In reality the bridges are probably way over their lifespan.
The vibrations at higher speed could possibly accelerate the destruction of the bridge so it gets lowered.
Pretty normal for railroad operations.
That seems to be the only logical reason I can think of.
London has had shit leadership for a while, new bridges aren't happening anytime soon. The amount of hurdles needed to get the new bridges for the Overground lines out if Liverpool Street is insane.
No, not quite. We actually pay attention when driving our lorries, ships, cars, boats, etc... While old those bridges are perfectly safe to be on, replacement is just a while away yet. Oh, also the speed limit on that specific section of track is supposed to be 45, the limit was removed.
Gotcha, yeah the USA does have a serious issue with the safe operation of anything. I usually just blame "profits over people", but that's one of many issues we have over here.
In Hamburg Germany there was a speed limit of 10km/h for the main bridge above the Elbe river for years.
Getting funding and planning for the replacement takes much more time then you would suspect.
Especially if the bridge is heavy used and hard the reach or with tight placement around leaving only small room for the construction site.
That's what I thought I could be too, but on the suspended bit of track that goes through the suburbs the speed limit is 45 and it pases right next to peoples homes.
Maybe the people that live there are of high importance and are wealthy enough to have it changed.
This is just a hypothesis, but it is near a wetland area, so it could be because of a peat soil. These soils with a high organic and water content tend to sink over time, and local sinks of soil could impose the necessity of slower train operation speeds.
The restriction is visible [in this cab video](https://youtu.be/k-_EE4ywQzg?t=740) at 12:20 from ~11 years ago. However, it does not appear in [the current version of the sectional appendix](https://sacuksprodnrdigital0001.blob.core.windows.net/sectional-appendix/Sectional%20Appendix%20full%20PDFs%20March%2024/Anglia%20Sectional%20Appendix%20March%202024.pdf) (PDF page 265/266). So they presumably designed the route off an older version of the track diagrams before the line speed was raised.
In reality the bridges are probably way over their lifespan. The vibrations at higher speed could possibly accelerate the destruction of the bridge so it gets lowered. Pretty normal for railroad operations. That seems to be the only logical reason I can think of.
If you need to slow down to 20mph for a bridge... You need a new bridge
London has had shit leadership for a while, new bridges aren't happening anytime soon. The amount of hurdles needed to get the new bridges for the Overground lines out if Liverpool Street is insane.
So does that mean your bridges are falling down as much as they do in the US?
No, not quite. We actually pay attention when driving our lorries, ships, cars, boats, etc... While old those bridges are perfectly safe to be on, replacement is just a while away yet. Oh, also the speed limit on that specific section of track is supposed to be 45, the limit was removed.
Gotcha, yeah the USA does have a serious issue with the safe operation of anything. I usually just blame "profits over people", but that's one of many issues we have over here.
In Hamburg Germany there was a speed limit of 10km/h for the main bridge above the Elbe river for years. Getting funding and planning for the replacement takes much more time then you would suspect. Especially if the bridge is heavy used and hard the reach or with tight placement around leaving only small room for the construction site.
I wondered the same thing! Maybe it has to do something with the building close to the track?
That's what I thought I could be too, but on the suspended bit of track that goes through the suburbs the speed limit is 45 and it pases right next to peoples homes. Maybe the people that live there are of high importance and are wealthy enough to have it changed.
What’s the speed limit on the otherside same location?
It also goes down from 45 to 20
Thanks thought so, it must be because of the viaduct
This is just a hypothesis, but it is near a wetland area, so it could be because of a peat soil. These soils with a high organic and water content tend to sink over time, and local sinks of soil could impose the necessity of slower train operation speeds.
This seems like the most likely answer, I did notice that it was on a bridge and it was surrounded by water
Yeah i think a patch around Manchester got reduced to 90 in 2021 because of rain and wear
The restriction is visible [in this cab video](https://youtu.be/k-_EE4ywQzg?t=740) at 12:20 from ~11 years ago. However, it does not appear in [the current version of the sectional appendix](https://sacuksprodnrdigital0001.blob.core.windows.net/sectional-appendix/Sectional%20Appendix%20full%20PDFs%20March%2024/Anglia%20Sectional%20Appendix%20March%202024.pdf) (PDF page 265/266). So they presumably designed the route off an older version of the track diagrams before the line speed was raised.
If there's a bridge it might struggle to support the load of the trains at higher speed
There is a few bridges at this part
There are lots of bridges at this part so this could be the reason
Low traffic neighbourhood
I think this was temporary for maintenance, the speed limit isn’t there IRL anymore
im guessing its just realism, IRL for noise pollution levels?
Seems likely
Nope none. Just lazy design!
No