All you need to do is watch the video (above) I recorded on the Lake Ave Gold Line station to understand (and hear) how loud the cars and trucks are as they zoom by the train platform–constantly–assaulting the ears from both sides. Transit riders wait on these platforms embedded in the middle of freeways on the Gold and Green Lines and are subjected, helplessly, to deafening noise and exhaust fumes. Very unpleasant.
It was already a huge mistake to put train lines down the middle of busy freeways instead of where people actually, you know, walk, but to add insult to injury, must we transit riders also be subjected to unhealthy decibel levels and asthma-inducing car fumes while waiting for the next train to arrive? Will Metro hear our cries above the sound of roaring automobiles?
Personally, I don’t think this is an insurmountable issue and could easily be mitigated by installing a barrier of some sort between the platform and the freeway. A possible enclosed shelter would make these “freeway stations” much more attractive to transit riders who could finally wait “in peace and quiet” (and actually have a conversation with their friends without shouting) instead of being blasted by the incessant roar of speeding vehicles and noxious fumes.