This is the end of the line, literally. The CTA Blue Line terminates at Forest Park, where L trains arrive every 15 minutes, linger briefly, then begin their 26.9 mile return journey east to downtown then northwest to O’Hare. This is also the end of the line, figuratively, for Chicagoans whose combination of mental illness, bad luck, bad life choices and inability to manage in a bad, COVID-ravaged economy forces them to ride the trains tonight, seeking a warm, dry refuge on this 30 degree night at the end of February. “It’s been rough,” says Ladislao Vasquez, shortly after 9 p.m. He w...