Pavement preservation processes save money in the long-term by extending pavement life while also enhancing safety, appearance, and maintaining pavement quality.
Three preservation treatments over 25 years costs $2/yd^2 per treatment for a total cost of $6/yd^2 over the life of the road.
Using pavement preservation after not treating for 11 years costs $4/yd^2 and only lasts about four years between treatments due to a deteriorated road base structure.
Not treating for 12 or more years will result in a required mill and fill or full rehabilitation with a cost upwards of $12 to $16/yd^2.
1. Right Treatment – Apply treatments that stop deterioration and restore the necessary pavement surface qualities.
2. Right Road – Provide adequate and consistent funding to treat roads before the investment is lost.
3. Right Time – Establish pavement management systems to evaluate pavement condition and provide for the application of preventive maintenance at the proper times.
Many studies support the effectiveness of preventive maintenance. The “Strategic Highway Research Program (SHRP) Project H-101, Experiment SPS-3” and the “National Cooperative Highway Research Program (NCHRP) Synthesis 223, Cost Effective Preventative Maintenance” both found slurry seal to be an effective treatment.
The NCHRP Synthesis, a survey of sixty state, province, and local transportation agencies, confirms that the most cost-effective pavement management strategy – which results in the highest pavement condition rating – is to perform preventive maintenance activities on the better-rated pavements first and then fund the rehabilitation of the poorer-rated pavements. The funding strategy that addresses the worst pavements first is the least cost effective.