Open Access. Powered by Scholars. Published by Universities.®
Civil and Environmental Engineering Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Concrete (19)
- Inspection (14)
- Safety (14)
- Durability (13)
- Pavement (12)
-
- Bridge (11)
- Cracking (11)
- Rutting (11)
- Fatigue (9)
- Transportation planning (9)
- Shrinkage (8)
- Steel (8)
- Bridge deck (7)
- Bridges (7)
- Compaction (7)
- Environmental (7)
- Highway construction (7)
- ITS (7)
- Indiana (7)
- Quality control (7)
- Soils (7)
- Strength (7)
- Computer (6)
- GIS (6)
- GPS (6)
- Life cycle cost analysis (6)
- Maintenance (6)
- Painting (6)
- Rehabilitation (6)
- Remaining life (6)
- Publication Year
Articles 61 - 90 of 1127
Full-Text Articles in Civil and Environmental Engineering
Effectiveness And Service Lives/Survival Curves Of Various Pavement Rehabilitation Treatments, Panagiotis Ch. Anastasopoulos, Fred L. Mannering, John E. Haddock
Effectiveness And Service Lives/Survival Curves Of Various Pavement Rehabilitation Treatments, Panagiotis Ch. Anastasopoulos, Fred L. Mannering, John E. Haddock
JTRP Technical Reports
The pavement analysis in this study considers various combinations of pavement rehabilitation treatments (two-course HMA overlay with or without surface milling, concrete pavement restoration, three-course HMA overlay with or without surface milling, three-course HMA overlay with crack and seat of PCC pavement and 3-R and 4-R overlay or replacement treatments). Six road functional classes (rural and urban of interstates, non-interstates of the NHS, and non-interstates non-NHS) are considered. This allows for estimation of the performance and service life of the pavement, corresponding to each treatment and road functional class. Main findings;
• More than 95 percent of the data points …
Earthquake Resistance Of Integral Abutment Bridges, Robert J. Frosch, Michael E. Kreger, Aaron M. Talbott
Earthquake Resistance Of Integral Abutment Bridges, Robert J. Frosch, Michael E. Kreger, Aaron M. Talbott
JTRP Technical Reports
intermediate length bridges. Integral abutment construction eliminates joints and bearings which reduce long-term maintenance costs. However, in the absence of joints and bearings, the bridge abutments and foundations must be able to accommodate lateral movements from thermal expansion and contraction of the superstructure and from seismic events. Previous research has focused on the response to thermal expansion and contraction. The current research examines the response of integral abutment bridges to seismic loading. A field investigation was conducted to examine the response of an integral abutment to lateral loading from thermal expansion and contraction. The results were used to calibrate analytical …
The I-70 Greenfield Rest Area Wetland Projects, Shih-Chieh Kao, Ting Pong Chang, Rebeka Sultana, Thomas Konopka, Rao S. Govindaraju, Barry Partridge
The I-70 Greenfield Rest Area Wetland Projects, Shih-Chieh Kao, Ting Pong Chang, Rebeka Sultana, Thomas Konopka, Rao S. Govindaraju, Barry Partridge
JTRP Technical Reports
On-site treatment of wastewater at highway rest areas poses some unique and difficult challenges because of the rural locale, high variability in wastewater flow rate and strength, and lack of knowledgeable personnel on-site. As a potential alternative, a constructed subsurface wetland system was built at the I-70 rest stop nearby Greenfield, Indiana, in 2003. This wetland system, mainly composed of three wetland cells, also includes draw-and-fill and recirculation mechanisms to increase oxygen transfer to the wastewater and improve the overall treatment performance. Special considerations for highway rest areas have been emphasized. A dynamic hydraulic model was developed to help characterize …
Practices For Seamless Transmission Of Design Data From Design Phase To Construction Equipment Operation: A Synthesis Study, Philip S. Dunston, James Monty
Practices For Seamless Transmission Of Design Data From Design Phase To Construction Equipment Operation: A Synthesis Study, Philip S. Dunston, James Monty
JTRP Technical Reports
The Indiana Department of Transportation (INDOT), in response to requests from the construction contracting community, has chosen to examine how to facilitate their contractors’ use of three-dimensional machine control (3D-MC) systems, especially GPS-based systems. INDOT recognizes that the prerequisite 3D project model, if available in its intelligent electronic form, may be leveraged by both INDOT and its project partners to automate the performance of tasks other than construction. Therefore, INDOT was compelled to initiate this study to investigate the state of technology and the experiences of other state transportation agencies (STAs) and to synthesize that information to formulate recommendations for …
Guidelines For Indot-Mpo Coordination, Myron Matlock, Jon D. Fricker
Guidelines For Indot-Mpo Coordination, Myron Matlock, Jon D. Fricker
JTRP Technical Reports
Federal legislation, such as the Safe Accountable Flexible Efficient Transportation Equity Act – A Legacy for Users (SAFETEA-LU), mandates that each state’s Department of Transportation (DOT) coordinate with the Metropolitan Planning Organizations (MPO) within the state in the development and implementation of their Long-Range Transportation Plans. However, federal legislation does not indicate how the DOT and MPOs should work together, resulting in varying collaborative strategies from case to case. Developing a set of collaborative strategies that MPOs in the state of Indiana and the DOT could use during the transportation planning process could result in faster information processing and improved …
Multi-Jurisdictional Issues Related To Congestion Management, Myron Matlock, Jon D. Fricker
Multi-Jurisdictional Issues Related To Congestion Management, Myron Matlock, Jon D. Fricker
JTRP Technical Reports
When a project intended to solve transportation problems such as congestion and access management involves multiple cities, counties, and/or state agencies, disputes can occur due to incompatible interests, resulting in project delays. Creating a mechanism that allows the agencies to communicate and work together during the planning stages can improve the effectiveness of the final plan for the project.
