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Articles 1 - 14 of 14
Full-Text Articles in Engineering
A Real-Time Offset Transitioning Algorithm For Coordinating Traffic Signals, Darcy M. Bullock, Montasir Abbas
A Real-Time Offset Transitioning Algorithm For Coordinating Traffic Signals, Darcy M. Bullock, Montasir Abbas
JTRP Technical Reports
This report introduces an adaptive real-time offset transitioning algorithm that can be viewed as an integrated optimization approach designed to work with traditional coordinated-actuated systems. The Purdue Real-Time Offset Transitioning Algorithm for Coordinating Traffic Signals (PRO-TRACTS) adds to the controllers the ability to adaptively change their offsets in response to changes in traffic pattern, providing an intermediate solution between traditional coordinated-actuated control systems and adaptive control systems. To facilitate implementation, a new National Transportation Communication for ITS Protocol (NTCIP) object for capturing detector actuation at the controller’s level is defined in this report. The unique cycle-based tabulation of volume and …
Development And Evaluation Of Cement-Based Materials For Repair Of Corrosion-Damaged Reinforced Concrete Slabs, Rongtang Liu, J. Olek
Development And Evaluation Of Cement-Based Materials For Repair Of Corrosion-Damaged Reinforced Concrete Slabs, Rongtang Liu, J. Olek
JTRP Technical Reports
In this study, the results of an extensive laboratory investigation conducted to evaluate the properties of concrete mixes used as patching materials to repair reinforced concrete slabs damaged by corrosion are reported. Seven special concrete mixes containing various combinations of chemical or mineral admixtures were developed and used as a patching material to improve the durability of the repaired slabs. Physical and mechanical properties of these mixes, such as compressive strength, static modulus of elasticity, dynamic modulus of elasticity, and shrinkage were evaluated. Durability-related parameters investigated included resistance of concrete to penetration of chloride ions and freeze-thaw resistance. The results …
Development Of A Procedure To Identify Aggregates For Bituminous Surfaces In Indiana, Terry R. West, Kyu H. Cho
Development Of A Procedure To Identify Aggregates For Bituminous Surfaces In Indiana, Terry R. West, Kyu H. Cho
JTRP Technical Reports
Adequate friction resistance is needed to prevent pavement slipperiness allowing vehicles to stop in a reasonable distance. For stone mastic asphalt surfaces, friction resistance is mainly a function of the interaction between the aggregates exposed at the road surface and vehicle tires. Aggregate performance is reduced with time by wear and polishing as a consequence of vehicular traffic. In this research a method to investigate performance based on physical, chemical and petrographic factors has been evaluated. The objective was to develop a laboratory method to test Indiana dolomite, limestone, sandstone, and gravel aggregates to predict friction resistance in the field …
Evaluation Of The Implementation Of Hot Pour Sealants And Equipment For Crack Sealing In Indiana, David R. Ward
Evaluation Of The Implementation Of Hot Pour Sealants And Equipment For Crack Sealing In Indiana, David R. Ward
JTRP Technical Reports
This study was initiated as an implementation effort that would monitor, assist with and report on a new maintenance activity involving the trial use of hot pour crack sealant. Work associated with this new activity was qualitatively assessed over a period of several years. INDOT began by purchasing six oil-jacketed melters that were distributed to various sub-districts. Previous INDOT research indicated using hot pour sealant might save on labor expense because it lasted significantly longer than the current emulsion. Random observations were made of various sub-district crews using hot pour sealant and the results were reported to appropriate personnel. Inspections …
Seismic Design Of Deep Foundations, Antonio Bobet, Rodrigo Salgado, Dimitrios Loukidis
Seismic Design Of Deep Foundations, Antonio Bobet, Rodrigo Salgado, Dimitrios Loukidis
JTRP Technical Reports
Detailed investigations of pile foundations affected by earthquakes around the world since the 1960’s indicate that pile foundations are susceptible to damage to such a degree that the serviceability and integrity of the superstructure may be affected. Although numerous cases of seismically damaged piles are reported, the detailed mechanisms causing the damage are not yet fully understood. As a consequence, an effective seismic design of pile foundations has not been yet established in practice. Many road bridge structures supported on piles exist in southern Indiana. This is a region where the risk of occurrence of a dangerous earthquake is high …
Follow-Up Study To Fhwa/In/Jhrp-92/22: Development Of A Strategy For Compliance With Epa And Osha Regulations Applicable To Indot Facilities, Lynn A. Corson
Follow-Up Study To Fhwa/In/Jhrp-92/22: Development Of A Strategy For Compliance With Epa And Osha Regulations Applicable To Indot Facilities, Lynn A. Corson
JTRP Technical Reports
The objectives of this research were - 1. To assess the department’s progress at selected facilities toward minimizing, reducing, recycling, reusing, reclaiming and eliminating by-products of operations classified as hazardous, solid or special waste. The department’s progress toward modifying or eliminating (such as by contracting) operations or its use of alternate products to reduce potential environmental liability and associated costs will be examined, 2. To observe and analyze selected operations at a sample of facilities visited during the first study [March 1990 – November 1992] to identify where additional strengthening is needed. Additional facilities recommended by the department will also …
Development Of Low Cost Retaining Walls For Indiana Highways, Philippe L. Bourdeau, Patrick J. Fox, David Joseph Runser, Jin-Pyo Lee
Development Of Low Cost Retaining Walls For Indiana Highways, Philippe L. Bourdeau, Patrick J. Fox, David Joseph Runser, Jin-Pyo Lee
JTRP Technical Reports
Low-cost alternatives to traditional modular facing reinforced soil retaining walls were reviewed, on the basis of published data and information. Technological information, design methods and observed performance of segmental facing reinforced soil walls were used for this review. Guidelines are proposed for selection, design and construction of such retaining walls, within a limited range of conditions, in Indiana highway projects.
