The main construction work of the much-awaited 20.1 kilometer metro-rail link from the capital`s Uttara to Motijheel will begin in the late of March this year, said Mohammad Mofazzel Hossain, project director of Dhaka Mass Rapid Transit Development (DMRTD) Project.He said while exchanging views with journalists at the DMRTD Project Officer at Probashi Kalyan Bhaban in Dhaka.Mofazzel Hossain said the work of metro-rail under DMRTD project is going on. Its work would end partially in 2019 and would completely end in 2020, he added.The Project Director said, "Different surveys and basic design of the project has completed and detail design is at final stage."