The METRA trains running into Chicago from the Western Suburbs are well used, and a lot of freight runs on these tracks as well. A five minute wait at a crossing is a familiar though intermittent occurrence, and on these occasions I curse my fate, but never the RR.
There are gaps of 10 miles between The trains in Dupage County.
One time my car broke down and I tried the public transport.
First I had to take a bus to Downers Grove station. Then the train took me to downtown Chicago. Several blocks walk to another bus stop for bus to 85th street.
It was well over 2 hours commute time! Car ride was under an hour.