DENVER, Colorado, July 29 -- The Colorado Public Interest Research Group issued the following news release: On Monday, Colorado kicks off the largest zero-fare transit program in the country with 30 agencies poised to waive fares all day, every day of August. Combined, the agencies participating have an average monthly ridership of over 5.8 million trips. Colorado was already a leading zero-fare state where people could ride transit for free year round in 16 communities including Summit Count  more