Here was the mailer:
And here is www.highwaybill.org now:
Here is what remains of the radio spot audio files:
But wait, the union is exploiting the most recent major bridge collapse:
...and here our question is partly answered. Their fear campaign has left Cincinnati's airwaves and mailboxes because Kasich is determined to make his public-private partnership avoid union labor as much as possible. It appears that this union has stopped warning of the Brent Spence Bridge's imminent collapse since it doesn't appear their members will be building it.
Here we see a paradox of American life today: the unions want construction work and the easiest way to get it is through road and highway projects since they never require a public vote. If public transportation were to suddenly be given the exemption from democracy that has been enjoyed by the highway lobby for over 50 years, we would no doubt see the unions back those types of projects. But this union is unfortunately using fear to get unnecessary make-work projects funded.