In the third installment of "Clean Cities Success Stories," a new bi-weekly segment showcasing Clean Cities coalition efforts to expand the use of alternative fuel and advanced vehicle technologies, viewers will learn how Dallas County Schools have incorporated biodiesel and propane in their everyday operations... this short segment will air on PBS stations nationwide starting Oct. 2, 2009 (in the regular weekly MotorWeek timeslot on your local PBS station). It will also be broadcasted on the SPEED Channel on cable and satellite networks beginning Oct. 9, 2009.For show times in your area, check the MotorWeek and SPEED Channel Web sites.