Stephen Rees's blog

Thoughts about the relationships between transport and the urban area it serves

Batteries included: Network Rail begins on-track trials of prototype battery-powered train

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‘What’s this got to do with transit in Metro Vancouver?’ you might be asking. Well, it’s a trial of a new technology that does actually have potential impact here.

Network Rail and its partners believe battery-powered trains could be used to bridge gaps in otherwise electrified parts of the network or be used on branch lines where it would not be cost effective to install overhead electrification equipment,

You can read the entire press release, if you are interested. A couple of important bits of information are missing: the weight of batteries and what they do to the power consumption of the train when it is running under the wires. The second bit there is probably one of the key determinants of whether this project goes on to production. There are many prototype tests: many of them have short lives or look very different by the time they get into production.

The technology is the interesting bit, because it does not necessarily need to be confined to trains. Vancouver has an extensive network of electric trolleybuses, but the wires do not always extend to useful destinations. It is very expensive to construct the overhead (back in 2004 I used to use the figure of $1m per kilometre for plain track – more for “special works” like switches and diamonds). So to add enough wire to get trolleybuses from say 41st at Crown to UBC is cost prohibitive.

The “new” trolleybuses – actually entering service at the end of 2006 – have much better batteries than the previous generation, but even so can only run at low speed and limited distances. And someone has to be stationed at each end of the gap to do the pole pulling. So battery power is for short distances and for temporary disruptions. Routes like the #7 Dunbar – Nanaimo have been running diesel buses under wires most of the way for at least a year by my observation. This new technology could see faster, longer operation on battery power for longer distances. This would both reduce the use of diesel – a worthy aim in itself – and cut costs. As long as someone comes up with a automated pole puller. Routes like the #9 could actually terminate somewhere useful, like Brentwood Mall, instead of the traditional loop at the city boundary. The #41 could run out to UBC electrically and use the wires for most of the route.

This is probably more likely than seeing CMBC put poles on hybrid buses to achieve the same objectives.

Translink 2135 on wb 9 Broadway Vancouver BC 2007_0108

In other news

The draconian changes in drunk driving rules in BC have worked to reduce collisions and casualties. No mention is made of why this change in legislation was controversial in this UBC study, so it does not come across as an evenhanded or even objective assessment of the policy change. Were the fears of the restaurant/pub operators justified? Are there any civil liberties concerns about the presumption of innocence lost at the “sobriety checkpoint” or the absence of due process when the police impose penalties without judicial oversight? Or is the unspoken rule any life saved is worth any cost?

Written by Stephen Rees

August 15, 2014 at 9:42 am

One Response

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  1. We have trolley busses that have a small motor to cross gaps in the system: they used them a lot when we had a complete rebuild of the local bus station last year. We used to have busses with a bigger motor which went to the end of the wires and then into the next town but it seems they were considered too expensive to replace.
    It will be interesting to see how the NR trials go, I suppose that like Eurostar they will be able to drop their pantographs at speed and save energy that way.
    My only concern is that this could become a way to avoid electrification, leading in turn to freights having diesel power under wires for most of their journey so they don’t need to change locomotives for a short section of track.

    Andy in Germany

    August 15, 2014 at 12:06 pm


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