Question

hola!
why does trains colours is blue?and not yellow or red​

Answer 1

Answer:

Before 1999, there were trains of red color, then new braking methods started to be installed. To distinguish in them, coaches with new brakes were painted blue.

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Answer 2

Explanation:

The exigencies of having to share coaches and split up rakes also means that it is quite common to find trains with coaches of varying paint schemes.

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