The Analysis Of Work Zone Road User Costs Due To The Delay Completion Of The Road Maintenance Project

The structural improvement and its extension require work zone at the stage of road maintenance project implementation. This work zone produced a negative impact including the decreased road capacity and travel speed. These involve road user and social costs due to disruption of the environment nearby the project. In the U.S, road user costs calculations were used as a delay claim in a road project completion. This method is known as the incentive/disincentive (I/D) method. An investigation on road user costs due to work zone in Indonesia however, has not yet been conducted. The first stage of this study is to conduct a comparison analysis between the road users costs and delay claims under the contract. A national road improvement project in Bali Province on fiscal year 2012 is used as a case study. Paired statistical t-test and Wilcoxon sign rank test were used for data paired difference test. The study results show that delay claims are applied for one per mil (1/1000) of the contract price. Road users cost due to work zone is an average of (13.7/1000) of the contract price. Statistical test indicated that road user costs are not equal to delay claims stipulated in the contract (t-test p=0.012<0.025 and Wilcoxon sign test p=0.005<0.025).