By what means of transportation did FDR get to Chicago to deliver his "New Deal" speech?

Primary mode of transportation for FDR was by train. It was easier to get him on and off of a train in secret if the President was on a train. A train could be run onto a siding where the president's car could be offloaded and the president transferred to it in secret. FDR kept the fact that he was lame from polio a secret from the nation.