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Painting the sides of railroad rails white to reduce derailment

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Re: Painting the sides of railroad rails white to reduce derailment

#61
post #44

Earlier quoted context omitted.

Why would electrification prevent track from warping due to heat from the sun?

cuts down carbon footpriunt which in the long run ll help cut down temperatures

If we get to a point where direct sunshine all afternoon isn't hot, we're going to be in a big block of ice.

Re: Painting the sides of railroad rails white to reduce derailment

#62

This of course beeing the effect of seemlessly welded together rail with nowhere to go..

Indeed. Didn't they used to have expansion gaps?

They did. It's what caused the click-clack sound trains used to have, and the change to continuous welded rail is why there is no click-clack anymore.

Re: Painting the sides of railroad rails white to reduce derailment

#64

Earlier quoted context omitted.

You are misreading. Basically the white paint is "fighting the sun's heat".

But that's backwards. I took it to mean the rails or the engineers are no longer fighting (coping with) heat input from the sun because the rail never receives that heat when it's reflected away by the paint.

It means the paint is fighting the energy conversion potential encroaching on the steel, in place of the steel fighting it with no covering or shield

Re: Painting the sides of railroad rails white to reduce derailment

#65

I love a simple solution to billion dollar problems

...that will be done for a few years, dwindling quality and measurement, lack of continuous data collection, or sparse, which loses 'track' of performance and effect. Then, lots of subcontractors will use the wrong paint (maybe a black market appears), incorrect application, too thick too thin on top instead of the sides... more derailments start occuring because the whole program gets used to boost stock price and try to get fed contracts instead of actually engineering a solution and maintaining it as protocol.

Lots of major industrial specialty paint manufacturers and white labelers are publicly traded, owned by BR & VG.

Re: Painting the sides of railroad rails white to reduce derailment

#66
post #34

Earlier quoted context omitted.

Yes, they're called "high-rail" or "road-rail" vehicles. They have rail wheels that can be lowered down to drive on tracks or raised up for road use.

And sometimes the axel is short (narrow), so the tires are on the rail. It's funny to see them on a standard road.

They just use custom rims.

Re: Painting the sides of railroad rails white to reduce derailment

#68

Practical Engineering already explained the correct solution to this problem: https://youtu.be/zqmOSMAtadc?si=UUlmnk9sI-leq0SV But of course, American infrastructure was built on the cheap, and is not maintained correctly. This is why we can't have nice things.

> American [rail] was built on the cheap, and is not maintained correctly

edit: I'm not sure anymore; I know most of the network is well maintained, but there could be large sections that are not, I'm not up to date on it.

Re: Painting the sides of railroad rails white to reduce derailment

#69

Practical Engineering already explained the correct solution to this problem: https://youtu.be/zqmOSMAtadc?si=UUlmnk9sI-leq0SV But of course, American infrastructure was built on the cheap, and is not maintained correctly. This is why we can't have nice things.

> American [rail] was built on the cheap, and is not maintained correctly edit: I'm not sure anymore; I know most of the network is well maintained, but there could be large sections that are not, I'm not up to date on it.

It's certainly been doing better since the previous US administration put some cash in the infrastructure jar.

2025 Infrastructure Report Card | ASCE

  The 2025 grades range from a B in ports to a D in stormwater and transit. For the first time since 1998, no Report Card categories were rated D−. Among the 18 categories assessed, eight saw grade increases. 
~ https://infrastructurereportcard.org/

I dare say the next report card might not be so rosy.

Rail: B-

~ https://infrastructurereportcard.org/cat-item/rail-infrastru...

Re: Painting the sides of railroad rails white to reduce derailment

#70
post #49

Earlier quoted context omitted.

Or just have the cyclists use fatter tyres.

That would also require fatter wheels. Which together have higher moment of inertia which makes for slower bikes (as more energy is required to get the wheels to the same speed). Not exactly what people want in a race.

You can buy faster bikes than what is allowed at the Tour, so the only concern would be making records incomparable.
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