In Delhi, 14 purple AC buses under hop-on hop-off Bus Service was launched on to facilitate an easy and convenient 'Dilli Darshan'. Launching the unique service, Chief Minister Sheila Dikshit said, the number of buses will be increased after getting feedback from the tourists.The new service for the public will start from October 1 while the Ho Ho buses will run for 3 days from tomorrow free of cost for under-privileged children and senior citizens. The buses will run across the city covering many important tourist destinations, including historic monuments, museums and markets. The service has been arranged by the Delhi Tourism and Transport Development Corporation.