Anecdote: Worked road construction summer 2010 as the guy who put those little sticky tabs on the road to mark where lines are repainted after construction is complete.
Sometimes I'd finish early and get odd jobs. Between Roseburg and the Oregon coast a colleague and I were assigned to stand one of those "your tax dollars at work" signs on a steep slope. Took 2 hours at prevailing wage OT and for total labor cost of $480 between the two of us. By far the steepest labor rate I'd ever been able to charge. Thanks for the money, irony!