INSTR2015 – 6th International Symposium on Transportation Network Reliability – the Value of Reliability, Robustness and Resilience, took place yesterday and today in Nara, Japan. First time that I take part in what seems to be a very relevant conference for my line of research concerning the reliability and vulnerability of public transport systems.

Here you can find my conference contributions concerning:

(1) Multi-crtieria evaluation of the resilience value of public transport investment plans based on a full-scan approach with the Stockholm public transport development plan as a case study (click for paper: instr2015_Cats_resilience_value)

(2) Investigating the role of exposure in public transport network vulnerability. A work that was preformed together with Menno Yap and Niels van Oort based on estimating large disruption data from the Netherlands and analyzing the impacts of accounting for exposure on the identification and evaluation of link criticality. (click for paper: instr2015_EXPOSURE). Below: Menno presenting on INSTR.

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(3) Analyzing the impact of partial (unlike complete) failures. Together with Erik Jenelius, we studied the relation between the extent of capacity reduction at the line level and its consequences on societal costs by performing a full network scan for the Stockholm network (click for paper: Beyond a complete failure INSTR) Below: Erik presenting on INSTR.

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Each of these studies deployed a distinctly different methodologies – network topology analysis (while accounting for travel impedance and demand), static assignment model and a dynamic agent-based transit assignment model, respectively.

Below: Still astonished by the Japanese public transport system!


MIT transit group seminar

On Thursday, November 20, I had the privilage to present highlights from my research to MIT transit group led by Prof. Nigel Wilson and thereafter had the opportunity to disucss ongoing research activities with group members.

The seminar was entitled: “Unraveling and modeling the dynamics of public transport systems: Theory and applications”, where I briefly presented the transit operations and assignment model, BusMezzo, and its applications to service reliability and control, congestion and evaluation of increased capacity as well as service disruptions and the value of real-time information provision.

For a reduced version of the presentation, click here: MIT seminar 20112014 v1



Experiencing public transport in China

Emerging economies and China in particular face tremendous challenges in transporting their rapidly growing urban populations. I am however very encouraged by what I have seen during this trip to Qingdao and Beijing. Not only that the existing system operates in very high standards in all respects (design, technology, information, crowd management, transfer facilities), but I have also learn that the Chinese government set very well-thought transport development objectives. One of the five national goals is to increase the modal share of public transport in major Chinese cities to 60% by 2020, indeed a novel and ambitious goal. However, significant resources and know-how knowledge will be needed in order to realize this goal. Congestion and capacity management in public transport systems, demand management strategies, transport policies and network resilience are among the most crucial issues that need to be tackled. I had the opportunity to give a lecture on “The role of public transport planning: Lessons from the European experience” in the national Transport Planning and Research Institute, Ministry of Transport, China. My exchange with the very competent staff at TPRI is an additional reason for optimism in how transport planners in China will shape their mega-cities in this critical point of their development.

In the photo:Qingdao Train station with the high-speed train to Beijing in the center (left) and a typical sight on Beijing metro system (right)

IMG_1612 (2)Qingdao (6) - Compressed