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Photo: TMC RTS

4400-series
Bus #4592 at Wacker and Michigan, working route #123 Illinois Center/Union Express, on June 10, 2005.

Bus #4592 at Wacker and Michigan, working route #123 Illinois Center/Union Express, on June 10, 2005.

Photo by Kevin Zolkiewicz.
Attribution-Noncommercial License.