Browse Topic: Light rail systems

Items (12)

Exploration of the Impact of Built Environment Factors on Morning and Evening Peak Ridership at Urban Rail Transit Stations: A Case Study of Changsha, China

13-06-02-0009

07/22/2024

To identify the influences of various built environment factors on ridership at urban rail transit stations, a case study was conducted on the Changsha Metro. First, spatial and temporal distributions of the station-level AM peak and PM peak boarding ridership are analyzed. The Moran’s I test indicates that both of them show significant spatial correlations. Then, the pedestrian catchment area of each metro station is delineated using the Thiessen polygon method with an 800-m radius. The built environment factors within each pedestrian catchment area, involving population and employment, land use, accessibility, and station attributes, are collected. Finally, the mixed geographically weighted regression models are constructed to quantitatively identify the effects of these built environment factors on the AM and PM peak ridership, respectively. The estimation results indicate that population density and employment density have significant but opposite influences on the AM and PM peak

Su, Meiling, Liu, Ling, Chen, Xiyang, Long, Rongxian, Liu, Chenhui

Data Dictionary for Advanced Traveler Information Systems (ATIS

J2353_201906 (Current)

06/11/2019

This SAE Recommended Practice provides a set of core data elements needed by information service providers for Advanced Traveler Information Systems (ATIS). The data dictionary herein provides the foundation for ATIS message sets for all stages of travel (pre-trip and en route), all types of travelers (drivers, passengers), all categories of information, and all platforms for delivery of information (in-vehicle, portable devices, kiosks, etc.). The elements of this document are the basis for the SAE ATIS Message Set Standard J2354 and are entered into the SAE Data Registry for ITS wide coordination

V2X Core Technical Committee

Metal Oxide Vertical Graphene Hybrid Supercapacitors

TBMG-2493807/01/2016

NASA has developed a novel hybrid supercapacitor system utilizing vertical graphene as an electrode material grown directly on collector metals using a plasma enhanced chemical vapor de - position. Supercapacitors are an alternative to batteries for energy storage, offering high power density and rapid charging time. Nanomaterials such as carbon nanotubes and graphene offer high surface area and porosity to construct the electrodes. Vertical graphene grown directly on a collector metal substrate enables construction of a supercapacitor. The key to the hybrid supercapacitor technology is the growth of vertical graphene directly onto an inexpensive metal substrate without the use of bulk graphene, catalysts, or binders, resulting in increased power density. Adding the metal oxide or electrically conducting polymer to the vertical graphene adds redox (reduction and oxidation) capacitance, thus increasing the overall performance of the device

Interior Noise Design of a Light Rail Vehicle Using Statistical Energy Analysis

2015-01-2300

06/15/2015

This paper addresses the NVH design of a light rail vehicle whose maximum allowable interior SPL levels at certain speeds are regulated and may vary between countries, states, and cities. The objective of this study was to predict sound pressure levels (SPL) at several interior locations across a wide range of frequencies and estimate if the current design configuration will meet the noise level limits. Statistical Energy Analysis (SEA) was used to predict interior SPL and to understand and rank the various noise contribution paths and give a better understanding of the physics of transmission and what types of design changes are most effective to reduce the overall interior SPL to meet targets. A typical light rail vehicle is composed of a frame-like structure covered by lightweight panels and with interior panels that are increasingly made from composites, sandwich, laminated, or honeycomb materials or extruded panels. These lightweight structures made from materials that have

Fiedler, Robert, Musser, Chadwyck, Cuchý, Petr

Decongesting Denver

AUTONOV06_05

11/01/2006

The road to safer and more efficient ground transportation in the Mile High City is being paved, in part, via a romance between highway and light rail. Cities and states around the country-not to mention the federal government-are experimenting with all manner of new technology and management practice to decongest stuffed-up highways. They include systems in which data from cameras and other sensors are processed in such a way that commuters can learn about a traffic tie-up to be avoided far up-route, or can enter a toll-way without stopping for a ticket. In some demonstrations, civil and automotive engineers have shown how vehicles and highways can engage in a two-way conversation about road conditions and other factors to improve situational awareness. In the furthest reaches of advanced technology, engineers have demonstrated how a properly equipped highway can even “drive” a car with no help from the person behind the wheel. Such technologies generically constitute what is referred

