Also the premier is open to more level crossings in the future, so likely will be a few on the South Morang line worthy of removals as mentioned Keon Park. Reservoir will be separated at the same time as the Bell street crossing, so still better than if it was done on it own. But there aren't as many level crossings on the South Morang line when compared with the Upfield or Frankston line. But all of the crossings are not even near Reservoir.
Most crossing are located south of Reservoir (10 crossings) all are close enough to be removed together making it easier to make it a package of works but they are not as busy as the ones up north. The Authurton Road crossing and Beavers Road as one package in Northcote. Second package of works Woolton ave, Normanby ave and Hutton street in Thornbury. And the final package of works Cramer street, Murray Road and Regent street in Preston. The level crossing Oakover road should be included in Bell street removal, but if not will be included in second package.
There are 6 crossings north, with only 2 being on really busy main roads (Keon Park and Childs Road) but Keon Park is more near two other crossings Settlement Road and Station street. If Keon Park was up for removal, I would package those three package since they are quite close proximity from each other. The other three including Childs Road can be another package of works. These packages would take priority.
If I were to rank the crossing to remove together first, Keon Park package of works, then the Child Road package, then the Preston package, then the Thornbury package and lastly the two in Northcote. If another 50 crossings were picked for removal it would be the 6 crossings North delivered in two packages to save money.
If I was going to be make it easier for the future, I would try to get the Oakover Road crossing removed at the same at as Bell street. Not as busy but it is closer to Bell street to warrant a removal and not add significant cost to the project, and then it could package the crossings in bunches of two or three. Adding Keon Park would result in extra funding on top of the 50 crossing, it would be done separately. I'd rather see it removed with the other three crossing in the new list of 50 crossings. The new list which will happen sooner than 2022, since more crossing are being fast tracked at the moment.