The tunneling operations of the blue track tunnels of the Riyadh train were launched on Wednesday afternoon by the Manifa machine in the presence and inauguration of HRH Prince Faisal bin Bandar bin Abdulaziz, Governor of Riyadh, Chairman of the Supreme Authority for the Development of Riyadh City and Chairman of the Committee overseeing the implementation of the King Abdulaziz Public Transport Project - train and buses, and the second machine to be launched within the project.