1,000 RTV (rural transport vehicles) and tourist buses will ply on DTC routes for next two days.
"These buses have been allowed to ply on DTC routes under special service. The buses would display DTC route numbers and charge DTC fares," he said.
A statement from Chief Minister Sheila Dikshit's office said all the major trade unions of DTC including DTC employees Congress, Delhi Parivehn Mazdoor Sangh, DTC Worker's Union and DTC Unity Center have agreed not to participate in the strike.
The strike may also affect the working of Municipal Corporations as some of the employees, particularly the cleaning staff, have said they also join the strike.
Government officials said that non-medical staff at various state-run hospitals have also indicated joining the strike.
Normal life is likely to be crippled across India as workers from various sectors including transport and banking are set to join the protest against the Centre's economic and labour policies.
Apart from unions owing allegiance to the Left, the pro-Congress INTUC and pro-BJP BMS are also participating in the strike.
The unions have put forward a charter of 10 demands.