The HOHO bus service in Delhi is a unique PPP initiative. Delhi Tourism & Transportation Development Corporation Ltd (DTTDC) has selected Prasanna Purple Mobility Solutions Pvt. Ltd. (PPMSPL) and Urban Mass Transit Company Ltd. (UMTC) for introducing this unique service. Together, PPMSPL and UMTC have formed a Joint Venture called Purple UMTC Transit Pvt. Ltd to operate HOHO buses in Delhi.