He shouldn't have done it if only because of the optics.
If this does turn out to create additional value in his properties, he should be popped for this.
But I'm not automatically persuaded that adding another lane to an existing highway translates directly into higher property values, but I have no knowlege of that area. I've never seen that happen anywhere I've been. Put in a new highway across property that had none? Heck yeah that adds value. But adding another lane? I'm not so sure. We just did that here in my town and it did the exact opposite. Some buildings with long established business have set vacant now for a couple of years. Moreover, when you go to widen a road/highway that often completely screws up exisitng business, access is severly hampered for pretty good period. Business takes a big hit.
Oh, and really don't get the whole computer/website thing in the opening paragraph. He has a link on his 'private' sites that go to his campaign and that's forbidden? I would've never guessed. I can see a problem if it's the other way around. ("Hey want to me to vote for your stuff? Click on the links to one of my business below and buy lots of stuff" lol)
Fern