[SystemSafety] Passengers travelling through London Paddington are facing continued disruption after a train derailment.

Dick Selwood dick at ntcom.co.uk
Fri Jun 17 16:59:03 CEST 2016


But why did the derailed vehicle hit the overhead support?  this seems 
to be a bad idea.


On 17/06/2016 15:26, DREW Rae wrote:
>
> Martyn,
> The train was coming from a siding. Derails are used to protect main 
> lines (where the passenger trains run) from unauthorized entry. 
> Unauthorized movements don't necessarily have locomotives, let alone 
> ATP enabled - for example they may be runaway cars.
>
> They're fairly basic mechanical devices - almost like spring loaded 
> levers to force the wheels off the track. The assumption is that 
> whatever you are derailing isn't nearly as valuable as a mainline train.
>
> Drew
>
> On 18 Jun 2016 12:07 AM, "Martyn Thomas" 
> <martyn at thomas-associates.co.uk 
> <mailto:martyn at thomas-associates.co.uk>> wrote:
>
>     Passengers travelling through London Paddington are facing
>     continued disruption after a train derailment.
>
>     Network Rail said the empty train had passed a red signal outside
>     the station, activating an automatic derailment on Thursday.
>     Overhead power lines also came down.
>
>     http://www.bbc.co.uk/news/uk-england-london-36555082 (includes a
>     picture that explains why the overhead power was brought down).
>
>     How does the "automatic derailment" work? Is it really the best
>     solution for a train passing a signal at danger? Surely this can't
>     be used if the train is carrying passengers! Why isn't Automatic
>     Train Protection adequate?
>
>     Martyn
>
>
>     _______________________________________________
>     The System Safety Mailing List
>     systemsafety at TechFak.Uni-Bielefeld.DE
>     <mailto:systemsafety at TechFak.Uni-Bielefeld.DE>
>
>
>
> _______________________________________________
> The System Safety Mailing List
> systemsafety at TechFak.Uni-Bielefeld.DE
>
>
> No virus found in this message.
> Checked by AVG - www.avg.com <http://www.avg.com>
> Version: 2016.0.7640 / Virus Database: 4604/12435 - Release Date: 06/16/16
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.techfak.uni-bielefeld.de/mailman/private/systemsafety/attachments/20160617/1924d81e/attachment.html>


More information about the systemsafety mailing list