Road Asset Management with User Cost of Safety and Comfortably evaluated by Stated Preference Method

In this paper, the decrease of safety and the comfort caused by deterioration of pavement and the cost generated by detour caused when the road pavement was repaired were defined as a user cost, and the influence given to LCC and the best repair strategy was analyzed.The Conjoint analysis was used for the evaluation of safety and the comfort. Especially, even if it was same MCI, MCI showed that WTP was different according to the state of deterioration (crack rate and amount of rut) in 5.0 or less. Moreover, the trial calculation that used the virtual road network was done. Under the situation with a little traffic, the cost of repairing the defect is predominant about LCC. However, the best repair level rises under the situation that has a lot of traffic than the city part. As a result, it was shown that there was a possibility of influencing the repair strategy.