Why can't we use the toilet when the train isn't moving in some countries?
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Can you use the bathroom when the train is stopped?
Passengers may be discouraged from flushing or using toilets while the train is at a station or standing at a red signal. To enforce this limitation, toilets may be automatically locked when the train pulls into a station or stops at a red signal.Do UK train toilets empty onto the tracks?
Sewage from train toilets continues to be emptied onto certain railway lines in the UK. Sewage from train toilets continues to be emptied onto certain railway lines in the UK, despite vows by authorities to stop this practice.Do trains in UK have toilets?
There are far more trains with toilets in the UK than there are without toilets. The routes you have mentioned all have trains with toilets, so you should be fine!Liz Phair - Why Can't I? (Official Video)
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Images: James Wheeler, Ketut Subiyanto, Ketut Subiyanto, Lucas Allmann