For suburb to city center, you want multi-track train lines which only stop at a few stations and then switch over to a middle track which then goes the rest of

For suburb to city center, you want multi-track train lines which only stop at a few stations and then switch over to a middle track which then goes the rest of the way downtown without stopping. The suburb I grew up in was about 20 miles outside of Chicago and the rush hour express train would get you downtown in about 25 minutes whereas doing the same route by car would take you 40-100 minutes during rush hour.