London Underground tracks

[rebmcr]

Does anyone know the actual engineering reason that regularly-used deep-level tube tracks don't have a shiny, polished railhead?

Are they made from different materials or is it something in the environment (perhaps also responsible for the distinctive 'tube smell')?

 

[DavyCrocket]

The ones I've seen do! Perhaps it's the angle with artificial lights that give that impression.

 

[NSEFAN]

Dust deposits from the brakes? I've seen some stations where the platform ends have dust thick enough to write your name in!

 

[bronzeonion]

Err where don't they have a shiny polished head?

 

[Chris125]

Does anyone know the actual engineering reason that regularly-used deep-level tube tracks don't have a shiny, polished railhead?

Are you sure you're not getting the running rails confused with the conductor rails? Only the former will have the shiny polished effect produced by a steel wheel on steel rail.

Chris