March 23, 2018 – A CTA “L” train passes through the Tower 18 interlocking during the start of rush hour in downtown Chicago, Illinois. This intersection is one of the busiest ones on the Chicago “L” line that circles the downtown area and branches out to other points around the Chicago area. – #jimstrainphotos #illinoisrailroads #trains #nikond800 #railroad #railroads #train #railways #railway #cta #chicagotrains