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Gravel. Aka, Roadbed.

Ballast is what they call it.

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Q: What is gravel under train tracks called?
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Related questions

What rocks are used on under train tracks?

Ballast


Do train tracks move when a train is on them?

If the ballast underneath the tracks have sunk then it will go up down up down under each locomotive.


What is the name of the gravel under the railroad ties?

The gravel under and around the ties is called ballast.


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Why do train tracks have stones under the rails?

these have small stones under them so that the rails will not bend, also when it rains these rails wont sink in the mud and the water will filter through them.


Can a human fit under a freight train while it is moving on the tracks?

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Why do you need to use invar steel for train tracks?

Invar steel is used for train tracks because it has a low coefficient of thermal expansion, meaning it does not expand or contract much with temperature changes. This helps to maintain the stability and alignment of the tracks under different weather conditions, reducing the risk of buckling or warping.


Are gravel filters for fish tanks the same as the regular gravel filters?

There are under the gravel filters, hang on filters and canister filters. There are also reactors that can be used for filtration. Under gravel filters are actually under the gravel in your tank and use a air pump to create suction to pull dirt and debris down into the gravel trapping it there. A gravel cleaner, sometimes referred to a gravel filter is generally a plastic tube attached to a length of hose that uses siphoning to draw dirt, debris and water out of tank into a drain or holding container to be disposed of.


What are the frameworks of braces under a road called?

When a road is constructed, 12 inch layers of gravel are laid and compacted until the road bed reaches the desired height. There are no braces other than a bed of compacted gravel.


What is the purpose of the two gravel layers under the topsoil in Mayan irrigation?

The gravel acts as a drain in wet areas.