EVALUATION OF GEDEBAGE - TASIKMALAYA - CILACAP (GETACI) TOLL ROAD PLANNING AND FEASIBILITY SECTION OF GEDEBAGE - NAGREG (STA. 0+000 - STA. 22+850)

• Main Author: C.P.H. Sihombing, Ari
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik sipil
• Online Access: https://digilib.itb.ac.id/gdl/view/86151
• Institution: Institut Teknologi Bandung

The construction of Gedebage – Tasikmalaya – Cilacap (Getaci) Toll Road aims to improve connectivity of the island of Java, specifically at the section of Gedebage – Nagreg (STA. 0+000 – STA. 22+850). To achieve this, it is necessary to do proper planning for the toll road, which consists of traffic demand estimation, technical design, construction method determination, cost estimation, and financial analysis. The traffic demand estimation is conducted using the four steps transportation modelling (4SM), that includes trip generation, trip distribution, modal split and trip assignment. The modelling results projected a traffic flow of 10,238 vehicles per day in 2025 with an average growth rate of 7.61% per year that eventually reaches 87,017 vehicles per day at the end of its concession period in 2065. The technical design is then conducted, which comprises of design of road geometry, pavement, drainage system, bridge and retaining wall, and road signage and marking. The toll road is designed using a 4/2 D road type along a length of 23.648 km that will later be expanded to 6/2 D in 2055. The road is designed with 7 horizontal alignments and 15 vertical alignments. Alongside the main road, trumpet interchanges are also designed at Gedebage and Nagreg with 4 ramps each using 1/1 road type. The pavement is designed to use jointed reinforced concrete pavement (JRCP) with a 325 mm thickness and lean concrete base. The toll road drainage is designed using a trapezoidal side ditch channel with dimensions of b = 0.6 m and h = 1 m, as well as 7 box culverts with the dimension of 1.5 m x 1.5 m. The designed bridge is a girder bridge with a length of 21 m that utilises PC I H- 125 girders, with a 13.2 m counterfort retaining wall as its abutment. Road signage, road markings, and construction method is adjusted accordingly to the design and relevant regulatory standards. The construction cost of the toll road is estimated to reach Rp4,233,876,573,506. The financial analysis is then performed based on investment cost and revenue analysis by making use of NPV, BCR, IRR and payback period. According to those methods, the toll road is deemed financially feasible for construction and beneficial to improve connectivity and economy, specifically in the West Java region.