The International Simutrans Forum

Community => Simutrans Help Center => Topic started by: Vonjo on February 16, 2013, 05:29:54 AM

Title: How to upgrade a bridge without demolishing it?
Post by: Vonjo on February 16, 2013, 05:29:54 AM
How to upgrade a bridge without demolishing it? :)
Title: Re: How to upgrade a bridge without demolishing it?
Post by: Sarlock on February 16, 2013, 05:51:35 AM
You have to bulldoze and rebuild...
Title: Re: How to upgrade a bridge without demolishing it?
Post by: Vonjo on February 16, 2013, 06:30:59 AM
Quote from: Vonjo on February 16, 2013, 05:29:54 AM
How to upgrade a bridge without demolishing it? :)
Quote from: Sarlock on February 16, 2013, 05:51:35 AM
You have to bulldoze and rebuild...
You don't answer the question.;D

But is there really no way to do that, or I just missing something?
---
(oh this is my 200th post ;D)
Title: Re: How to upgrade a bridge without demolishing it?
Post by: Sarlock on February 16, 2013, 06:35:24 AM
You can't upgrade it... you bulldoze and rebuild it :)
Title: Re: How to upgrade a bridge without demolishing it?
Post by: Vonjo on February 16, 2013, 06:39:03 AM
So it is an extension request then...  ;)
Title: Re: How to upgrade a bridge without demolishing it?
Post by: Sarlock on February 16, 2013, 06:48:34 AM
It's pretty quick to remove and build a new bridge, though... just a couple of clicks.
Title: Re: How to upgrade a bridge without demolishing it?
Post by: ӔO on February 16, 2013, 07:14:32 AM
If it is a low bridge, you can build an elevated way instead, which can be easily upgraded, assuming nothing changes underneath the bridge.
Title: Re: How to upgrade a bridge without demolishing it?
Post by: greenling on February 16, 2013, 07:53:47 AM
Hello Vonjo
you Want replace a bridge?
That i can help to find a solution for you problem need i some info's.
It the bridge that you want replace, very long?
Going the Bridge over a big area with water?
Lay the bridge in hills?
Have the Bridge a big Construction height over ground?
It the traffic over the bridge very high?
Gives around the Bridge free place?
Title: Re: How to upgrade a bridge without demolishing it?
Post by: Václav on February 16, 2013, 08:13:06 AM
Quote from: Vonjo on February 16, 2013, 06:39:03 AM
So it is an extension request then...  ;)
I am worried about that it would not be good. At least for this simple view: it is hard to rebuild some types of bridges on else type.

Also you would need other lines in dat of bridges. For example:
allow_upgrade
next_bridge
Title: Re: How to upgrade a bridge without demolishing it?
Post by: Ters on February 16, 2013, 08:19:40 AM
Why do you want to upgrade the bridge?

If it's speed only, then I can agree that it should be able to upgrade some types of bridges to higher speed rail while keeping the same bridge, just like electrification.

If the upgrade requires a different type of bridge, either to increase the weight limit or because wooden bridges aren't really up to TGV speeds, the realistic solution is to build a new bridge next to the old, and then demolish the old. Simutrans' instant construction means that it isn't necessarily disruptive to demolish the old bridge and then build the new in the same place. With the scales in Simutrans, this might be considered equal to building the new first then demolishing the old, just that next to each other is within the same tile.
Title: Re: How to upgrade a bridge without demolishing it?
Post by: ӔO on February 16, 2013, 09:28:19 AM
IMO, bridges and tunnels in simutrans could be handled better, but I assume that such a change would require an extensive code overhaul.

