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.
Results
Showing 1 to 15 of 15 for “"Transit Bus"”.
-
Optimization tool for transit bus fleet management
Transit agencies face the challenge of being environmentally-friendly, while maintaining cost-effective operation. Many studies have focused on investigating new bus technologies to reduce emissions and cost. However, they ignored the potential environmental and economic gain by improving the …
-
Marketing public transit : bus transportation in a small city
Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 1981.
-
A geospatial investigation of destination choice modelling. The case of the MYCITI integrated rapid transit bus system, Cape Town, South Africa
… for the case of the MyCiTi Integrated Rapid Transit system in Cape Town, South Africa.
-
Characterization, Speciation, and Source Apportionment of Particles inside and from the Exhaust of Public Transit Buses Fueled With Alternative Fuels
… of fine particles is carried out inside a public transit bus fueled with biodiesel (BD) and ultra low sulfur diesel (ULSD).</p><p>The three sorts of square surface patterns represented the morphological characteristics of single inhalable particles in the air inside the bus in Toledo. The size and …
-
Demand/supply equilibrium in designing bus route of small urban area
Mass transit bus systems can be characterized by two aspects, supply and demand. As in most systems, the supplier's objective is to minimize the system's total cost yet maximize its attractiveness to the users. The present study applied this concept to a bus system in small urban area by minimizing …
-
Hybrid electric vehicle regenerative-braking using ultracapacitors
… operating voltage from a hybrid electric vehicle transit bus; A control scheme is required to effectively control the charge and discharge of the ultracapacitor system. This system is required to provide for electric load leveling, effective control and maximization of the regenerative-braking …
-
Simulation of heavy-duty hybrid electric vehicles
… of vehicles. The cycles used are "Central Business District" cycle (CBD), "Urban Dynamometer Driving Schedule" cycle (UDDS), "Manhattan" cycle and "City Suburban Heavy Vehicle Cycle" (CSHVC). The vehicle considered for simulations was a transit bus, which is a series HEV. The series HEV is …
-
Modeling the impact of battery degradation within lifecycle cost based design optimization of heavy-duty hybrid electric vehicles
… problem is studied for a parallel HEV transit bus application. Results show that different optimal component sizes are obtained when different optimization objectives, such as net present value, payback period, internal rate of return, or simply the "day 1" fuel consumption, are …
-
Transitioning Transit : Modeling the Electrification of an Intracity Bus System
… transportation that merits attention is public transit. In many developing countries, public transit buses while being a popular mode of commute, are also hugely responsible for air pollution. This includes particulate matter pollution that poses very significant health risks. However, there are …
-
The effects of drive cycle accessory load and degree of hybridization on fuel economy and emissions for hybrid electric buses
… chosen as the simulation tool to model several bus powertrain configurations - conventional, three different degrees of hybridization parallel hybrid electric (PHEB), and a series hybrid electric (SHEB) to predict fuel economy and emissions level. The simulations were run with a typical …
-
A methodology for evaluating and reducing rotor losses, heating, and operational limitations of high-speed flywheel batteries
… and with specific regard to a metropolitan transit bus flywheel battery system developed by the University of Texas Center for Electromechanics. Methods are provided to reduce the contribution from each source and measured temperature data is provided to confirm the effectiveness of many of …
-
Modeling Size-Resolved Particle Number Emissions From Advanced Technology And Alternative Fueled Vehicles In Real-Operating Conditions
… contained particle number emissions from four transit buses, including two hybrid diesel-electric buses, under a variety of driving conditions and technological/fuel treatments including: diesel oxidation catalysts, diesel particle filters and ultra-low sulfur diesel fuel. A linear mixed model …
-
Three essays on the environment and health in cities
… and sustainability. In my first chapter, "Transit buses and fetal health: Evaluating the impacts of bus pollution policies in New York City," I provide the first estimates of the impacts of diesel vehicles on fetal health using quasi-experimental analysis. The U.S. Environmental Protection …
-
Modeling Diesel Bus Fuel Consumption and Dynamically Optimizing Bus Scheduling Efficiency
… very few models that estimate diesel and hybrid bus fuel consumption levels. Those that are available either require significant dynamometer data gathering to calibrate the model parameters and also produce a bang-bang control system (optimum control entails maximum throttle and braking input). …