This double yellow centerline (featured above) is the municipal boundary between two large New England communities. In 2004, the two communities collaborated on a 2” mill-and-fill project from curb to curb and split the cost. In 2010, the community on the right decided it was the optimum time to intervene with some proactive maintenance, and it spent about $4 per square yard doing crack sealing and a 2-lift micro surfacing treatment. The community on the left decided not to participate in this pavement preservation project and to defer any preventive maintenance.
By October of 2018, the result of the two approaches was clear. The community on the right is readying to do crack sealing and micro surfacing again, whereas the community on the left must now plan and pay for a more costly rehabilitation.