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Articles 31 - 42 of 42
Full-Text Articles in Engineering
Adapting Crash Modification Factors For The Connected And Autonomous Vehicle Environment, Federico Valentin Lause Iii
Adapting Crash Modification Factors For The Connected And Autonomous Vehicle Environment, Federico Valentin Lause Iii
Theses and Dissertations--Civil Engineering
The Crash Modification Factor (CMF) clearinghouse can be used to estimate benefits for specific highway safety countermeasures. It assists safety professionals in the allocation of investments. The clearinghouse contains over 7000 entries of which only 446 are categorized as intelligent transportation systems or advanced technology, but none directly address connected or autonomous vehicles (CAVs). Further, the effectiveness of highway safety countermeasures is assumed to remain constant over time, an assumption that is particularly problematic as new technologies are introduced. For example, for the existing fleet of human-driven vehicles, installation of rumble strip can potentially reduce “run-off-road” crashes by 40%. If …
E-Construction Technologies For Efficient Highway Construction Inspections, Dhaivat Patel
E-Construction Technologies For Efficient Highway Construction Inspections, Dhaivat Patel
Theses and Dissertations--Civil Engineering
Over recent years, organizations such as the Federal Highway Administration and Departments of Transportation across the United States have showed interest in automating highway construction processes. The addition of e-Construction and other advanced technologies can significantly improve the efficiency and safety of highway paving operations, specifically paving inspections. Activities such as collecting load tickets, tracking pavement lay-down temperatures, and monitoring roller movement are antiquated practices that DOT inspectors perform during paving operations. E-Ticketing, Paver Mounted Thermal Profiling, and Intelligent Compaction were proposed to automate paving inspections and were recently tested in two resurfacing pilot projects in the state of Kentucky. …
Connected And Autonomous Vehicles Effects On Emergency Response Times, Austin William Obenauf
Connected And Autonomous Vehicles Effects On Emergency Response Times, Austin William Obenauf
Theses and Dissertations--Civil Engineering
Emergency response times have been shown to be directly correlated with mortality rates of out-of-hospital patients. Studies have been conducted to show the relationship between time and mortality rates until patients receive the proper treatment. With more cardiac arrests and other life threatening illnesses occurring in the United States, more emergency calls will be required as well. As of today, technological advancements have been made to reduce response times, but human factors still require certain procedures, causing delays in the run time and increasing the rate of mortality. Here we show the results of emergency response times with the market …
Redefining Construction “As-Built” Plans To Meet Current Kentucky Transportation Cabinet Needs, Victoria Lynn Lasley
Redefining Construction “As-Built” Plans To Meet Current Kentucky Transportation Cabinet Needs, Victoria Lynn Lasley
Theses and Dissertations--Civil Engineering
As-built drawings are the traditional method used by the construction industry to record changes made during construction. As-builts provide valuable information for new design projects as well as rehabilitation and remediation projects. The completeness and accuracy of these plans are essential for transportation industries and their success. While the importance of as-builts is widely recognized, the process of creating them has proven to be difficult. It is a time consuming process and entities often lack the resources necessary to complete accurate and detailed as-builts. After an investigation of current as-built operations within State Transportation Agencies, recommendations have been made to …
An Assessment Of Historical Traffic Forecast Accuracy And Sources Of Forecast Error, Jawad Mahmud Hoque
An Assessment Of Historical Traffic Forecast Accuracy And Sources Of Forecast Error, Jawad Mahmud Hoque
Theses and Dissertations--Civil Engineering
Transportation infrastructure improvement projects are typically huge and have significant economic and environmental effects. Forecasts of demand of the facility in the form of traffic level help size the project as well as choose between several alternatives. Inaccuracy in these forecasts can thus have a great impact on the efficiency of the operational design and the benefits accrued from the project against the cost. Despite this understanding, evaluation of traffic forecast inaccuracy has been too few, especially for un-tolled roads in the United States. This study, part of a National Cooperative Highway Research Program (NCHRP) funded project, bridges this gap …
Evaluate Probe Speed Data Quality To Improve Transportation Modeling, Fahmida Rahman
Evaluate Probe Speed Data Quality To Improve Transportation Modeling, Fahmida Rahman
Theses and Dissertations--Civil Engineering
Probe speed data are widely used to calculate performance measures for quantifying state-wide traffic conditions. Estimation of the accurate performance measures requires adequate speed data observations. However, probe vehicles reporting the speed data may not be available all the time on each road segment. Agencies need to develop a good understanding of the adequacy of these reported data before using them in different transportation applications. This study attempts to systematically assess the quality of the probe data by proposing a method, which determines the minimum sample rate for checking data adequacy. The minimum sample rate is defined as the minimum …
