BNSF C44-9W 4615Floyd MO Floyd

Does this sign END TEST means, that in this area is brake check?

Good picture! I like it!

@classick - The test mile is only for distance, apparently, between 422 and 423, perhaps so they can time themselves traveling an exact mile. Not certain of that, however.
@Ilia.Obuhov.52 - Thank you! Fog is a useful effect, though that morning was very cold and diminished the feeling in my fingers!