Here’s a rail network map that shows the commuter rail lines of both New York City and Philadelphia. It’s by Evelyn Ivy, who explains on Mastodon that it took six months of work to complete. “Showing five different commuter rail systems (#CTRail, #MetroNorth, #LIRR, #NJTransit, and #SEPTA), this map depicts everywhere a passenger can get to by train from NYC or Philadelphia without using Amtrak.” (The keys are Trenton and New Haven, where you can hop from one system to the next.)