Metra is beginning a test period for quiet cars on weekday rush hour trains on the Rock Island starting today. Loud conversations and music spilling out of headphones will not be allowed, and those who want to talk on cell phones will be asked to move to the vestibule or another car. I hope this experiment works. I know a lot of people who would be grateful to have peace and quiet on their ride. It would be even better if we could have this on off-peak trips.