We arrived in Bangkok several days ago and went on a 40 minute  bus ride out of town to see a train market. They set up their goods (mostly fruit, veggies, and meat/fish) right beside and on the train tracks at sunrise.  People walk along the tracks to buy their things.  But  everyday the train comes at 9:40 a.m., so they fold up their sun canopies and pull in their food.  After the train goes by they lay it all out again. The gross part was that most of their food was left out in the open so the constantly dripping sewer water from the train was landing on supposedly fresh produce.