What does a "sad face with a bow tie" represent?
2nd symbol looks awfully like a hydraulic/pneumatic/water/other pipe control valve symbol, a few likely candidates or similar symbols can be seen here:

http://www.airlinehyd.com/webpages/information/Knowledge_Center/Symbols.aspx

http://www.plumbinghelp.ca/articles_plumbing_symbols_valves.php

1st one could be any sort of circuit breaker, switch, etc.

The problem here is that we don't know what the box is controlling, and institutions like rail, sea, air, power companies, telcos etc. will often have their own defined standards for things like this to suit for the specific nature of their systems, avoid ambiguity, and as a side-effect ensure that outsiders can't be 100% sure what the symbol means.

For all we know that could change the points on the track &amp; redirect the trains (mechanical), or it could empty the contents of the train toilet (plumbing), or any other system on a train.