on Sun Dec 1 16:42:00 2019, in response to Railfanning in Chicago - any advice?, posted by JRR4 on Sun Dec 1 16:33:43 2019.
CTA Brown and Pink line for the grade crossings. Only heavy 3rd rail rapid transit in USA with grade crossings (Excluding Metro North and LIRR as they are commuter trains powered by 3rd rail in the inner suburbs for the majority). Metra Rock Island Suburban branch and Metra Electric South Chicago branch both have more of a light rail feel with street median ROW. Both unique for commuter railway, the latter electric powered.