In north America, freight locomotives have a toilet in the nose of the cab. This is a rather clean example of such. Why do Japanese train engineers point? Why do modern trains still need engineers?
In the absence of washrooms inside loco cabins and strict directives never to leave the engine unattended, a train's pilot, if he wishes to use the loo, has to send this message to the control room, which then makes arrangements for his replacement at the next major railway station.
While modern trains won't litter the tracks with human excrement, the traditional method did just that. This is what was known as a hopper toilet. It could either be a simple hole in the floor (also known as a drop chute toilet) or a full-flush system.
The traditional method of disposing human waste from trains is to deposit the waste onto the tracks or, more often, onto nearby ground, using what is known as a hopper toilet. This ranges from a hole in the floor to a full-flush system (possibly with sterilization).
Vacuum toiletVacuum systems used in the newest carriages are similar to those in airliners: waste is pulled into a holding tank with a high pressure pump.
Train drivers in the UK are able to take a 'personal needs break' and these breaks are often planned into their shifts. A passenger train driver will be able to use the toilets at a station, on the train, or at a railway depot.
So they err on the side of caution, and instruct you not to drink the water, because they can't guarantee that it's potable. Even if the water is great when it goes in, it sits around in an unrefrigerated tank that doesn't get a thorough cleaning every day. That alone is enough to disqualify it for drinking.
Neither the conductor nor the engineer is allowed to sleep on the train. They must be awake and alert throughout their entire shift. So, where do they sleep? After their shift, conductors and engineers sleep either at home or in a motel at an away terminal.
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What do freight train engineers (drivers) eat for lunch? Do they have to bring their own, or does the railroad figure out a way to feed them? Freight train engineers typically bring their own meals or purchase food at train stations or nearby convenience stores.
If you are on a train, local trains sometimes do not have toilets, although most trains do (but not Underground trains). All passengers have access to these, if you want to take the risk.
What happens if you flush a toilet's tank in an airplane while sitting on it? Absolutely nothing. Your arse might ache a bit afterwards. Stories about people being sucked through the toilet and flushed out the plane are urban legends.
When a toilet is flushed on a cruise ship, the sewage travels to the onboard treatment plant. Here the waste is filtered before it enters an aeration chamber. The aeration chamber cleans the waste. It is then sterilized using UV light and released into the ocean when clean enough to do so.