Ponticel, Patrick

A Light Rail Metro for the City of Edinburgh

2002-01-225007/09/2002

Edinburgh is one of the fastest growing and most prosperous cities in the United Kingdom. This success has brought with it the problems of traffic congestion and pollution. The Edinburgh Metro would use the city's disused railway heritage combined with modern light rail technology to provide a popular and sustainable transport system. When this proposal was originally submitted in 1999, it seemed a worthwhile but distant possibility. However, in October 2001 and March 2002, the Scottish Executive announced preliminary funding packages that mean that significant progress is now likely. The planned system could be operating by 2009

Low, David J.

The ULTra Personal Rapid Transit System

2002-01-017403/04/2002

The ULTra (Urban Light Transport) PRT system offers an alternative to the automobile. It is a new form of public transport which, in contrast to all other types, is available on demand, and goes non-stop to any station on its own guideway network. ULTra also offers massive gains in energy, emissions and resource usage compared to all existing forms of transport, both private and public. ULTra can thus bring improved quality of life for both the user and the non-user of the system. A variety of studies have shown that the system can be implemented at a capital cost which approaches one third of conventional light rail. Studies suggest that the whole cost of mature systems can be recovered from the fare box. The prototype ULTra system is now undergoing test on a 1 km track in Cardiff Wales, where it is projected that the first passenger carrying system can come into service in 2004

Lowson, Martin

Affordable and Sustainable Urban Public Transport

2001-01-329910/01/2001

The goal of any transport system is to provide us all with increased personal freedom and mobility. The car has played a significant role in helping to achieve this goal. However, in urban areas the car alone is not a sustainable option. Increased car use has resulted in congestion, pollution and an increase in death and injury. In urban areas an efficient and popular public transport system is essential. Rail based systems have a particularly important role to play in larger urban areas. Numerous cities have identified rail based public transport systems as providing the ideal solution to their transport problems. However, in many cases, the enormous capital costs of such systems have proved an insurmountable barrier. In this paper we suggest how these capital costs could be significantly reduced by moving the power source onto the vehicle. The resulting reduction in infrastructure costs could allow many more cities to construct the rail based public transport systems they desire, and

Low, David J.

Data Dictionary for Advanced Traveler Information Systems (ATIS

J2353_199910 (Historical)

10/19/1999

V2X Core Technical Committee

The U.S. Standard Light Rail Vehicle-A Progress Report

77068002/01/1977

The U.S. Standard Light Rail Vehicle was designed by Boeing Vertol Company to replace the aging streetcars in several U.S. cities, and to provide an efficient vehicle for new light rail transit systems. The paper briefly describes the technical and design features of the LRV. It also describes the test program that was part of the development effort. The paper discusses test results achieved in testing and compares them with specification requirements. The paper discusses problems encountered during the test and development program. Finally the paper describes the initial introduction of the LRV into revenue service in Boston

Cord, John M., Norton, Peter R.

The New United States Standard Light Rail Vehicle

74022702/01/1974

This paper presents details of the new United States standard light rail vehicle (LRV) being built by the Boeing Vertol Co. for the Boston and San Francisco public transportation authorities. System operation, design features, and performance are described for the LRV, successor to the ubiquitous President's Conference Committee car, last built in the United States in 1951. Used most effectively for an intermediate mass transit volume of 8000-24,000 passengers/h, the Boeing LRV incorporates much of the available state-of-the-art technology

Lenow, Martin

AUTOMOTIVE RAIL-CARS AND FUTURE DEVELOPMENT

220053

01/01/1922

The many improvements effected in gasoline-engine construction during the war for airplane, heavy truck, tractor and tank usage have done much toward making the gasoline-driven rail motor-car a practical possibility today. The gasoline-electric cars built by the General Electric Co. are mentioned and light rail motor-car construction is discussed in general terms. Reliability and low maintenance cost are commented upon briefly, and the requirements of service for rail motor-cars are outlined

PLANT, L G

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