Ahmedabad: The third edition of cyclothon in the city drew 4,500 enthusiasts from across the nation. Several commuters face inconvenience due to the no-vehicle zone on roads. The race was flagged off by Minister of State for Transport and Urban Housing Shankar Chaudhary in presence of Mayor Meenaxi Patel, Municipal Commissioner D Thara, AUDA Chairman Bhupendra Patel and other dignitaries.