Urban Transit Systems and Technology

Vuchic, Vukan R

doi:10.1002/9780470168066

Cited by 411 publications

(324 citation statements)

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“…This consideration of different occupancies between vehicles is important because it recognizes that some modes carry more passengers than others. The importance of considering passengers rather than vehicles was earlier mentioned by Vuchic (2007). He criticized street-scale evaluations based only on vehicle flows, because multimodal systems should integrate the occupancies of each mode.…”

Section: Introductionmentioning

confidence: 99%

On the distribution of urban road space for multimodal congested networks

Zheng

Geroliminis

2013

Transportation Research Part B: Methodological

121

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a b s t r a c tTransport systems in real cities are complex with many modes of transport sharing and competing for limited road space. This work intends to understand how space distributions for modes and interactions among modes affect network traffic performance. While the connection between performance of transport systems and general land allocation is the subject of extensive research, space allocation for interacting modes of transport is an open research question. Quantifying the impact of road space distribution on the performance of a congested multimodal transport system with a dynamic aggregated model remains a challenge. In this paper, a multimodal macroscopic fundamental diagram (MFD) is developed to represent the traffic dynamics of a multimodal transport system. Optimization is performed with the objective of minimizing the total passenger hours traveled (PHT) to serve the total demand by redistributing road space among modes. Pricing strategies are also investigated to provide a higher demand shift to more efficient modes. We find by an application to a bi-modal two-region city that (i) the proposed model captures the operational characteristics of each mode, and (ii) optimal dynamic space distribution strategies can be developed. In practice, the approach can serve as a physical dynamic model to inform space distribution strategies for policy makers with different goals of mobility.

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Section: Introductionmentioning

confidence: 99%

On the distribution of urban road space for multimodal congested networks

Zheng

Geroliminis

2013

Transportation Research Part B: Methodological

121

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“…Walking and horseback, electric railways, and automobiles all lead to distinct urban forms built to accommodate that mode (see Figure 1) (Vuchic, 2007). In many cities, elements of all of these forms are present, conveying the city's history like tree rings.…”

Section: List Of Tablesmentioning

confidence: 99%

Transportation Planning

2014

CIRP Encyclopedia of Production Engineering

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“…Although guideline figures for the safe limits of longitudinal accelerations in railway vehicles are used when specifying rolling stock, the source of the values is often unclear and can vary significantly [5,20,29]. Table 1 provides some examples from main line and light rail vehicles in Great Britain, from data provided by vehicle manufacturers/operators.…”

Section: Current Practicementioning

confidence: 99%

Passenger Stability Within Moving Railway Vehicles: Limits on Maximum Longitudinal Acceleration

Powell

Palacín

2015

Urban Rail Transit

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Increasing the acceleration and deceleration of trains within a railway network can improve the performance of the system. However, the risk of passengers losing their balance and falling is also increased. The purpose of this paper is therefore to examine the effect of longitudinal vehicle accelerations on passenger safety and comfort. The literature review brings together two separate disciplinary areas, considering the effects of acceleration on balance from a physiological/kinesiological perspective, as well as looking at the results of previous empirical studies on the levels of acceleration that railway passengers will tolerate. The paper also describes an experiment carried out on the Tyne and Wear Metro, which gathered data on typical acceleration levels to compare against the findings of the literature review. It was found that both the magnitude of the accelerations and their rate of change (jerk) are important. The results also suggest that there may be scope to improve the trade-off between journey times, energy consumption and passenger comfort by fine control of the acceleration/jerk profile. This is particularly relevant to urban rail systems, as they typically feature relatively high acceleration and deceleration. However, the findings for passenger comfort are equally applicable to conventional regional and intercity services.

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Urban Transit Systems and Technology

Cited by 411 publications

References 0 publications

On the distribution of urban road space for multimodal congested networks

On the distribution of urban road space for multimodal congested networks

Transportation Planning

Passenger Stability Within Moving Railway Vehicles: Limits on Maximum Longitudinal Acceleration

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