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Articles 1 - 7 of 7
Full-Text Articles in Engineering
Performance Measure For Transportation Network: A Study In Travel Time Dynamics, Anuj Nayyar
Performance Measure For Transportation Network: A Study In Travel Time Dynamics, Anuj Nayyar
UNLV Theses, Dissertations, Professional Papers, and Capstones
Arterial Performance Measurement and Monitoring is one of the leading goals of any transportation agency. The complexity of the differences between performance measures is highlighted and the various data collection methodologies are highlighted. A major performance measure that impacts end users and traffic planners is travel time. This study presents defining a mathematical system for modeling travel time. The modeling in real-time is presented and methods are proposed to evaluate it using vehicle trajectories. Also comparative results are presented between the actual sensor data sets and simulated data to study the effectiveness of the system developed.
Study Of Seat-Belt Usage In Nevada & Driver's Performance, Atul Sancheti
Study Of Seat-Belt Usage In Nevada & Driver's Performance, Atul Sancheti
UNLV Theses, Dissertations, Professional Papers, and Capstones
According to the Centers for Disease Control (CDC), motor vehicle incidents has been reported to be the leading cause of the accidental deaths in the United States accounting for more than 42,000 deaths every year. Distracted driving and Driving under influence (DUI) are the major contributors to these roadway crashes. Moreover, drivers fatigue and drowsiness behind the wheel is another important factor contributing to the high fatality rate. These factors results in significant decline in the driver's abilities of perception, recognition and vehicle control.
It has also been reported by National Highway Traffic Safety Administration (NHTSA) estimated that about 292,471 …
Performance Comparison Of Design-Build And Construction Manager/General Contractor Highway Projects, Binita Shakya
Performance Comparison Of Design-Build And Construction Manager/General Contractor Highway Projects, Binita Shakya
UNLV Theses, Dissertations, Professional Papers, and Capstones
Researchers have conducted numerous studies comparing project performance of design-bid-build (DBB) and design-build (DB) highway projects. However, little research has been done to compare the performance of DB and construction manager/general contractor (CM/GC) highway projects. Therefore, an exploratory study was conducted to compare the performance of 55 DB and 34 CM/GC highway projects from various States Departments of Transportation (DOTs) in terms of cost, change orders, and construction intensity. The results showed that contract award cost growth was significantly lower in DB projects than in CM/GC projects. In contrast to this, the total cost growth of DB projects was higher …
An End To End V.M.T Framework With Controlled V.M.T Tax Rate Using Optimal Feedback Control Technique, Pratik Verma
An End To End V.M.T Framework With Controlled V.M.T Tax Rate Using Optimal Feedback Control Technique, Pratik Verma
UNLV Theses, Dissertations, Professional Papers, and Capstones
Vehicle Mile Travel (VMT) is a study related to available alternatives for the road
revenue collection system. As per the demand, the existing Gas/Fuel tax based revenue
collection system is not found an appropriate option in the longer run. Due
to existing system constraints like: no eective tax process for vehicles based on alternative
fuel (e.g. electric vehicles), no eective changes in tax due to economical
ination, and more highway expenditure than generated revenue, an alternative revenue
collection mechanism is required. Hence, the objective is to study an alternative
option in detail, which can address the gaps between required revenue …
Calibration Of Microscopic Traffic Flow Models Considering All Parameters Simultaneously, Victor Hugo Molano Paz
Calibration Of Microscopic Traffic Flow Models Considering All Parameters Simultaneously, Victor Hugo Molano Paz
UNLV Theses, Dissertations, Professional Papers, and Capstones
This study proposes a methodology to calibrate microscopic traffic flow simulation models. The proposed methodology has the capability to calibrate simultaneously all the calibration parameters as well as demand patterns for any network topology. These parameters include global and local parameters as well as driver behavior and vehicle performance parameters; all based on multiple performance measures, such as link counts and speeds. Demand patterns are included in the calibration framework in terms of turning volumes.
A Simultaneous Perturbation Stochastic Approximation (SPSA) algorithm is proposed to search for the vector of the model‟s parameters that minimizes the difference between actual and …
Investigation Of Crashes And Identifying The Best Practices For Setting Up Speed Zones In Towns Along Rural Highways In Nevada, Krishna Prasad Shrestha
Investigation Of Crashes And Identifying The Best Practices For Setting Up Speed Zones In Towns Along Rural Highways In Nevada, Krishna Prasad Shrestha
UNLV Theses, Dissertations, Professional Papers, and Capstones
In 2010, 51,664 crashes occurred in Nevada. Only about 9% of those crashes occurred in rural areas of the state. However, if only fatal crashes are considered, 41% of those fatal crashes occurred in rural areas. Generally, speed zones are provided in towns along rural highways to reduce speed-related crashes. However, a guideline is necessary for a consistent procedure to setup speed zones throughout the state. The main objectives of this study are to determine factors associated with crashes and to identify the best practices for setting up speed zones in towns along rural highways.
Eleven towns along rural highways …
Traffic Modeling In Lagrangian Coordinates Using Smartphone Apps, Sergio Contreras
Traffic Modeling In Lagrangian Coordinates Using Smartphone Apps, Sergio Contreras
UNLV Theses, Dissertations, Professional Papers, and Capstones
Traditionally, one of the ways traffic flow has been studied is by using the kinematic wave model. This model is derived in the Eulerian framework by using conservation of the number of vehicles. Recently, the kinematic wave model has been transformed into Lagrangian coordinates. In this framework, the independent variables are unique
vehicles and time. The detailed change in framework, and the properties of the model in the changed framework are reviewed. Numerical results from different traffic cases are explained. Since vehicle trajectory data can be easily collected from smartphones,
a smartphone application is developed for this purpose. This data …