Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 48 for “"speed limits"”.
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Optimal control and speed limits of two-qubit quantum gates
The speed of elementary quantum gates, especially two-qubit gates, sets a fundamental limit on how fast a quantum computer can run. For current quantum computers that are subject to noise and errors, the speed of quantum gates is even more important as qubits have finite coherence times, and faster …
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Speed limits and red flags: why number agreement accidents happen
… of accuracy but disconfirmed with measures of speed, and vice-versa. In work on grammatical agreement in particular, there are accounts of variability in verb number production that emphasize the roles of lexical sources of number information and accounts that emphasize structural sources. …
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Evaluation of the feasibility of posting reduced speed limits on Kansas gravel roads
… Most of the gravel roads are not posted with speed limit signs but regulated with a 55 mph blanket speed limit established by the Kansas Statutes. Surface conditions of gravel roads are very likely to change with time, space, and quality of maintenance work, making it even more necessary to …
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Modeling Microscopic Driver Behavior under Variable Speed Limits: A Driving Simulator and Integrated MATLAB-VISSIM Study
Variable speed limits (VSL) are dynamic traffic management systems designed to increase the efficiency and safety of highways. While the macroscopic performance of VSL systems is well explored in the existing literature, there is a need to further understand the microscopic behavior of vehicles …
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Evaluating Ramp Metering And Variable Speed Limits To Reduce Crash Potential On Congested Freeways Using Micro-simulation
… of risk of crashes. Ramp Metering and Variable Speed Limits are two approaches which have the potential of becoming effective implementation strategies for improving the safety conditions on congested freeways. This research evaluates both these strategies in different configurations and …
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Developing an alternative means of assessing speed limits on rural single carriageway roads in Ireland using observed driver behaviour.
Speed limits in Ireland have undergone many changes since first introduced, most notably in 2005 when the State adopted metric speed limits. The challenge presented to the Department of Transport, Tourism and Sport and Local Authorities is to assess, manage and implement a system of speed limits …
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Optimal speed limit for shared-use roadways
… costs, it is necessary to determine optimal speed limits on roadways because of the strong relationship among posted speed limit, crash frequency, and crash injury severity. A comprehensive literature review about the relationship among posted speed limit, crash frequency, and crash injury …
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Traffic Conflict Analysis Under Fog Conditions Using Computer Simulation
… Among these factors, the traffic volume and the speed limits in poor visibility areas are the primary reasons that can affect the types and occurring locations of road accidents. In this thesis, microscopic traffic simulation, through the use of VISSIM software, was used to study the road safety …
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Effects of Road Characteristics, Land Cover, and Topography on Roadkill Patterns Across a Rural-Urban Gradient in Southwest Virginia
… routes, including roads with variable speed limits, road infrastructure, and adjacent land cover. I used government-provided data sets, satellite imagery, and field verification to characterize our study routes. I recorded 294 carcasses and identified 221, of which 84% were small or …
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Detection and Recognition of U.S. Speed Signs from Grayscale Images for Intelligent Vehicles
… that automatically detects and recognizes U.S. speed signs, from the grayscale images captured by a camera mounted on the interior mirror of a vehicle, as a part of designing smarter vehicles. The system operates in real-time within the computational limits of contemporary embedded general …
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Advanced Speed Control Strategies to Reduce Delay and Improve Safety of Car-Truck Mixed Traffic Flow
This study develops an advanced speed control strategy called “differential variable speed limit (DVSL)”. DVSL assigns different speed limits for car and truck, and it also varies speed limits based on traffic conditions. The study tested the impacts of DVSL on delay and safety for a section of the …
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MANY-BODY ENTANGLEMENT DYNAMICS AND COMPUTATION IN QUANTUM SYSTEMS WITH POWER-LAW INTERACTIONS
… which may lead to faster computational speeds. The questions of the nature of the speed-ups they can achieve—as well as how to program these long-range systems to achieve such speed-ups—are, therefore, of prime theoretical interest. To understand the nature of the speed-ups achievable, …
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Radiofrequency detector coil performance maps for parallel MRI applications
… acceleration of MR imaging beyond traditional speed limits. In parallel MRI, arrays of radiofrequency (RF) detector coil arrays are used to perform some degree of spatial encoding which complements traditional encoding using magnetic field gradients. As the acceleration factor increases, coil …
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Computer model to simulate truck accidents on exit ramps
… sufficient for heavy trucks traveling at higher speeds to reduce their speeds to the safe speed limits on the ramps. The posted speed limits may not be suitable for heavy trucks especially when the surface is not dry. The model also indicated that the tractor-semitrailers are more exposed to …
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Fatal Crashes Caused By Light Trucks Relative To Cars: A Test Of The Offsetting Behavior Hypothesis
… conclusions regarding the effects of increased speed limits on the behavior of drivers.
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A high-speed hysteresis motor spindle for machining applications
… drive technologies for use in a new high-speed machining spindle was performed to determine critical research areas. The focus is on a hysteresis motor topology using a solid, inherently-balanced D2 steel shaft. An analytical model of the motor is devised in order to make performance …
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Data-Driven Optimization of Automated Speed Enforcement Logistics
… Among municipalities’ priorities is to enforce speed limits to reduce speeding-induced traffic fatalities, constituting 27 % of all traffic fatalities in Canada. An emerging strategy toward this goal is the deployment of , which detects violators through speed cameras positioned alongside …
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Assessment of the Effects of Road Geometry on Irish Accident Rates and Driving Behaviour
… types that combine sharp bends with higher road speed limits. Results from driver eye behaviour analysis show drivers fixating on regions of the road based on visible geometry or available sight distance. For example, drivers fixate on areas at the road bend while negotiating sharp bends and …
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Human Factors Evaluation of an In-Vehicle Active Traffic and Demand Management (ATDM) System
… from the in-vehicle device (IVD): 1) dynamic speed limits, 2) dynamic lane use/shoulder control, 3) High Occupancy Vehicle (HOV) restrictions, and 4) variable message signs (VMS). This system was equipped with auditory and visual alerts to notify the driver when relevant information was …
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Spatial Analysis of Fatal Automobile Crashes in Kentucky
… analyses revealed that travel on roads with high speed limits and winding topography led to the highest number of crashes and highest rate of fatal crashesper 1,000 daily vehicles. Planar kernel density estimation results showed temporalpatterns, revealing that ‘hot spots’ and fatalities were …
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