RTA (Regional Transportation Authority) www.rtachicago.com METRA www.metrarail.com Chicago Transit Authority (CTA) www.transitchicago.com PACE www.pacebus.com Amtrak www.amtrak.com IDOT (Illinois Department of Transportation) www.dot.state.il.us IDOT expressway information congestion map www.ai.eecs.uic.edu/GCM/congestionmap.html Airports www.chicagoairports.org