Development And Application Of Linear Scheduling Techniques To Highway Construction Projects, D. J. Harmelink, Rene Antonio Yamin
Development And Application Of Linear Scheduling Techniques To Highway Construction Projects, D. J. Harmelink, Rene Antonio Yamin
JTRP Technical Reports
Crucial to the successful outcome of major highway construction and reconstruction projects today is the ability to accurately plan, predict and control the construction process. Evermore sensitive to budget control, schedule control, resource allocation and impacts on the motoring public, highway constructors today require sophisticated project management tools to achieve project goals. One of the tools recently being used across the country is project scheduling. The use of scheduling techniques on highway projects has grown out of the successful application of these methods to building construction for the past 20 to 30 years. Unfortunately, the effective application of traditional scheduling …
Evaluation And Policy For Bridge Deck Expansion Joints, Luh M. Chang, Yao-Jong Lee
Evaluation And Policy For Bridge Deck Expansion Joints, Luh M. Chang, Yao-Jong Lee
JTRP Technical Reports
This report is an overview of the research that was performed for the Indiana Department of Transportation (INDOT) concerning the performance of bridge deck expansion joints. The purpose of the research is to evaluate several types of joints currently in use and also provides the evaluation criteria for rating the joint condition. The types of joints investigated are Compression Seal (B.S.) joint, Strip Seal (S.S.) joint, Integral Abutment Jointless (I.A.) joint, Poured Silicone (XJS) joint, and Polymer Modified Asphalt (LDI and PaveTech) joint. The research was performed by questionnaire surveys, Roadway Management data analysis, expert interviews, and site assessment. The …
Evaluation Of Zero Velocity Deicer Spreader And Salt Spreader, Tommy E. Nantung
Evaluation Of Zero Velocity Deicer Spreader And Salt Spreader, Tommy E. Nantung
JTRP Technical Reports
Increasing traffic volumes and declining resources have led to a need for innovative winter maintenance strategies, techniques, equipment and materials while not sacrificing the safety of the traveling public. Any reduction of salt usage will ease fund for other maintenance operations while minimizing salt runoff on surface and ground waters and effect of road salt on roadside vegetation. In the past, conventional spreaders have been designed for sand and are generally incapable of metering the lower, more precise amount of salt desired. The use of materials in solid form demands critical timing of the application to minimize loss of the …
Real-Time Determination Of Soil Type, Water Content, And Density Using Electromagnetics, Vincent P. Drnevich, Chih-Ping Lin, Quanghee Yi, Janet Elaine Lovell
Real-Time Determination Of Soil Type, Water Content, And Density Using Electromagnetics, Vincent P. Drnevich, Chih-Ping Lin, Quanghee Yi, Janet Elaine Lovell
JTRP Technical Reports
The primary objective of this study was to explore the potential use of electromagnetic characteristics of soils using the Time Domain Reflectometry (TDR) technique to identify physical properties of soils. Three fundamental studies in this exploration are the frequencydependent electromagnetic properties of soils, the wave propagation in a TDR system, and the inverse analyses of TDR waveforms. The three-phase model for soils was extended to a four-phase model so as to account for the interface effect and hence the soil fineness. The physical parameters of the four-phase model are related to the frequency-dependent dielectric permitivity of the soil through a …
Design Guidelines For Deploying Closed Loop Systems, Andrew P. Nichols, Darcy M. Bullock
Design Guidelines For Deploying Closed Loop Systems, Andrew P. Nichols, Darcy M. Bullock
JTRP Technical Reports
Closed loop systems are becoming the preferred method of operating coordinated traffic signal systems. Some of the benefits of a closed loop system include remote controller access, synchronization of controller time clocks, and orderly transition between coordination plans. With ensured time clock synchronization, the coordination of traffic signals becomes more reliable, which leads to optimal vehicle progression through the system. However, due to the complexity and relative infrequent implementation in more rural districts of closed loop systems, it is very difficult to obtain a successful deployment. This manual provides a step-by-step procedure for designing the parameters, implementing, testing, and field …
Development Of Improved Pavement Performance Prediction Models For The Indiana Pavement Management System, Sedat Gulen, Karen Zhu, John Weaver, Jie Shan, William F. Flora
Development Of Improved Pavement Performance Prediction Models For The Indiana Pavement Management System, Sedat Gulen, Karen Zhu, John Weaver, Jie Shan, William F. Flora
JTRP Technical Reports
The Indiana Department of Transportation (INDOT) is increasingly committed to the Pavement Management System. For this reason, updated simple pavement performance prediction models with the least number of explanatory (independent) variables are required to predict the performance of various pavement types for future planning of rehabilitation or replacement. In Indiana, the two main pavement types are jointed concrete pavement (JCP) and bituminous pavement (BIT). 1999 and 2000 year data were used to develop regression models for different pavement types for the Interstate and Non- Interstate Roads systems. The International Roughness Index (IRI), in inches per mile, was mainly used for …
An Analysis Of Speed Limit Policies For Indiana, Nisar M. Khan, Kumares C. Sinha
An Analysis Of Speed Limit Policies For Indiana, Nisar M. Khan, Kumares C. Sinha
JTRP Technical Reports
The repeal of the National maximum Speed Limit law in 1995 enabled individual states to set their own speed limits. Speed limits are necessary to ensure mobility while preserving highway safety. It is important that states continually monitor and evaluate existing operating speeds in the context of changing patterns of travel, and changing characteristics of highways, vehicles, drivers, and land-use. Any efforts to review existing speed limits should be accompanied by evaluation of policy impacts such as safety and economic productivity. The goal of this research is to develop a set of speed limit policy guidelines for the state. The …