Analisis Tingkat Keandalan Operator Pengendali Kereta Api Pasca Pembangunan Jalur Ganda Lintasan Kereta Api (Double Track) (Studi Kasus : Daerah Operasi IV Semarang)

Double track railways which built alongside Daop 4 Semarang start to operate at april 4th 2014. As there is this track, there will be least amount of train crosses location. Train control operator is the one who determine train crossing. Issues to be examined in this study is whether the presence of double track railway will increase or even decrease the reliability of controller operator. With this new track, controller operator will have to determine a new train route. On the other hand, workload is reduced because of the reduced train cross location. As workload reduced, the expected performance of work will increase in order to achieve maximum reliability. To find great value of reliability required a calculation of reliability with HEART method. HEART (Human Error Assessment and Reduction Technique) is a method used in determining the value of human reliability based on quantitative calculations and assessment of expert. The results of the study in the form of nominal reliability (R) is obtained from the calculation of 1-HEP. From the calculation, the value of HEP obtained 0.027 so the reliability (R) will be 0.972. Double track was shown to minimize the probability of human error performed by railroad crossing control operator as the reduction of train crossing location