Sign Retroreflectivity Study,
2012
Texas Transportation Institute
Sign Retroreflectivity Study, Austin Lyons Bischoff, Darcy M. Bullock
Darcy M Bullock
Signing is a big yearly cost to state DOT’s in sign maintenance and replacement costs. In 2001 the Indiana Department of Transportation (INDOT) replaced 14,930 signs at a cost of $1,067,931 and did maintenance work on 34,084 signs at a cost of $2,136,076. Recently, guidelines have been proposed by the Federal Highway Administration (FHWA) for minimum retroreflectivity of traffic signs for state, county, and city roads in the United States. The purpose of this study was to evaluate if the majority of the signs currently used by INDOT will meet the new minimum requirements proposed by the FHWA. In addition, …
Quantifying Benefits Of Traffic Signal Retiming,
2012
Purdue University
Quantifying Benefits Of Traffic Signal Retiming, Christopher Day, Thomas Brennan, Hiromel Premachandra, Alexander Hainen, Stephen Remias, James Sturdevant, Greg Richards, Jason Wasson, Darcy Bullock
Darcy M Bullock
Improvements in the quality of service on a signalized intersection or arterial can be interpreted as a reduction in the user cost of service, which is expected to induce demand based on economic theory. This report presents a methodology for measuring and interpreting changes to user costs, and determining whether demand was induced. High-resolution signal event data and Bluetooth device MAC address matching are demonstrated in three case studies with the purpose of quantifying the impacts of changes in signal timing plans. In the first case study, 21 months of vehicle volume data are used to test whether demand was …
Virtual Weigh Station,
2012
Designed Conveyor Systems
Virtual Weigh Station, John Gregory Green, Andrew P. Nichols, Ed Allen, Luke Nuber, Jose E. Thomaz, Darcy M. Bullock, Guy Boruff, Jay Wasson, Mark Newland
Darcy M Bullock
Overweight trucks shorten highway life and indirectly increase the costs of maintaining roads. Improved methods for enforcement of commercial vehicle weight laws may increase the number of overweight vehicles caught, thereby prolonging highway life. Improved enforcement may also reduce the number of illegally operating vehicles. This report describes the concept of using existing INDOT Weigh-In-Motion equipment, a laptop computer, and wireless communication equipment, to develop a virtual weigh station screening tool. The Virtual Weigh Station screening tool developed in this project allows officers to read the weights of vehicles crossing WIM scales, in real time, in their patrol cars. Giving …
Dataset For Investigating Computational Efficiency Of Alternative Arterial Offset Optimization Algorithms,
2012
Purdue University
Dataset For Investigating Computational Efficiency Of Alternative Arterial Offset Optimization Algorithms, Christopher Day, Darcy Bullock
Darcy M Bullock
No abstract provided.
Evaluation Of Selected Video Detection Systems At Signalized Intersections,
2012
Structurepoint
Evaluation Of Selected Video Detection Systems At Signalized Intersections, Jeromy L. Grenard, Darcy M. Bullock, Andrzej P. Tarko
Darcy M Bullock
Video detection technologies have been emerging in recent years as a viable alternative to inductive loop detectors to actuate intersection signal controllers. There is a need for quantitative evaluation procedures for documenting the performance of video detection technologies. This quantitative data is needed to qualify systems for procurement and provide benchmarks for training traffic signal technicians that deploy and maintain these systems. This research makes use of two new evaluation procedures for video detection, with several measures of performance. The first of these evaluation procedures involves the comparison of the occupancy times of inductive loop detectors and video detectors to …
Design Guidelines For Deploying Closed Loop Systems,
2012
Selected Works
Design Guidelines For Deploying Closed Loop Systems, Andrew P. Nichols, Darcy M. Bullock
Darcy M Bullock
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 …
Stochastic Algorithm For Improved Operations At Isolated High Speed Intersections,
2012
University of Nebraska - Lincoln
Stochastic Algorithm For Improved Operations At Isolated High Speed Intersections, Anuj Sharma, Darcy M. Bullock, Srinivas Peeta
Darcy M Bullock
The current practice of specifying simultaneous gap out logic at isolated high speed signalized intersections places constraints on the signal controller logic that cannot be satisfied under high congestion level. Further, it often results in degraded signal efficiency and dilemma zone protection. A stochastic approach is proposed in this paper with the objective of increasing safety and efficiency at these intersections.
