Baloney, regarding I-77. Negotiating with Fort Jackson for the I-20 to I-26 section lasted years, since DOD's probably the most selfish federal department out there in terms of property. Heck, I visited Columbia during those years when I-77 sat there, unfinished.
Exactly what Interstate highway corridor doesn't take years to plan, secure ROW and build? I-77 got finished pretty damn fast compared to freeway projects today -which are now taking many decades to get anything done.
Back to I-781: So, sure, they were all for I-781 leading up to their gate, but remember that the deal was a threat that would have devastated the North Country: Build it or we close.
That is still not an example of the Army blocking the building of a freeway. It's more of an example of the Army forcing NY State and US DOT to give them a fancy high dollar Interstate quality access road.
Had it been an upgrade to NY 12 coming from the request of the State or local communities or the like, my bet is they would object voiciferously, claiming national security and whatever else.
That's pure speculation. And I'm not sure what upgrades could be applied to NY-12 through Watertown that are realistically practical at all. I don't think Watertown is a big enough town to justify a freeway loop or bypass. I was pretty surprised when I first learned I-781 was being built off I-81 to Fort Drum. But it is pretty modest, even minimal, compared to other freeway spurs.
The idea that since DOT and DOD are both federal that they are in some sort of cooperative happyland goes in the face of decades of research on how federal government actually operates.
I never said the Army and US DOT have some kind of "happyland" relationship. Nevertheless, the US military has indeed given up property to make way for expanded highways. In the case of Rogers Lane between Lawton and Fort Sill it is an infinitely EASY choice on where to slice off extra territory for a highway's expanded ROW.
If you think the Army would raise hell over some vacant unused land on the edge of their boundary road that's nothing compared to the kind of hell thousands of people in Lawton would raise over getting their property seized to expand Rogers Lane Southward. The neighborhood between Fort Sill Blvd and Sheridan Road is called "Zone 1," which is mostly a lower income, minority neighborhood. It wouldn't look so good politically to displace dozens of those residents. Matters would get worse farther West
as the existing homes get more and more expensive. Over past 67th there are mansion-size homes on the edge of Rogers Lane. Those home owners sure as hell wouldn't put up with the government coming along and wanting to give them "fair market value" for their property to move. Some of those home owners are well-connected too.