recent changes to INDOT's standard specifications and standard drawings regarding traffic signs and structures.
Innovation: Field-Driven Ideas For Improvement, Todd A. May
Innovation: Field-Driven Ideas For Improvement, Todd A. May
Purdue Road School
INDOT has set up its new Department of Innovation. The goal of the Department is to collect, vet, implement, and recognize ideas, processes, and tools specifically generated by the workforce in the field, such as construction, maintenance, contracting, and inspection. Through a peer review vetting process, ideas will be worked through a systems theory/engineer-ing process for ultimate statewide implementa-tion. Join us for a discussion
2d Hydraulic Modeling For Streambank Stabilization In The White River, Nabil Ghalayini
2d Hydraulic Modeling For Streambank Stabilization In The White River, Nabil Ghalayini
Purdue Road School
As part of the new I-69 design in Morgan County, INDOT retained WSP USA to provide streambank stabilization design services for the White River. This presentation will discuss how 1D and 2D hydraulic modeling helped refine the design and include visuals to demonstrate how 1D and 2D models can help establish flow di-rection velocities at riverbanks and around pro-posed structures. A comparison of results from 1D and 2D model results will also be presented
Michigan's Inventory-Based Rating System For Unpaved Roads, Peter Torola
Michigan's Inventory-Based Rating System For Unpaved Roads, Peter Torola
Purdue Road School
The current rating systems for unpaved roads lack stability and reliability and, therefore, provide little benefit as project- or network-level metrics. Since many of these systems are derived from paved-road assessment systems, they focus heavily on surface distresses rather than road width, drainage, and other features. This session presents the Inventory-Based Rating System as a stable and implementable method of condition assessment for unpaved roads, without the focus on surface distresses.
22nd Street Reconstruction, City Of Elwood, Indiana, Haseeb Ghumman, William Savage, Darren Paarkes
22nd Street Reconstruction, City Of Elwood, Indiana, Haseeb Ghumman, William Savage, Darren Paarkes
Purdue Road School
This project involved full-depth reconstruction of 22nd Street, from P Street to Main Street, for an approximate distance of 1 mile and entailed a two-lane roadway with curb and gutter, new sidewalks, a storm system, and water and sanitary line relocations. In addition to federal funds, due to Red Gold’s investment commit-ments in the area and subsequent potential economic development, the project was awarded up to $1.4M in an Indiana Economic Development Corporation (IEDC) grant. Join us for a discussion.
Contextual Adjustment Of The Ite Trip Generation Rates Using Wi-Fi And Bluetooth Technologies, Saba Doulabi
Contextual Adjustment Of The Ite Trip Generation Rates Using Wi-Fi And Bluetooth Technologies, Saba Doulabi
LSU Master's Theses
The ITE Trip Generation Handbook has been in common use for about half a century to estimate vehicle trips generated by more than 172 land use categories as a function of establishment size (floor area) only. However, observed trip rates display a huge error range across different sites. Although contextual adjustment factors can ameliorate the error in the ITE trip generation estimates considerably, local site-specific trip generation rates should be collected for this purpose. Due to the huge time and monetary costs of data collection, adjusting the ITE trip generation rate is ignored by many jurisdictions. The primary contribution of …
A Novel Self-Healing System: Towards A Sustainable Porous Asphalt, Shi Xu, Xueyan Liu, Amir Tabakovic, Erik Schlangen
A Novel Self-Healing System: Towards A Sustainable Porous Asphalt, Shi Xu, Xueyan Liu, Amir Tabakovic, Erik Schlangen
Articles
Self-healing asphalt, aimed to produce a sustainable asphalt pavement using green technology, has been studied in the past two decades. Technologies including encapsulated rejuvenator and induction heating have been proposed, demonstrated in the laboratory, and gradually evaluated in field application. This paper looks into the synergy effect of the above two technologies, where induction heating serves as the asphalt damage repair mechanism, requiring just 2 min heating time and encapsulated rejuvenator will replenish (rejuvenate) aged asphalt binder and reinstate bitumen’s healing ability. Moreover, the increased temperature from induction heating could in turn accelerate the diffusion process of rejuvenator into aged …