Like being able to resurface a bridge from road to light rail or vice versa would be nice.
Or being able to dig underneath existing ways without tunnelling would also be nice.
Title: Re: How to upgrade a bridge without demolishing it?
Post by: paco_m on February 16, 2013, 11:04:47 AM
This is like in the real world, if the traffic flow is so important that you can't interrupt it you have to build a temporary bridge beside it, destroy the bridge, buil the new one and finally take away the temporary bridge ;)
Title: Re: How to upgrade a bridge without demolishing it?
Post by: Fabio on February 16, 2013, 11:26:32 AM
To a certain extent I would like some kind of unification of bridges and elevated ways. Tunnels were overhauled, instead.
I would like bridges also acting like elevated when the needed graphics are provided.
Title: Re: How to upgrade a bridge without demolishing it?
Post by: greenling on February 16, 2013, 11:31:43 AM
Hello Fabio
Over your idea think i after.
Title: Re: How to upgrade a bridge without demolishing it?
Post by: The Hood on February 16, 2013, 12:02:05 PM
What I'd prefer - bridges are just the deck/structure and essentially create a new "ground" upon which you can then build a track. You could then easily replace one track for another on top of an existing bridge deck. You could even replace rail/narrow gauge/even road. The structure would have a cost and weight limit associated, as well as the track itself.
Title: Re: How to upgrade a bridge without demolishing it?
Post by: Vonjo on February 16, 2013, 01:45:54 PM
I was having a headache upgrading a hub station which was built on a bridge. If I just destroyed it, many passengers waiting at that on-a-bridge-station and at other station who want to go to that on-a-bridge-station, would be lost, because the station disappeared from the schedule. So I need to build a temporary station; move all the lines to the temporary station; rebuilt the bridge, station, catenary, and signs; and move the lines back.
Quote from: The Hood on February 16, 2013, 12:02:05 PM
What I'd prefer - bridges are just the deck/structure and essentially create a new "ground" upon which you can then build a track. You could then easily replace one track for another on top of an existing bridge deck. You could even replace rail/narrow gauge/even road. The structure would have a cost and weight limit associated, as well as the track itself.
Good idea. But it looks like it won't be easy to implement. It seems like it was discussed before.
Title: Re: How to upgrade a bridge without demolishing it?
Post by: Ters on February 16, 2013, 02:03:14 PM
That's the sort of headaches you get when running a transportation company. (Norway's main rail hub has been closed two or three summers now for upgrades to rail and signalling.) I think you can avoid most of the loss of passengers by putting the game in pause, but I'm not fully sure. It has worked for me with some lesser rebuilding. I also think passengers en route have become better at finding alternative routes relatively recently.
Title: Re: How to upgrade a bridge without demolishing it?
Post by: wlindley on February 16, 2013, 05:22:48 PM
You might try the Move-Station button, and move all vehicles that stop at the station in question, to a newly-built station tile that is not on the bridge.  That should prevent any lost passengers.
Title: Re: How to upgrade a bridge without demolishing it?
Post by: Ters on February 16, 2013, 05:56:34 PM
Quote from: wlindley on February 16, 2013, 05:22:48 PM
You might try the Move-Station button, and move all vehicles that stop at the station in question, to a newly-built station tile that is not on the bridge.  That should prevent any lost passengers.
Does that move all waypoint along the platform, or is it necessary to use the tool on all tiles, unless one knows which tile all waypoints are placed on? I've never dared try.
Title: Re: How to upgrade a bridge without demolishing it?
Post by: Fabio on February 16, 2013, 06:50:23 PM
You need to know which tile.

But I took the habit of placing the stop always on the last tile in the direction the train is moving (i.e. Where the engine stops), so I know I only need to move that one.
Once I requested to highlight the tiles when selecting this tool, but nobody worked on it since.
Title: Re: How to upgrade a bridge without demolishing it?
Post by: Ters on February 16, 2013, 07:04:21 PM
Quote from: Fabio on February 16, 2013, 06:50:23 PM
But I took the habit of placing the stop always on the last tile in the direction the train is moving (i.e. Where the engine stops), so I know I only need to move that one.

So do I, but stations tend to grow over time, and for stations with one platform in either direction, only one direction grows towards the rear of the train. I could try to remember to move waypoints then, but I keep forgetting.
Title: Re: How to upgrade a bridge without demolishing it?
Post by: ӔO on February 16, 2013, 09:52:23 PM
I try not to build stations on bridges so that I have an easier time upgrading them. If I must, I use elevated ways that are at least 2 tiles long, so that they can be easily upgraded
Title: Re: How to upgrade a bridge without demolishing it?
Post by: Ters on February 16, 2013, 10:29:29 PM
I think I only have one or two stations partially on a bridge. I never had to upgrade the bridges though, as they only limit the speed and trains have to slow down to stop anyway.
Title: Re: How to upgrade a bridge without demolishing it?
Post by: Vonjo on February 17, 2013, 12:28:20 PM
Quote from: wlindley on February 16, 2013, 05:22:48 PM
You might try the Move-Station button...
Yes I use that. It usually called 'replace stop' tool. It still have a problem Fabio mentioned above though, but there is a workaround for that.
Quote from: ӔO on February 16, 2013, 09:52:23 PM
...If I must, I use elevated ways...
Yes, I use elevated ways rather than bridge whenever possible. I love bridges and elevated ways.
Quote from: Ters on February 16, 2013, 02:03:14 PM
... (Norway's main rail hub has been closed two or three summers now for upgrades to rail and signalling.)...
Interesting :)
-----

But
If bridge upgrade is not a good idea, then it may also not be a good idea to upgrade elevated ways (and technically ways too), which is visually similar.
Title: Re: How to upgrade a bridge without demolishing it?
Post by: Ters on February 17, 2013, 01:36:00 PM
It's hard to draw a clear line between elevated ways and bridges, but elevated ways can be upgraded section by section, as each section/tile stands on it's own, while with bridges, one can't do anything less than entire spans.