Freeways inside military bases

[realjd]

I'm seeing lots of examples of public freeways that happen to be on base property, but OP is asking for examples of freeways that are actually on post and not accessible by the public.

You won't find many full freeways on military installations, mainly because there isn't a need for them. What you will find though are roads with a mix of interchanges and surface intersections. Martin Road and Toftoy Thruway at Redstone Aresnal in Huntsville are a good example of what I'm talking about.

One other interesting thing about roads on military bases is that they tend to follow local design standards for things like traffic signals, probably because they use local contractors. On posts like Fort Campbell which straddles the KY/TN border, this leads to interesting cases where you have KY-spec traffic light installations (with the weird middle light shade) in TN and TN-spec installations in KY.

[texaskdog]

Mopac (Loop 1) in Austin was built along the edge of Camp Mabry, but I don't know if that is Mabry land or not.

[froggie]

Speaking of military bases, there's this weird gate on an I-82 onramp just outside the Yakima Firing Center:

That could also be for an inclement weather (i.e. winter storm) closure.  Several Plains states have similar gates that are used when the plows can't keep up with the snow.

I'm seeing lots of examples of public freeways that happen to be on base property, but OP is asking for examples of freeways that are actually on post and not accessible by the public.

Correct.  Doesn't seem like there are any more beyond the three I initially found, but there are a few base roads here and there (a couple mentioned) that have interchanges on them.

[iBallasticwolf2]

There are some freeways on the Disney Tourist Military Base
http://www.openstreetmap.org/#map=14/28.3651/-81.5593