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 45 for “"Heavy Vehicle"”.
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Front underride protection devices: design methodology for heavy vehicle crashworthiness
North American Heavy Vehicles contribute to a third of all road fatalities in Canada. Head on collisions are one of the most severe, as the mismatch of vehicle weight and sizing intensifies when a passenger vehicle is impacted. To improve crash safety, Front Underride Protection Devices (FUPDs) are …
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The influence of heavy vehicle dynamics on rigid pavement response
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1987.
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Large Force Range Mechanically Adjustable Dampers for Heavy Vehicle Applications
… principles have been developed for a variety of vehicles. These semi-active dampers have been designed to resolve the ride and handling compromise associated with conventional passive dampers, and increase vehicle stability. This thesis briefly reviews existing semi-active damper designs, …
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Design and validation of high speed active trailer steering system for articulated heavy vehicle
Articulated heavy duty vehicles are widely used around the world for its economic and environmental benefits. A-train double is one of the most popular heavy duty vehicles in Canada. Despite its advantages, the spread of A-train is hampered by poor lateral dynamic performance and poor accident …
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Assessment of Fracture Resistance of Asphalt Overlays through Heavy Vehicle Simulator and Laboratory Testing: Synthetic Fiber and Rubber Modified SMA Mixes
… (PCCP) conducted at the Virginia APT facility. A Heavy Vehicle Simulator (HVS) was used to compare the reflective cracking performance of a Stone Matrix Asphalt (SMA) control mix with a modified mix with a synthetic fiber. The discussion includes the characterization of the asphalt mixes, the …
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Shear Reliability Analysis of Reinforced Concrete Bridges Designed to TMH7
… modes of transport. This leads to increased heavy vehicle traffic and significant deterioration of road infrastructure. The Technical Manual for Highways 7 (TMH7) design code, published in 1981, is the code for the design of reinforced concrete bridges in South Africa. Its normal traffic load …
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Methodology for Development of Delay-Based Passenger Car Equivalents of Heavy Vehicles in Work Zones
The PCE of heavy vehicles in work zones are developed based on delay caused by the heavy vehicles since delay captures the effects of heavy vehicles better than other parameters. A mathematical model was developed to determine the bounds on the delays in work zones. The results of the model for …
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Lajes de pontes pelo método da ruptura
… slabs. We have studied only the effect of the heavy vehicle of six wheels. We have tested 5 models, being 3 separeted and just supported by the 4 sides, and 2 continuous slabs that have been previously dimensioned, according to the calculated results by numbers obtained by Prof. Polillo, …
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Development of a heavy-duty vehicle chassis dynamometer test route
A heavy duty vehicle chassis dynamometer driving route, titled "City-Suburban Heavy Vehicle Route" (CSHVR) was developed. Data for designing the CSHVR were collected using a Campbell Scientific 21x. Procedures were developed to reduce statistically the speed and time data into representative speed …
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Design and development of side underride protection devices (SUPD) for heavy vehicles
… large mismatch between the bumper of a passenger vehicle and the ground clearance of heavy vehicles. During collisions between the car and the side of the heavy vehicle, a large amount of intrusion is observed in the passenger compartment due to underride. The results of these collisions often …
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HEAVY TRUCK COLLISION WITH BRIDGE PIERS
… collision, both caused by vessels and vehicles, is the second leading cause of bridge failures after hydraulic. The current AASHTO-LRFD (2017) specification recommends designing a bridge pier vulnerable to vehicular impacts for an equivalent static force of 2,670-kN (600 kips) applied …
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Simulation of heavy-duty hybrid electric vehicles
Microsoft Excel and ADvanced VehIcle SimulatOR (ADVISOR) were used to simulate the driving conditions of heavy-duty hybrid electric vehicles over various driving cycles in an attempt to optimize their design and control. The fuel economy data thus obtained were compared with those of the in-use …
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Evaluation and Installation Guidelines for Advance Warning Signal Systems in Utah
… high crash rate, approach grade, and heavy vehicle traffic volume. The guidelines for the AWS system design included details about three components: AWS component, advance detection component, and signal timing component. An evaluation matrix was developed by the Policy Delphi method …
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Enhancement of Network Level Macrotexture Measurement Practices through Deterioration Modeling and Comparison of Measurement Devices for Integration into Pavement Management Systems
… when subjected to traffic loading using a heavy vehicle simulator to report the effect on pavement macrotexture. The second experiment compared high-speed macrotexture measurement devices on a variety of surfaces and under various operating conditions. The change in macrotexture due to …
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Identifying and modeling urban truck daily tour-chaining patterns
… activity data collected for the Urban Freight Heavy Vehicle Study ongoing in Singapore, which is an advancement in freight data collection studies. The data contain individual truck's Global Positioning System (GPS) traces and rich behavioral details including the activities at stops and …
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Parallel design optimization of multi-trailer articulated heavy vehicles with active safety systems
Multi-trailer articulated heavy vehicles (MTAHVs) exhibit unstable motion modes at high speeds, including jack-knifing, trailer swing, and roll-over. These unstable motion modes may lead to fatal accidents. On the other hand, these vehicle combinations have poor maneuverability at low speeds. Of …
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Effects of artificial neural network speed-based inputs on heavy-duty vehicle emissions prediction
… performed in Southern California on thirty-four heavy-duty diesel vehicles using the West Virginia University Transportable Heavy-Duty Vehicle Emissions Testing Laboratories to gather emissions data of these vehicles. The data obtained from six vehicles in the 1985--2001 model year and …
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Coordinated control of active safety systems for multi-trailer articulated heavy vehicles
… performance of multitrailer articulated heavy vehicles (MTAHVs), the model-based active safety systems, including the active trailer steering, trailer differential braking and the active roll control are developed. The active safety systems are integrated and coordinated for optimal …
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