Top down angle aerial of Metra commuter rail system area serving the city of Chicago and its surrounding suburbs via the Union Pacific Railroad, BNSF Railway

metra rail chicago transit urban transportation union pacific bnsf suburban commute downtown railway infrastructure overhead tracks public network topdown cityscape metropolitan connectivity aerial view railroad system commuting line network hub central district service planning intermodal passenger service metropolis lines access junction mobility pattern corridor connectivity gptcommuter flow track aerial city movement transportation architecture suburban link central terminal elevated rails metropolitan journey public conveyance railcar aerials city network transit operations urban circuit platform overview station vista railway crossing transit route locomotive pathway commuter hub