The purpose of this study was to develop and provide transportation agencies with coordination and collaborative strategies that could be used to help the various agencies work together on multiple projects. This study was based on a study of the literature …
Safety Impacts Of Design Exceptions, Nataliya V. Malyshkina, Fred L. Mannering, Jose E. Thomaz
Safety Impacts Of Design Exceptions, Nataliya V. Malyshkina, Fred L. Mannering, Jose E. Thomaz
JTRP Technical Reports
Compliance to the Indiana Department of Transportation's (INDOT) highway design criteria is considered essential to ensure the roadway safety. However, for a variety of reasons, situations arise where exceptions to standard-design criteria are requested and accepted after review. This research explores the impact that design exceptions have on the accident severity and accident frequency in Indiana. Data on accidents at 36 roadway sites with design exceptions and 71 without design exceptions are used in this research, and appropriate statistical models are estimated for the severity and frequency of these accidents. The results of the detailed statistical modeling show that presence …
Economic Development Performance Measures And Rural Economic Development In Indiana, Jennifer L. Sharkey, Jon D. Fricker
Economic Development Performance Measures And Rural Economic Development In Indiana, Jennifer L. Sharkey, Jon D. Fricker
JTRP Technical Reports
An important consideration when identifying and implementing transportation investments is the prospect of economic development. Government agencies are faced with the challenging task of efficiently allocating scarce resources in order to satisfy the physical needs of the state and its communities. The Indiana Department of Transportation has the difficult task of prioritizing projects involving urban and rural transportation investments while attempting to satisfy both local and state needs. Typically, urban settings provide the greatest opportunity for economic development, due to population density, public infrastructure, and ready markets. Consequently, rural areas may get left behind, becoming more isolated and unattractive from …
Mitigating The Expansive Behavior Of Chemically Treated Soils, Sochan Jung, Maria Caterina Santagata
Mitigating The Expansive Behavior Of Chemically Treated Soils, Sochan Jung, Maria Caterina Santagata
JTRP Technical Reports
Sulfate-induced heave, resulting from the chemical treatment of sulfate rich soils, has been known to cause significant damage to pavements and other structures particularly in the south-western United States. This research addressed the problem of sulfate-induced heave in coal mine spoils, formed as a result of shallow strip coal mining, after treatment with calcium-based stabilizers. These spoils occur in areas of Indiana in which substantial infrastructure development is taking place and will continue to occur in the next 10-15 years. Samples of coal mine spoils were obtained from different sites in Indiana. While the majority of the samples exhibited sulfate …
Performance-Based Contracting For Roadway Maintenance Operations In Indiana, Bob G. Mccullouch, Kumares C. Sinha, Panagiotis Ch Anastasopoulos
Performance-Based Contracting For Roadway Maintenance Operations In Indiana, Bob G. Mccullouch, Kumares C. Sinha, Panagiotis Ch Anastasopoulos
JTRP Technical Reports
INDOT initiated a study to investigate Performance Based Contracting of maintenance operations. One of the main impetus for the study is that INDOT started a ten year road building program called Major Moves that will add over a 1900 lane miles to the current network. With this addition and coupled with a trend of reduction in maintenance personnel, INDOT is planning how maintenance will be performed. One viable option is the use of performance based contracting (PBC). This study has evaluated many aspects of PBC and the current INDOT maintenance program. Study specifics included:
* Investigated foreign agencies PBC programs. …
Performance Related Specifications (Prs) For Concrete Pavements In Indiana, Volume 1: Executive Summary, Cole Graveen, Eric Max Falker, Micah Beaver, Narayanan Neithalath, W. Jason Weiss, J. Olek, Tommy Edward Nantung, Victor Lee Gallivan