Over Height Impact Avoidance And Incident Detection System, Suvash Chapain, Aly Mousaad Aly
Over Height Impact Avoidance And Incident Detection System, Suvash Chapain, Aly Mousaad Aly
Faculty Publications
During the construction and repair of bridges, work platforms or construction-related containment may result in restricted vertical clearances at a work location. Some tractor-trailer combinations are prone to over-height collisions at these locations. Collisions are a hazard to all drivers, and repair of the damage typically causes traffic delays. Appropriate solutions to this problem will focus on the prevention of collisions by detecting over-height vehicles and directing the drivers to take an alternate safe route. This presentation addresses the design and functionality of smart detection/alert systems that can be set up well in advance of a known vertical clearance restriction …
Finding Patterns In Subsurface Using Bayesian Machine Learning Approach, Wang Hui
Finding Patterns In Subsurface Using Bayesian Machine Learning Approach, Wang Hui
Civil and Environmental Engineering and Engineering Mechanics Faculty Publications
Stochastic simulation approaches and uncertainty quantification are usually adopted for gaining insight into variability in soil stratigraphy configurations. Previous investigations at geotechnical site characterization and interpretation can be broadly categorized into geostatistics- and process-based methods. On the other hand, modern site exploration techniques provide high-quality, dense datasets in physical spaces with high resolution, either directly from sensors (for example, cone penetration testing data) or indirectly from geophysical inversion (such as seismic inversion, electromagnetic induction inversion, and ground penetrating radar). In this work, anisotropy and heterogeneity are considered as possible patterns that inherently exist in the observations, and these are inferred …
Developing A Computer Vision-Based Decision Support System For Intersection Safety Monitoring And Assessment Of Vulnerable Road Users, Arash Jahangiri, Anagha Katthe, Aryan Sohrabi, Xiaobai Liu, Shashank Pulagam, Vahid Balali, Sahar Ghanipoor Machiani
Developing A Computer Vision-Based Decision Support System For Intersection Safety Monitoring And Assessment Of Vulnerable Road Users, Arash Jahangiri, Anagha Katthe, Aryan Sohrabi, Xiaobai Liu, Shashank Pulagam, Vahid Balali, Sahar Ghanipoor Machiani
Mineta Transportation Institute
Vision-based trajectory analysis of road users enables identification of near-crash situations and proactive safety monitoring. The two most widely used sur-rogate safety measures (SSMs), time-to-collision (TTC) and post-encroachment time (PET)—and a recent variant form of TTC, relative time-to-collision (RTTC)—were investigated using real-world video data collected at ten signalized intersections in the city of San Diego, California. The performance of these SSMs was compared for the purpose of evaluating pedestrian and bicyclist safety. Prediction of potential trajectory intersection points was performed to calculate TTC for every interacting object, and the average of TTC for every two objects in critical situations was …
Analysis Of Crashes Involving First Responder Vehicles, Josie Gray
Analysis Of Crashes Involving First Responder Vehicles, Josie Gray
Doctoral Dissertations and Master's Theses
First responders face many hazards that put their lives at risk while on duty. A review of the National Law Enforcement Officers Memorial Fund statistics shows that 553 police officers died in the line-of-duty between 2008 and 2017 as a direct result of a traffic related incidents. Sadly, the nation’s first responders are exposed to factors which make them uniquely vulnerable to traffic related injuries and deaths. The goal of this research is to investigate and analyze crashes involving first responder vehicles and struck-by crashes. This project concludes that approximately 1.2% of the crashes in the state of Florida involve …
