A decision is now due to be made over the next 30 days on whether to use a full design, build, finance, operate and maintain (DBFOM) structure for the deal.
Colorado is also working with Macquarie on the financial aspects of the proposed plan, which will see the development of the highway, running across the state from east to west.
In addition, the state is also working on two new highway P3 deals, which could be brought to market next year.
CDOT is preparing a billion-dollar deal for the northern section of the state’s I-25 highway and the C-470 beltway, with a DBFOM structure currently being considered.
Plans to issue tenders for the deal have yet to be confirmed however.