Improving Bicycle Infrastructure With The Use Of Bicycle Share Travel Data, Jennifer Mintao Weast
Improving Bicycle Infrastructure With The Use Of Bicycle Share Travel Data, Jennifer Mintao Weast
Theses and Dissertations--Civil Engineering
Bicycling as a mode of transportation has been increasing in recent years due to its environmental and health benefits. The availability of bicycles through bicycle share programs has made bicycling a more viable option. With this increase, there is a need for complementary improvements of bicycle infrastructure. Many local and regional transportation agencies are recognizing this need and developing a master plan or safety action plan to improve the city’s bicycle and walking facilities. This study examines bicycle travel demands and travel patterns in Lexington, Kentucky as generated by SPIN bicycle share users. It is hypothesized that the SPIN users …
Quantifying The Impact Of Transportation Network Companies (Tncs) On Traffic Congestion In San Francisco, Sneha Roy
Theses and Dissertations--Civil Engineering
This research investigates whether Transportation Network Companies (TNCs), such as Uber and Lyft, live up to their stated vision of reducing congestion by complementing transit and reducing car ownership in major cities. The objective of this research study is to answer the question: are TNCs are correlated to traffic congestion in the city of San Francisco? If found to be so, do they increase or decrease traffic congestion for the case of San Francisco? If and how TNC pickups and drop-offs impact traffic congestion within San Francisco? And finally, how does the magnitude of this measured command of TNCs on …
Deterioration Modelling Of Bridges On Brm 5.2.3, Sudhir Palle, Theodore Hopwood Ii
Deterioration Modelling Of Bridges On Brm 5.2.3, Sudhir Palle, Theodore Hopwood Ii
Kentucky Transportation Center Research Report
The Kentucky Transportation Cabinet (KYTC) initiated the study KYSPR 17-532, “Deterioration Modelling of Bridges on BrM 5.2.3,” so it could receive assistance identifying and employing bridge deterioration and cost forecast modeling for its bridge maintenance program. The Kentucky Transportation Center (KTC) was to help coordinate KYTC in adapting BrM 5.2.3’s deterioration and cost modelling features and update the existing guide material to reflect all changes for BrM 5.2.3. This study included acquiring access and becoming familiar with AASHTO Bridge Management (BrM 5.2.3) software. It was also to explore opportunities for any training on BrM and BrM 5.2.3’s deterioration and cost …
Kentucky Traffic Collision Facts 2018, Eric R. Green, Paul A. Ross, Christopher L. Blackden, Kentucky State Police
Kentucky Traffic Collision Facts 2018, Eric R. Green, Paul A. Ross, Christopher L. Blackden, Kentucky State Police
Kentucky Transportation Center Research Report
KENTUCKY’S TRAFFIC COLLISION FACTS report is based on collision reports submitted to the Kentucky State Police Records Branch. As required by Kentucky Revised Statutes 189.635, “every law enforcement agency whose officers investigate a vehicle accident of which a report must be made...shall file a report of the accident...within ten days after investigation of the accident upon forms supplied by the bureau.” The stated purpose of this requirement is to utilize data on traffic collisions for such purposes as will improve the traffic safety program in the Commonwealth. Data contained in this report are based solely on the observations and judgements …
Investigating The Use Of In-Place Lateral Pull Off Tests To Determine The Compressive Strength Of Structural Concrete, Charlie Sun
Investigating The Use Of In-Place Lateral Pull Off Tests To Determine The Compressive Strength Of Structural Concrete, Charlie Sun
Kentucky Transportation Center Research Report
The Kentucky Transportation Cabinet’s current practice for determining the compressive strength of structural concrete consists of two methods. Both methods require that samples be delivered to an off-site facility for testing. Accordingly, affected parties on the project site must wait for the delivery of samples to the off-site facility, the performance of tests and analysis of test data, and the return of test results to the project site. Analysis of existing structural concrete requires core samples to be taken from the structural element in question. As a result, sample locations must be patched and repaired. Sampling can also potentially damage …
Inventory Of Hazardous Materials Shipments Moving Into Fayette County, Kentucky, Candice Y. Wallace, Bryan Gibson, Steven Douglas Kreis
Inventory Of Hazardous Materials Shipments Moving Into Fayette County, Kentucky, Candice Y. Wallace, Bryan Gibson, Steven Douglas Kreis
Kentucky Transportation Center Research Report
Each day, significant quantities of hazardous materials are transported through Fayette County. The bulk of the materials pass through without incident, but some vehicles carrying them are involved in roadway incidents and/or accidents. However, first responders and management personnel lack clear knowledge of what hazardous material commodities are on central Kentucky’s roads. This project was designed to provide a high level analysis of hazardous material commodity flows in Fayette County.