The cost-effectiveness of different maintenance treatments including micro surfacing, HMA overlay and mill & fill were evaluated by using OPTime. The treatment effectiveness was calculated as the difference in computed areas associated with the post-treatment performance indicator curve and the do-nothing curve. It was found that mill & fill had the highest unit costs, followed by HMA overlay and micro surfacing. HMA overlay had the highest effectiveness, followed by mill & fill and micro surfacing. Micro surfacing was found to be the most cost-effective treatment due to its low cost.