Five flyovers in the capital are being built by the National Highways Authority of India (NHAI) at Rasulgarh, Vani Vihar, Acharya Vihar, CRP Square and Fire Station Square. Work on the flyovers, all on National Highway-5, began on December 14 last year. The projects were to be completed within two-and-a-half years. The Telegraph prepares a progress report and pinpoints problems that beset them