The Potential For Autonomous Vehicle Technologies To Address Barriers To Driving For Individuals With Autism, Caroline Rodier
The Potential For Autonomous Vehicle Technologies To Address Barriers To Driving For Individuals With Autism, Caroline Rodier
Mineta Transportation Institute
Individuals with autism represent a sizeable share of the U.S. population (almost 2%), and nearly half of those with autism have average to high levels of intelligence. However, available research shows that adults with autism have a much more difficult time becoming employed and living independently compared to both typically developing adults and adults with disabilities. This study reviews the available literature on the magnitude of challenges to driving and accessing essential opportunities for adults with autism, and the potential of autonomous vehicles to address those challenges. This study is unique in that it identifies the specific driving challenges and …
Optfill: A Tool For Infeasible Cycle-Free Gapfilling Of Stoichiometric Metabolic Models, Wheaton L. Schroeder, Rajib Saha
Optfill: A Tool For Infeasible Cycle-Free Gapfilling Of Stoichiometric Metabolic Models, Wheaton L. Schroeder, Rajib Saha
Mid-America Transportation Center: Final Reports and Technical Briefs
Stoichiometric metabolic modeling, particularly genome-scale models (GSMs), is now an indispens- able tool for systems biology. The model reconstruction process typically involves collecting informa- tion from public databases; however, incomplete systems knowledge leaves gaps in any reconstruc- tion. Current tools for addressing gaps use databases of biochemical functionalities to address gaps on a per-metabolite basis and can provide multiple solutions but cannot avoid thermodynami- cally infeasible cycles (TICs), invariably requiring lengthy manual curation. To address these limita- tions, this work introduces an optimization-based multi-step method named OptFill, which performs TIC-avoiding whole-model gapfilling. We applied OptFill to three fictional prokaryotic models …
Calibrating The Highway Capacity Manual Arterial Travel Time Reliability Model, Ernest Tufuor, Laurence Rilett, Li Zhao
Calibrating The Highway Capacity Manual Arterial Travel Time Reliability Model, Ernest Tufuor, Laurence Rilett, Li Zhao
Mid-America Transportation Center: Final Reports and Technical Briefs
The latest edition of the Highway Capacity Manual (HCM-6) includes, for the first time, a methodology for estimating and predicting the average travel time distribution (TTD) of urban streets. Travel time reliability (TTR) metrics can then be estimated from the TTD. The HCM-6 explicitly considers five key sources of travel time variability. A literature search showed no evidence that the HCM-6 TTR model has ever been calibrated with empirical travel time data. More importantly, previous research showed that the HCM-6 underestimated the empirical TTD variability by 70% on a testbed in Lincoln, Nebraska. In other words, the HCM-6 TTR metrics …
Analysis Of Component Errors In The Highway Capacity Manual Travel Time Reliability Estimations For Urban Streets, Ernest Tufuor, Laurence Rilett
Analysis Of Component Errors In The Highway Capacity Manual Travel Time Reliability Estimations For Urban Streets, Ernest Tufuor, Laurence Rilett
Mid-America Transportation Center: Final Reports and Technical Briefs
The Highway Capacity Manual 6th edition (HCM6) includes a new methodology to estimate and predict the distribution of average travel times (TTD) for urban streets. The TTD can then be used to estimate travel time reliability (TTR) metrics. Previous research on a 0.5-mi testbed showed statistically significant differences between the HCM6 estimated TTD and the corresponding empirical TTD. The difference in average travel time was 4 s that, while statistically significant, is not important from a practical perspective. More importantly, the TTD variance was underestimated by 70%. In other words, the HCM6 results reflected a more reliable testbed than field …
Análisis Por Confiabilidad Del Modelo De Diseño Aashto 93 Para Pavimentos Flexibles En El Valle De Aburrá, Mario Santiago Hernández, Juan Pablo Osorio, Juan Camilo Viviescas
