Club car service began on the C&NW's commuter lines on April 1, 1929 with a single heavyweight converted coach numbered 6700. As the coach wore out, it was replaced over time, but the replacements were assigned the number 6700. Eventually the service expanded and at its peak (around 1965) it consisted of four cars: 6700, 510, 553, and 555. The last three car numbers related to time; 510 was the historic departure time, 533 and 555 were the arrival times at Lake Forest and Lake Bluff respectively. As service declined, the service demanded less cars, but one remained in service as of the year 2009. Note also that the colors are changing on the equipment, and the club cars will eventually be repainted in RTA colors.