Real-Time Arterial Traffic Signal Performance Measures,
2012
Selected Works
Real-Time Arterial Traffic Signal Performance Measures, Christopher Day, Edward Smaglik, Darcy Bullock, James Sturdevant
Darcy M Bullock
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 …
Input-Output And Hybrid Techniques For Real-Time Prediction Of Delay And Maximum Queue Length At Signalized Intersections,
2012
University of Nebraska - Lincoln
Input-Output And Hybrid Techniques For Real-Time Prediction Of Delay And Maximum Queue Length At Signalized Intersections, Anuj Sharma, Darcy M. Bullock, James A. Bonneson
Darcy M Bullock
Vehicle delay and queue length are quantitative measures of intersection performance. The technological advancement in the field of vehicle sensors and traffic controllers has reached a point where it has enabled efficient measurement of these performance measures. Two techniques are presented for real-time measurement of vehicle delay and queue length at a signalized Intersection, and these automated delay and queue estimates are compared with manually ground-truthed measurement. These techniques were evaluated at an instrumented intersection in Noblesville, Indiana. The root-mean-square error by both techniques was below 0.7 veh-s for-estimation of average delay and less than 0.15 vehicle for estimation of …
Pilot Study On Real-Time Calculation Of Arrival Type For Assessment Of Arterial Performance,
2012
Purdue University
Pilot Study On Real-Time Calculation Of Arrival Type For Assessment Of Arterial Performance, Edward J. Smaglik, Darcy M. Bullock, Anuj Sharma
Darcy M Bullock
The Highway Capacity Manual uses the arrival type (AT) as a mechanism to account for the quality of traffic signal coordination in the calculation of delay at a signalized intersection. Although there is much discussion in the literature regarding the accuracy and precision of this approach, the AT parameter provides a simple mechanism for grading the performance of traffic signal coordination. This paper describes data collection limitations of current traffic signal controllers and proposes a procedure where the AT parameter can be calculated by traffic signal controllers in real time. Given that the nation received a score of 61 out …
Quality Control Procedures For Weigh-In-Motion Data,
2012
Marshall University
Quality Control Procedures For Weigh-In-Motion Data, Andrew P. Nichols, Darcy M. Bullock
Darcy M Bullock
For the past two decades, weigh-in-motion (WIM) sensors have been used in the United States to collect vehicle weight data for designing pavements and monitoring their performance. The use of these sensors is now being expanded for enforcement purposes to provide virtual weigh stations for screening vehicles in traffic streams for overweight violations. A study found that static weigh stations in Indiana were effective for identifying safety violations, but ineffective for identifying overweight vehicles. It was also determined that the alternative approach to identifying overweight vehicles using virtual weigh stations requires a high level of WIM data accuracy and reliability …
Performance Requirements And Evaluation Procedures For Advance Wide Area Detectors,
2012
University of Nebraska at Lincoln
Performance Requirements And Evaluation Procedures For Advance Wide Area Detectors, Anuj Sharma, Matthew Harding, Brad Giles, Darcy M. Bullock, James R. Sturdevant, Srinivas Peeta
Darcy M Bullock
Dilemma zone protection ideally requires the exact position and speed of all the vehicles approaching the intersection. However, point detectors, typically used to protect vehicle incursion into the dilemma zone, only provide binary information about the presence or absence of a vehicle at a fixed point in space. The information regarding position and speed of the vehicle in subsequent time steps is extrapolated. The extrapolation error increases with the increase in projection time. Wide area detector (WAD) overcomes this drawback by tracking each vehicle at all times until they move out of range. Such a detector has the potential to …
Vendor Comparison Of Video Detection Systems,
2012
Purdue
Vendor Comparison Of Video Detection Systems, Avery Rhodes, Edward J. Smaglik, Darcy M. Bullock
Darcy M Bullock
