Work on two elevated corridors in Secunderabad Cantonment is progressing, with pillar construction advancing on NH-44 and demolition and excavation under way at select locations along SH-1. HMDA is developing both projects to improve connectivity and ease traffic congestion. Hyderabad: The works of the elevated corridors on two different stretches --State Highway-1 and National Highway-44 -- in Secunderabad Cantonment Board (SCB), taken up to address the traffic issues and improve the transport.