Subway Car Accelerometer

This would be a candle flame Accelerometer for subway cars so that standing passengers could more accurately observe the actual acceleration of a subway car and thus maintain a better ballance.

The subway cars in my city accelerate and deccelerate unevenly - I am guessing this is because the poor subway drivers have no one to talk to all day and nothing to look at except for a dark tunnell and so they end up communicating in the only way they can, with their accelerator foots (or would that be feet?). The response that they receive through this kind of communication would come in the form of kick back from the ballancing readjustment that the people on the train excecute in response to the acceleration vagaries. The response would probably depend on how many people are on the train and how many of them are standing up -- and how strong their readjustment to the change in acceleration is. But I am convinced there is some kind of communication going on there. I would like to be able to communicate more fluently with these poor lonely subway car drivers and so would like to reccommend to the subway system that they install accelerometers in each car to make communicationn more visual and less of an inner ear thing. The accellerometers could be simple candle flame accelerometers (see link) or, even better, just a stick on a spring with the movement dampened by foam, so that when the train accelerated more the stick pointed toward the back of the train.