Delhi-Gurgaon highway gets mega upgrade, elevated corridor to cut down traffic chaos details According to initial estimation, the elevated corridor is expected to be a 20-km-long stretch and likely to incur a cost of Rs 5,000 crores. However, the final cost can be reached once the project report is ready. 20-km-long stretchAccording to initial estimation, the elevated corridor is expected to be a 20-km-long stretch and likely to incur a cost of Rs 5,000 crores. However, the final cost can be reached once the project report is ready. As per the Delhi decongestion plan, the elevated corridor will start from AIIMS/INA and will stretch up to Nadira Marg, linking the Mehrauli-Gurgaon Road and Gurgaon-Faridabad Road.