I went to the Urban Track Project final conference in Prague because I am helping the Wiener Linien (Vienna’s public transport operator) on a research project intended to better understand the motivation for implementing good maintenance procedures. The conference presented results of the four year research project on how to design and build better urban rail (streetcars, metro, subway, etc.) track work. Several of the presentations were about how to design slab track to reduce noise and vibration.
Since I am more of a planner than engineer a couple of the less track-engineering presentations were more interesting for me. These were on: green track, rehabilitation processes and socio-economic impacts of rehabilitation projects.
Green Tram Tracks on Avenue Louise in Brussels (from my flickr photos)
The Green Tram Tracks, The Advantages of Implementing Vegetation Systems in Tram Tracks presentation was by Henrikje Schreiter from the Institute of Agricultural and Urban Ecological Projects (IASP) in Berlin. She described her phd dissertation on the benefits of using a specific plant species (Sedum, which is a succulent plant) for green tracks. In summary, there are a lot of benefits including water retention, reducing noise (small, but something), reducing airborne particles and just creating a nice visual environment. She discussed lots of the practical reasons why Sedum is a good choice (e.g no need for mowing) and how you actually build these systems (e.g. building them so that emergency vehicles can drive over them).
The IASP is holding a seminar on the subject of green tracks (German) – who knew that Berlin has been using green tracks since the early 1900s? – on 20 September 2010 (before the Innotrans Exhibition). The seminar is in German, but I may try to go and can do some translation of interesting presentations.
Westbahnstrasse Tram Track Rehabilitation, Vienna July 2009
Several speakers talked about rehabilitation of tram tracks. As visitors to my website know, tram track rehabilitation is a subject close to my heart! Speakers described a replacement project in Bremen where the tram service was only stopped for a weekend (although roadway traffic on the adjoining lanes was stopped for four weeks) for a traditional tram track replacement project, and one in Karlsruhe, where the city took about three weeks to install pre-fabricated track slabs in a historic district.
The contrast between the two projects was quite interesting. In Bremen the goal was to minimise service disruption and in Karlsruhe the goal was to install historic-looking track as efficiently as possible. In the project area Karlsruhe’s track is set in cobble stone pavement, so the prefabricated sections had a cobble stone surface. Also interesting was the fact that the work was done under the catenary lines – which made it difficult to manoeuvre cranes and lifting equipment. Both projects were partly funded by the Urban Track project and lots of practical lessons were learned.
The final presentation I will talk about was by Marjolein de Jong from Hasselt University in Belgium. The presentation was on evaluating the socio-economic impacts of tram track rehabilitation projects. What I found so interesting about her research was how systematically she identified the potential impacts and her findings regarding various potential staging strategies. When I talked to her later she said, well it’s just impact analysis 101, but I think it’s important because it starts to develop an organised framework for thinking about some of the problems planners face when considering rehabilitation programs.
More information about the project is available on the UrbanTrack project website.