We all make mistakes, and some like the one above are more easily corrected than others.
It makes me wonder what kind of expectations of quality the road crews have of themselves. We would all do well to think about the expectations we have of our employees, coworkers, and bosses, not to mention the expectations they have of us. If everyone does not set the bar at the same level, the tension can build quickly. Having a work environment where it's safe to fail, balanced with high expectations of each other, will lead to learning experiences. Ultimately the learning experiences will lead to higher quality outcomes if the team can stay in sync. Set the bar too low or get out of sync of the expectations of others, and you end up with the stereotypical "government job" and results like the above.