Johnny Cash used to sing that he could “hear the train a’comin” and now those living near – even not so near – the South Coast Rail construction sites are finding themselves singing the same tune. Some on social media believed the horns are being heard further away from the tracks because of trees that have been cleared along tracks and right of ways where equipment is being brought in for the massive commuter rail construction project. However, Joe Pesturo, communications director at the Massachusetts Bay Transportation Authority, said he doesn’t believe that's why more residents are hearing the train horns.