Performance Related Specifications (Prs) For Concrete Pavements In Indiana, Volume 1: Executive Summary, Cole Graveen, Eric Max Falker, Micah Beaver, Narayanan Neithalath, W. Jason Weiss, J. Olek, Tommy Edward Nantung, Victor Lee Gallivan
JTRP Technical Reports
Performance-Related Specifications (PRS) are specifications that base pavement acceptance and pay adjustment on the projected performance and predicted life-cycle cost (LCC) for a specific pavement. PRS relate measurable quality characteristics with pavement performance through computer simulations that incorporate physical distress models. Previously, work at ERES consultants by Darter and co-workers developed prototype PRS for jointed plain portland cement concrete pavements (PCC) through Federal Highway Administration (FHWA) through a series of research projects. However, before this research program began, pavements have not been constructed using these specifications. This report describes the Indiana Department of Transportation’s (INDOT) experience with developing and implementing …
Performance Related Specifications (Prs) For Concrete Pavements In Indiana, Volume 2: Technical Report, Cole Graveen, Eric Max Falker, Micah Beaver, Narayanan Neithalath, W. Jason Weiss, J. Olek, Tommy Edward Nantung, Victor Lee Gallivan
Performance Related Specifications (Prs) For Concrete Pavements In Indiana, Volume 2: Technical Report, Cole Graveen, Eric Max Falker, Micah Beaver, Narayanan Neithalath, W. Jason Weiss, J. Olek, Tommy Edward Nantung, Victor Lee Gallivan
JTRP Technical Reports
Performance-Related Specifications (PRS) are specifications that base pavement acceptance and pay adjustment on the projected performance and predicted life-cycle cost (LCC) for a specific pavement. PRS relate measurable quality characteristics with pavement performance through computer simulations that incorporate physical distress models. Previously, work at ERES consultants by Darter and co-workers developed prototype PRS for jointed plain portland cement concrete pavements (PCC) through Federal Highway Administration (FHWA) through a series of research projects. However, before this research program began, pavements have not been constructed using these specifications. This report describes the Indiana Department of Transportation’s (INDOT) experience with developing and implementing …
Synthesis Of Best Practices In Transportation Security, Volume I: Vulnerability Assessment, Haritha Reddy Venna, Jon D. Fricker
Synthesis Of Best Practices In Transportation Security, Volume I: Vulnerability Assessment, Haritha Reddy Venna, Jon D. Fricker
JTRP Technical Reports
Part I of the research focused on developing a methodology to identify and evaluate the most critical and vulnerable INDOT assets. This method aims at obtaining an index that reflects the vulnerability and criticality of an asset on the basis of multiple performance criteria. This methodology was tested on the seven INDOT districts. Because not all the factors that influence the vulnerability do have same weight, the analytical hierarchical process is used to obtain the weights for the criteria. Countermeasures are suggested as a part of the research to reduce the vulnerability of a given asset based on its relevant …
Mechanistic Evaluation Of Rubblized Pcc Pavements, Yigong Ji
Mechanistic Evaluation Of Rubblized Pcc Pavements, Yigong Ji
JTRP Technical Reports
This report presents a mechanistic approach and procedures for determining layer coefficients to characterize the in-situ behaviors of rubblized pavements. This procedure was developed based on the 1993 AASHTO Pavement Design Guide utilizing Falling Weight Deflectometer (FWD) testing and in-place simulation using back-calculation layer modulus. In order to evaluate the rubblized pavement systematically, twelve constructed pavement sections were extensively tested by FWD annually after construction. The FWD data was processed using the proposed mechanistic procedure. In addition, statistical analysis was conducted to compare the pavement structure parameters each year, including layer coefficient and in-situ resilient modulus using Analysis of Variance …
Synthesis Of Best Practices In Transportation Security, Volume Ii: Emergency Response, Rodrigo Vargas, Jon D. Fricker
Synthesis Of Best Practices In Transportation Security, Volume Ii: Emergency Response, Rodrigo Vargas, Jon D. Fricker
