We've made a point to ride all the lines, but mostly ride Red Line (with a dash of Green), plus the Providence commuter rail line. Our rides tend to be during e

We've made a point to ride all the lines, but mostly ride Red Line (with a dash of Green), plus the Providence commuter rail line. Our rides tend to be during evenings, so the cars aren't sparkling clean. But, so far, the worst we've experienced are some loose french fries.