Hmm.
Could be a serious problem selling that idea.
Let's see, total US bridge maintenance budgets, divided by the number of people in the country, assume that the retirees are in a taxable bracket, carry the 1... Yep, my calculations indicate that a mere fraction of the taxed dollar goes to places and things they'd likely not use - bridges, public parks, etc. A big percentage goes to fund defense contractors, public union employees, and of course, the ultimate, those who think they're entitled to every single penny that couple has scrimped and slaved over to earn over the years.
Since I'm saying that bridge maintenance should be paid for from the gas taxes already collected, your strawman example shouldn't have to pay a dime for the bridge.