It seems clear a tunnel is required for the airport link unless Metro 2 is built to take geelong trains off the RRL freeing up capacity for airport line trains?

With the state of Victorian finances with the onset of the issues around COVID19 and large investments in the health system and reduced receipts, using a super fund for the tunnel as outlined in https://t.co/ADfg0aUOAs makes a lot of sense to me.  Structure the deal for a buyout if you think it is better.

If this is not doable then take some of the wasted money being planned for the North East Link and put that into the western network capacity in the form of a tunnel.