Welcome to the new version of European Tribune. It's just a new layout, so everything should work as before - please report bugs here.
Display:
fascinating.  Like caterpillars speed up.  They also look remarkably like cars at traffic lights.  I wonder if with computers we could actually reduce the interlocking time to realtime and avoid any of the stopping.  That would have a big impact on the efficiency.
by njh on Tue Jun 5th, 2012 at 02:06:05 PM EST
[ Parent ]
The stopped trains over to the right are probably empty and being cleaned, serviced and/or waiting out a time buffer before departure. You need time buffers, because without them delays cascade. Which means you need to have trains standing still and empty on a side track some of the time. If you don't have that, Bad Things happen to your ability to keep your schedule.

- Jake

If you only spend 20 minutes of the rest of your life on economics, go spend them here.

by JakeS (JangoSierra 'at' gmail 'dot' com) on Wed Jun 6th, 2012 at 04:37:56 AM EST
[ Parent ]
The stopped trains on the right do indeed look like depot runs, although they look like intermediate stops (it's 50x accelerated so most trains stop only for a few minutes, and continue rather than reverse towards the station).

OTOH I think in-service trains stopping just outside a terminal station is near-unavoidable: when a departing and an arriving train stop at the same platform or their paths cross, a delay for the train scheduled to pass the 'exclusion zone' can delay the other. (Still, when I was in Gare St. Lazare, which by number of calling trains is like the busiest commuter rail station in the world, I don't remember seeing a single example.)

*Lunatic*, n.
One whose delusions are out of fashion.

by DoDo on Wed Jun 6th, 2012 at 09:29:41 AM EST
[ Parent ]
I can confirm that the area on the right is a depot, used to prepare the trains to the St Lazare station.

The exact place is called "Pont Cardinet". There is a huge real estate project in the area, that would involve covering the tracks, but I don't really know the exact perimeter.

A free fox in a free henhouse!

by Xavier in Paris on Fri Jun 8th, 2012 at 09:03:04 AM EST
[ Parent ]
I think the characteristic interlocking time is in the seconds, while the time needed for trains to clear conflicting paths can be in the minutes. But when the path conflicts only concerns a crossing, reducing interlocking time would indeed help.

On the open line, of course a moving block system would help. (On commuter lines with a low number of train types, it is easier to implement, see the success of CBTC vs. the not even in pilot stage ETCS Level 3.)

*Lunatic*, n.
One whose delusions are out of fashion.

by DoDo on Wed Jun 6th, 2012 at 09:41:58 AM EST
[ Parent ]
I strongly suspect that this has already been worked out in mathematical detail and practical implementation by members of the MIT model railroad club. I've worked for a few of them in "real life" and the club seems to be a filter that selects for practical genius.

http://tmrc.mit.edu/

by asdf on Wed Jun 6th, 2012 at 01:46:07 PM EST
[ Parent ]

Display:

Top Diaries

Pentecost steam

by DoDo - May 20
16 comments

A Nomad's Life (A Farewell)

by Nomad - May 10
14 comments

Simple Solar Principles

by gmoke - May 17
2 comments

Rail News Blogging #24

by DoDo - May 12
11 comments

Ferguson hates on Keynes

by Migeru - May 6
100 comments

Occasional Series