JTRP Technical Reports
Part I of the research focused on developing a methodology to identify and evaluate the most critical and vulnerable INDOT assets. This method aims at obtaining an index that reflects the vulnerability and criticality of an asset on the basis of multiple performance criteria. This methodology was tested on the seven INDOT districts. Because not all the factors that influence the vulnerability do have same weight, the analytical hierarchical process is used to obtain the weights for the criteria. Countermeasures are suggested as a part of the research to reduce the vulnerability of a given asset based on its relevant …
Saw-Cutting Guidelines For Concrete Pavements: Examining The Requirements For Time And Depth Of Saw-Cutting, Kambiz Raoufi, Tony Their, W. Jason Weiss, Jan Olek, Tommy E. Nantung
Saw-Cutting Guidelines For Concrete Pavements: Examining The Requirements For Time And Depth Of Saw-Cutting, Kambiz Raoufi, Tony Their, W. Jason Weiss, Jan Olek, Tommy E. Nantung
JTRP Technical Reports
Joints are placed in Portland cement concrete pavements (PCCP) to control random cracking. These joints provide a weakened plane that enables a crack to form in a controlled manner, relieving residual stresses that develop when thermal, hygral, or hydration movements are resisted by sub grade and adjoining pavement. While the concept of creating a weakened plane through saw-cutting is straightforward, determining the time and depth of the saw-cut has proven to be complicated. The goal of this project was to reduce the risk for joint raveling and random cracking. Specifically, this project has focused on: developing a procedure for determining …
Trade-Off Analysis Methodology For Asset Management, Qiang Bai, Samuel Labi, Zongzhi Li
Trade-Off Analysis Methodology For Asset Management, Qiang Bai, Samuel Labi, Zongzhi Li
JTRP Technical Reports
In an era that is characterized by funding limitations, increased stakeholder participation, and the need for increased accountability and transparency, transportation agencies seek to ensure that comprehensive evaluation processes are identified and used for decision-making. Consistent with such processes is the incorporation of multiple performance criteria from different program areas, optimization of decisions under constrained budgets, and investigation of trade-offs between program areas, performance measures, budgetary levels, risk levels, and performance thresholds. To help INDOT carry out these processes, this study developed theoretical constructs for scaling and amalgamation of the different performance measures, and for analyzing the different kinds of …
High-Performance Concrete Bridge Decks: A Fast-Track Implementation Study, Volume 1: Structural Behavior, Robert J. Frosch, Timothy S. Aldridge
High-Performance Concrete Bridge Decks: A Fast-Track Implementation Study, Volume 1: Structural Behavior, Robert J. Frosch, Timothy S. Aldridge
JTRP Technical Reports
Transverse cracking of concrete bridge decks is problematic in numerous states. Cracking has been identified in the negative and positive moment regions of bridges and can appear shortly after opening the structure to live loads. To improve the service life of the bridge deck as well as decrease maintenance costs, changes to current construction practices in Indiana are being considered. A typical bridge deck was instrumented which incorporated the following: increased reinforcement amounts, decreasing reinforcement spacing, and high-performance, low-shrinkage concrete. The low shrinkage concrete was achieved using a ternary concrete mix. The objective of this research was to determine the …
Alternative Land Use Patterns To Minimize Congestion (Volume 2: Evaluating The Feasibility Of New Urbanism In An Existing Neighborhood), Huei Koh, Jon D. Fricker
Alternative Land Use Patterns To Minimize Congestion (Volume 2: Evaluating The Feasibility Of New Urbanism In An Existing Neighborhood), Huei Koh, Jon D. Fricker
JTRP Technical Reports
Urban sprawl creates serious traffic congestion. Alternative land use patterns may be the best solution. New Urbanists claim that, by placing frequently-visited sites within walking distance of homes and creating a pleasant walking environment, people are more willing to choose non-motorized transportation mode to do such activities.
