Journal of Civil Engineering Science & Technology Vol. 02/No. 01/ April 2021 30 RAILWAY STRUCTURES PERFORMANCE DUE TO FREIGHT INTERMODAL SERVICE AT BOJONEGORO – KALITIDU ROUTE Nugroho Utomo 1* 1 University of Pembangunan Nasional “Veteran” Jawa Timur, *Corresponding Author: nugroho.ts@upnjatim.ac.id INTRODUCTION Goods movement using container are quite efficiently assessed because it can carry a great amount of goods fit to container capacity. When container is began to introduce as a secure considerations of goods packing methods, mostly held by truck. Then, truck become a main choice of freight transportations. Freight transportations is a primary component of all supply-chain and logistics systems, but in contrary using a truck as its transportation means causing many problems such as air and noise pollutions, traffic congestions, road accidents and road damage [1]. Now, in other hands existence of truck as a freight transporters becoming inefficient when causing traffic congestions increasing and road damage mainly at Java Islands Northern route. Depart from this facts, so government is looking for another means of freight transporter which more efficient with a bigger load capacity advantages. This options goes to train as a solutions of intermodal freight transportations lack. In order to supporting intermodal freight transportations, right now double track of railway is available for Jakarta – Surabaya route (Northern line route). Since 2012, northern line double track railway have already constructed and in April 2014 began to operate on several parts of route. Double track railway is a two railway track that designed to serve train operations on a both ways contrary, so risk of a railway accidents and departing schedule delays can be reduced in effectively [2]. Intermodal freight transport involves the transportation of freight in an intermodal container or vehicle, using multiple modes of transportation such as train with railway, Abstract Goods movement using container are quite efficiently assessed because it can carry a great amount of goods fit to container capacity. Freight transportations is a primary component of all supply-chain and logistics systems, but in contrary using a truck as its transportation means causing many problems such as air and noise pollutions, traffic congestions, road accidents and road damage. Depart from this facts, so government is looking for another means of freight transporter which more efficient with a bigger load capacity advantages. This options goes to train as a solutions of intermodal freight transportations lack. In order to supporting intermodal freight transportations, right now double track of railway is available for Jakarta – Surabaya route (Northern line route). By now, noted that freight transportation with double track railway frequency is potentially increase to 15 trip per days with capacity 500 TEU (Twenty feet Equivalent Units) per days and fuel consumptions (with truck) can be thrifted into 115 kl per days also reducing carbon monoxide emission amounts 350 tons per days. According with an official statements from Directorate General of Railways, Ministry of Transportations, explained that Jakarta – Bojonegoro route on double track railway is fully operated so this paper is conducted to determining feasibility of railway structure performance due to freight intermodal transportations at Bojonegoro – Kalitidu route. Railway structure performance feasibility is observed from loading distributions, rail strength, rail sleeper strength, and railway subgrade endurance to planned freight trains. As a result of this research obtained that tension force that occurred on rail is 830,10 kg/cm 2 < permitted tension on rail (first class rail) 1325 kg/cm 2 . So, tension force that occurred on rail is safe. Moment force that occurred on rail bottom is 14521,25 kg.cm < permitted moment force (150.000 kg.cm) Moment force that occurred in the middle of rail sleeper is 58993,978 kg.cm < permitted moment force (93000 kg.cm). Tension force that occurred on above railway subgrade (σ2) is 4,17 kg/cm 2 < qu (29,671 kg/cm 2 ). It means that railway subgrade is capable to supporting load of freight transportation operations along Bojonegoro – Kalitidu route. Keywords: intermodal freight transportations, train, double track railway, railway structure performance. Article Info Received 25 April 2021 Revised 27 April 2021 Accepted 29 April 2021