Análisis Por Confiabilidad Del Modelo De Diseño Aashto 93 Para Pavimentos Flexibles En El Valle De Aburrá, Mario Santiago Hernández, Juan Pablo Osorio, Juan Camilo Viviescas
Books/Book Chapters
La necesidad de construir pavimentos con mejores especificaciones técnicas y mayores períodos de servicio requiere de una modelación rigurosa de la variabilidad en las propiedades geotécnicas con el fin de garantizar la confiabilidad de estas estructuras. Por lo tanto, se realizó un análisis basado en la confiabilidad del método Aashto-93, considerando la variabilidad geotécnica del suelo, asociada al módulo resiliente de la subrasante. Los diseños por confiabilidad fueron efectuados de acuerdo con las categorías, parámetros y estructuras establecidas por el Manual de diseño de pavimentos asfálticos en vías con medios y altos volúmenes de tránsito, de 1998, del Instituto Nacional …
An Integrated Computational And Experimental Study To Investigate Staphylococcus Aureus Metabolism, Mohammad Mazharul Islam, Vinai C. Thomas, Matthew Van Beek, Jong-Sam Ahn, Abdulelah A. Alqarzaee, Chunyi Zhou, Paul D. Fey, Kenneth W. Bayles, Rajib Saha
An Integrated Computational And Experimental Study To Investigate Staphylococcus Aureus Metabolism, Mohammad Mazharul Islam, Vinai C. Thomas, Matthew Van Beek, Jong-Sam Ahn, Abdulelah A. Alqarzaee, Chunyi Zhou, Paul D. Fey, Kenneth W. Bayles, Rajib Saha
Mid-America Transportation Center: Final Reports and Technical Briefs
Staphylococcus aureus is a metabolically versatile pathogen that colonizes nearly all organs of the human body. A detailed and comprehensive knowledge of staphylococcal metabolism is essential to understand its pathogenesis. To this end, we have reconstructed and experimentally validated an updated and enhanced genome-scale metabolic model of S. aureus USA300_FPR3757. The model combined genome annotation data, reaction stoichiometry, and regulation information from biochemical databases and previous strain-specific models. Reactions in the model were checked and fixed to ensure chemical balance and thermodynamic consistency. To further refine the model, growth assessment of 1920 nonessential mutants from the Nebraska Transposon Mutant Library …
Safety Evaluation Of Innovative Intersection Designs: Diverging Diamond Interchanges And Displaced Left-Turn Intersections, Ahmed Abdelrahman
Safety Evaluation Of Innovative Intersection Designs: Diverging Diamond Interchanges And Displaced Left-Turn Intersections, Ahmed Abdelrahman
Electronic Theses and Dissertations, 2020-2023
Diverging diamond interchanges (DDIs) and Displaced left-turn intersections (DLTs) are designed to enhance the operational performance of conventional intersections that are congested due to heavy left-turn traffic volumes. Since drivers are not familiar with these types of intersections, there is a need to evaluate their safety performance to validate their effect, and to estimate reliable and representative Crash Modification Factors (CMFs). The safety evaluation was conducted based on three common safety assessment methods, which are before-and-after study with comparison group, Empirical Bayes before-and-after method, and cross-sectional analysis. Furthermore, since DLTs showed poor safety performance, the study also investigated the operational …
Smartphone Sensor-Based Pedestrian Activity Recognition For P2v Communication And Warning System, Dhrubo Hasan Chowdhury
Smartphone Sensor-Based Pedestrian Activity Recognition For P2v Communication And Warning System, Dhrubo Hasan Chowdhury
Electronic Theses and Dissertations, 2020-2023
The ubiquity of smartphones has made a remarkable influence on everyone's day to day life. Variety of useful built-in sensors provide smartphones with a convenient floor for data collection and analysis. Application development based on the user's location and movement is not a difficult task nowadays. But injuries and deaths due to smartphone-distracted movement on roadways is on the increase. This study explores the capabilities of smartphone inertial sensors for pedestrian activity recognition. Smartphone distracted movements can be predicted from the associated pedestrian's posture, thus inertial sensors can provide effective solution for this specific task. Volunteers were asked to perform …