Part I of this study investigated the ability of travel demand models to estimate the impacts of alternative land use patterns. Part II conducted an economic viability analysis for a mixed land use neighborhood and collected land use preferences at meetings of neighborhood associations. The objective in Part III was to evaluate the …
Methods Of Safety Improvements At Coordinated Signals, Wei Li, Andrew P. Tarko
Methods Of Safety Improvements At Coordinated Signals, Wei Li, Andrew P. Tarko
JTRP Technical Reports
In this research, the safety impact of arterial signal coordination is investigated. Based on the findings, procedures are proposed to incorporate safety considerations into signal coordination design. In addition, a software tool is developed to facilitate the use of the research findings. Signal coordination has been extensively employed as a tool to optimize an arterial system’s mobility performance, commonly measured by the total number of vehicle stops and the time of delays. Although vehicle crashes at signalized intersections have long been recognized as a major safety threat, studies to date have been limited locally to non-coordinated signals or the noncoordinated …
Investigation Of The Effective Use Of Warning Lights On Indiana Department Of Transportation (Indot) Vehicles And Equipment, Bob Mccullouch, Brandon Stevens
Investigation Of The Effective Use Of Warning Lights On Indiana Department Of Transportation (Indot) Vehicles And Equipment, Bob Mccullouch, Brandon Stevens
JTRP Technical Reports
This study was requested by INDOT to determine if current lighting packages used on INDOT maintenance vehicles, specifically snow plow vehicles, can be improved with other commercially available products. Different light products were obtained from various vendors, mounted on INDOT vehicles, and visual comparisons were performed under various lighting and weather conditions by a team of observers. The comparison evaluations were performed revealing that other light packages, LED models for most options, were brighter and certain colors more visible. The preferred light models are recommended. These recommendations were forwarded to appropriate individuals that make these decisions at INDOT. Implementation is …
Alternative Land Use Patterns To Minimize Congestion (Volume 3: Empirical Study Of Mixed Land Use Traditional Neighborhoods), Li Jin, Jon D. Fricker
Alternative Land Use Patterns To Minimize Congestion (Volume 3: Empirical Study Of Mixed Land Use Traditional Neighborhoods), Li Jin, Jon D. Fricker
JTRP Technical Reports
Urban sprawl creates serious traffic congestion. Alternative land use patterns may be the best solution. New Urbanists claim that, by placing frequently-visited sites within walking distance of homes and creating a pleasant walking environment, people are more willing to choose non-motorized transportation mode to do such activities.
Part I of this study investigated the ability of travel demand models to estimate the impacts of alternative land use patterns. Part II conducted an economic viability analysis for a mixed land use neighborhood and collected land use preferences at meetings of neighborhood associations. The objective in Part III was to evaluate the …
Use Of Micropiles For Foundations Of Transportation Structures Final Report, Hoyoung Seo, Monica Prezzi
Use Of Micropiles For Foundations Of Transportation Structures Final Report, Hoyoung Seo, Monica Prezzi
JTRP Technical Reports
In pile design, piles must be able to sustain axial loads from the superstructure without bearing capacity failure or structural damage. In addition, piles must not settle or deflect excessively in order for the serviceability of the superstructures to be maintained. In general, settlement controls the design of piles in most cases because, by the time a pile has failed in terms of bearing capacity, it is very likely that serviceability will have already been compromised. Therefore, realistic estimation of settlement for a given load is very important in design of axially loaded piles. This notwithstanding, pile design has relied …
Alternative Land Use Patterns To Minimize Congestion (Volume 1: Comparative Analysis Of Mixed Land Use And Separated Land Use Neighborhoods), Amica Bose, Jon D. Fricker
Alternative Land Use Patterns To Minimize Congestion (Volume 1: Comparative Analysis Of Mixed Land Use And Separated Land Use Neighborhoods), Amica Bose, Jon D. Fricker
JTRP Technical Reports
Urban sprawl creates serious traffic congestion. Alternative land use patterns may be the best solution. New Urbanists claim that, by placing frequently-visited sites within walking distance of homes and creating a pleasant walking environment, people are more willing to choose non-motorized transportation mode to do such activities.
