Four laning of sections from km 277.500 to km 333.500 (Mahullia to Bahragora) of NH 33 and from km 200.55 to km 134.40 (Bahragora to Kharagpur) of NH 6 in the State of Jharkhand and West Bengal under NHDP Phase IVB on DBFOT (Toll) basis

A Concessio ID is a 12-character canonical identifier for an infrastructure concession. The format is CC-AA-S-NNNNNN-K — country, asset class, structure, sequence, and a Luhn check digit. The check digit protects against typos and fabricated IDs.

Concessio IDs are stable for the life of the concession. They do not change if the asset is renamed, sold, or restructured. Cite them in filings, press releases, research reports, and contracts.