Video detection has become increasingly popular for presence detection at signalized intersections because of its versatility. However, several reports have documented performance problems in specific systems. This paper quantifies the performance of three different commercially available video detection systems. The systems were tested in May and September 2005 for presence detection accuracy. Prior to the May 2005 test, a representative from each vendor configured the video detection zones to match the loop detection zone as closely as possible. The outputs from the loop detection for the through-right and left-turn lane groups were compared with the corresponding output from each of …
A Real-Time Offset Transitioning Algorithm For Coordinating Traffic Signals,
2012
Selected Works
A Real-Time Offset Transitioning Algorithm For Coordinating Traffic Signals, Darcy M. Bullock, Montasir Abbas
Darcy M Bullock
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 …
Developing And Implementing Strategies To Address “Freddie Freeroader”,
2012
University of Kentucky
Developing And Implementing Strategies To Address “Freddie Freeroader”, David Q. Hunsucker, Mark S. Spellman, Mark Bell
Kentucky Transportation Center Research Report
Although the majority Kentucky’s citizens pay their fair share of motor vehicle registration taxes, there are indications that a number of citizens evade motor vehicle property and usage tax through a variety of means. Some individuals license their cars in states that have no, or very low, property taxes on motor vehicles; others abuse the use of temporary tags, or simply fail to renew the registration on their vehicles. As a result, Kentucky is losing income that would be used to repair the state’s roadways and fund local services such as schools, libraries, health departments, and police and fire services. …
Climate Change In Cyprus: Impacts And Adaptation Measures,
2012
Cyprus University of Technology
Climate Change In Cyprus: Impacts And Adaptation Measures, Theodoros Zachariadis
Theodoros Zachariadis
No abstract provided.
Climate Change In Cyprus – Impacts And Adaptation Policies,
2012
Cyprus University of Technology
Climate Change In Cyprus – Impacts And Adaptation Policies, Elpida Shoukri, Theodoros Zachariadis
Theodoros Zachariadis
This report provides a literature review of climate change facts and projections globally, for Europe, Mediterranean and Cyprus until the end of the 21st century. It focuses on climate change effects in Cyprus by sector and presents specific recommendations on the implementation of a proper adaptation strategy. The report is based on a review of the most important recent studies on climate change, including reports from international organizations as well as European and Mediterranean authorities and research institutions. The report has also benefited from information gathered through personal communication of the authors with public authorities, non-governmental organizations and researchers.
Level Of Effort Of Indiana Counties,
2012
Purdue University
Level Of Effort Of Indiana Counties, Indiana Ltap
Indiana Local Technical Assistance Program (LTAP) Publications
This report shows the level of effort of Indiana counties for which an operations report was available. It is based on 2010 calendar year information retrieved from the Indiana Tax Handbook, Comprehensive Annual Financial Report, County Operations Reports and information provided from the Indiana State Auditor’s office regarding County Distributions.
2010 Statewide Bridge Sufficiency Rating Report,
2012
Purdue University
2010 Statewide Bridge Sufficiency Rating Report, Indiana Ltap
Indiana Local Technical Assistance Program (LTAP) Publications
The main purpose of this report is to provide bridge sufficiency rating information for the bridges in each county. This information results from the data generated by the National Bridge Inspection Standards (NBIS) program authorized by the 1968 Federal Aid Highway Act.
2012 Directory Of Indiana State, County, City And Town Officials Responsible For Road And Street Work,
2012
Lyles School of Civil Engineering
2012 Directory Of Indiana State, County, City And Town Officials Responsible For Road And Street Work, Indiana Ltap
Indiana Local Technical Assistance Program (LTAP) Directory
Contact information for local agency officials and employees responsible for Indiana’s local road infrastructure.