Part I of this study investigated the ability of travel demand models to estimate the impacts of alternative land use patterns. Part II conducted an economic viability analysis for a mixed land use neighborhood and collected land use preferences at meetings of neighborhood associations. The objective in Part III was to evaluate the …
Safety And Operational Impacts Of Alternative Intersections, Andrew P. Tarko, Mike Inerowicz, Brandon Lang
Safety And Operational Impacts Of Alternative Intersections, Andrew P. Tarko, Mike Inerowicz, Brandon Lang
JTRP Technical Reports
As the degradation of service at some conventional intersections increases, there becomes a need for alternative solutions other than expensive interchanges. Many alternative intersections have been proposed in the past. Under certain traffic and local conditions some solutions are more promising than other. In some cases, the conventional intersection may still be the optimal choice. The presented research focused on developing guidelines that would help planners and designers identify the most promising solutions for further analysis. This objective has been addresses in two ways. Firstly, the existing knowledge on alternative intersections has been identified. Secondly, the performance of conventional and …
Development Of An Integrated Land-Use Transportation Model For Indiana, Li Jin, Jon D. Fricker
Development Of An Integrated Land-Use Transportation Model For Indiana, Li Jin, Jon D. Fricker
JTRP Technical Reports
The Indiana Department of Transportation has an operational statewide travel demand model (ISTDM). INDOT also has used the Land Use Central Indiana (LUCI) model to forecast conversion of land to residential and employment uses in future decades over a 44-county area in central Indiana. This paper describes how the LUCI model was expanded to cover the same geographic area as the ISTDM, how the internal structure of each model was made to be compatible with the other model, and how the outputs from each model were made to be suitable as inputs to the other model. The result is an …
Analysis And Determination Of Axle Load Spectra And Traffic Input For The Mechanistic-Empirical Pavement Design Guide, Yi Jiang, Shuo Li, Tommy E. Nantung, Huaxin Chen
Analysis And Determination Of Axle Load Spectra And Traffic Input For The Mechanistic-Empirical Pavement Design Guide, Yi Jiang, Shuo Li, Tommy E. Nantung, Huaxin Chen
JTRP Technical Reports
The values of equivalent single axle loads (ESAL) have been used to represent the vehicle loads in pavement design. To improve the pavement design procedures, a new method, called the Mechanistic-Empirical Pavement Design Guide (MEPDG), has been developed to use the axle load spectra to represent the vehicle loads in pavement design. These spectra represent the percentage of the total axle applications within each load interval for single, tandem, tridem, and quad axles. Using axle load spectra as the traffic input, the MEPDG method is able to analyze the impacts of varying traffic loads on pavement and provide an optimal …
Assessment Of Axially-Loaded Pile Dynamic Design Methods And Review Of Indot Axially-Loaded Pile Design Procedure, Dimitrios Loukidis, Rodrigo Salgado, Grace Abou-Jaoude
Assessment Of Axially-Loaded Pile Dynamic Design Methods And Review Of Indot Axially-Loaded Pile Design Procedure, Dimitrios Loukidis, Rodrigo Salgado, Grace Abou-Jaoude
JTRP Technical Reports
The general aim of the present research is to identify areas of improvement and propose changes in the current methodologies followed by INDOT for design of axially loaded piles, with special focus on the dynamic analysis of pile driving. Interviews with INDOT geotechnical engineers and private geotechnical consultants frequently involved in INDOT’s deep foundation projects provided information on the methods and software currently employed. It was found that geotechnical engineers rely on static unit soil resistance equations that were developed over twenty years ago and that have a relatively large degree of empiricism. Updated and improved static design equations recently …
Evaluation Of Performance And Design Of Ultra-Thin Whitetopping (Bonded Concrete Resurfacing) Using Large-Scale Accelerated Pavement Testing, Scott Newbolds, Jan Olek
Evaluation Of Performance And Design Of Ultra-Thin Whitetopping (Bonded Concrete Resurfacing) Using Large-Scale Accelerated Pavement Testing, Scott Newbolds, Jan Olek
JTRP Technical Reports
Ultra-Thin Whitetopping (UTW) is a pavement rehabilitation technique that involves the placement of a thin Portland Cement Concrete (PCC) overlay, 2 inches (50 mm) to 4 inches (100 mm) thick, over a distressed Hot Mix Asphalt (HMA) pavement. Typically, the HMA pavement is milled and cleaned which helps to create a bond between the existing HMA pavement and the PCC overlay. The bond between the two layers promotes composite action of the pavement section and as a result has a direct impact on the performance of the UTW Pavement. This composite action allows for the reduced thickness in the UTW …
Real-Time Arterial Traffic Signal Performance Measures, Christopher M. Day, Edward J. Smaglik, Darcy M. Bullock, James R. Sturdevant
Real-Time Arterial Traffic Signal Performance Measures, Christopher M. Day, Edward J. Smaglik, Darcy M. Bullock, James R. Sturdevant
JTRP Technical Reports
Increasing demand for highway system capacity compels transportation agencies to extract as much capacity as possible from existing systems. Traffic signals represent a major component of highway systems. Improvement of traffic signal operation requires accurate performance measures. Despite recent improvements in computing technology, traffic signal controllers are currently not able to capture useful performance measures on a cycle-by-cycle basis. This report presents a set of performance measures that could be collected on a cycle-by-cycle basis by a traffic signal controller given the capability to log phase indications and detector actuations. The performance measures investigated here include the volume-to-capacity ratio and …