Showing papers on "Intelligent transportation system published in 1975"
TL;DR: A dynamical model to describe the concentration of vehicles in the different network sections is derived and used to study the transient behavior of flows and concentrations in a simulation of a specific closed two-way PRT network.
2 citations
01 Jan 1975
TL;DR: In this article, the authors present the results from an experimental study which provided human factors data on passenger behaviour in relation to certain aspects of vehicle design and station layout on an urban rapid transit system.
Abstract: This report presents the results from an experimental study which provided human factors data on passenger behaviour in relation to certain aspects of vehicle design and station layout on an urban rapid transit system. An extensive series of tests was carried out using full scale mock-up vehicle and platforms to study, inter alia, the effects on vehicle dwell time of: 1 vehicle size; 2 vehicle door size and using separate doors for entry and exit; 3 the number of people in the vehicle, on the platform and inter-changing between the two; 4 overloading the vehicle with passengers; 5 platform size and layout, including the provision of barriers. The tests were mainly carried out using a static vehicle but in some cases the vehicle was moved in and out of the station to determine the effect of vehicle movement, particularly deceleration, on passenger behaviour at the station. The rapid transit system under study will serve as great a proportion as possible of the urban community; the handicapped persons and those inconvenienced with luggage or pushchairs have been given special considerations in the experimental trials. The report also discusses the implication for passenger behaviour, and hence system performance, of choosing certain vehicle and station design features. (A) /TRRL/
1 citations
01 Dec 1975
TL;DR: In this paper, the main components of two alternative flow-coordinated strategies upon which an overall vehicle management problem might be based, are outlined, which are potentially applicable to large, topologically complicated systems operated at high vehicle density levels.
Abstract: The main components of two alternative flow-coordinated strategies upon which an overall vehicle management problem might be based, are outlined. A fundamentally new approach to the vehicle management problem is presented which takes into account station capacity constraints and which is potentially applicable to large, topologically complicated systems operated at high vehicle density levels.
1 citations
Proceedings Article•
01 Jan 1975
TL;DR: In this paper, the design of point-and vehicle-follower vehicle longitudinal control systems is reviewed in the context of recent domestic and European system developments, and some of the fundamental considerations in the design are discussed.
Abstract: The designer of an automated guideway transit sytem may select a number of different approaches to vehicle longitudinal control. These approaches may be broadly classified into point-follower and vehicle-follower divisions. Control in the former case reduces to the problem of tracking a deterministically generated point while vehicle-follower control involves manipulation of vehicle position and velocity relative to other vehicles in the immediate vicinity. The selected policy has implications on the performance and hardware configuration of the vehicle longitudinal control system. This paper reviews some of the fundamental considerations in the design of point- and vehicle-follower vehicle longitudinal control systems in the context of recent domestic and European system developments.
1 citations
TL;DR: The analysis, based upon detailed computer simulations of urban transportation systems, indicates some major changes in costs and benefits for different demand conditions, but the relative standing of new systems of urban Transportation were not significantly affected.
Abstract: The sensitivity of cost-benefit assessments to variations in demand for public transportation is examined. The analysis, based upon detailed computer simulations of urban transportation systems, indicates some major changes in costs and benefits for different demand conditions. However, the relative standing of new systems of urban transportation were not significantly affected. Also discussed are requirements for improved modeling of demand.
TL;DR: In this paper, the main line trains have a peak volume, depending upon operating speed which is an order of magnitude greater than existing modes, and passengers are shuttled to and from these fixed speed trains by means of shuttle cars.
Abstract: SUMMARY The dynamic shuttle system treated in this paper consists of main line trains traveling at a fixed speed. Passengers are shuttled to and from these fixed speed trains by means of shuttle cars. The shuttle cars can provide local service and thus alleviating the need for stations along the route of the main line trains. The main line trains have a peak volume, depending upon operating speed which is an order of magnitude greater than existing modes. They provide high speed service to travelers in the belt traversed by the trains.