Penentuan Rekomendasi Standar Track Quality Index (TQI) untuk Kereta Semicepat di Indonesia (Studi Kasus : Surabaya - Cepu)

Abstract

The growth of transportation sector is inevitable things that appear as public transportation user needs, commonly they need safe, reliable and punctual transportation. Medium speed train on Java's north line with maximum speed 160 km/h on existing track emerge as a solution that issued by local Indonesian government. Increasing speed on existing track must be considered by increasing TQI value. TQI is track quality index that consists of : track gauge, cant, longitudinal level, and lateral level. The recent value of TQI on existing track along Java's north line is 20, and Surabaya-Cepu line was taken as object of this examination. By using simple linear regression and multi linear regression that involved 4 parameters and speed as an approach, the value of TQI that obtained as recommendation on maximum speed 160 km/h.

Prediction of speed limit on the railway track using track quality index and multibody dynamics simulation

“…As a basis for determining the quality of railways and evaluating their condition, a standard value is needed to evaluate the quality of railways called the Track Quality Index (TQI) [4], [7]. The safety risks from the trackside and the rail maintenance method on the train depending on the track's maintenance and the speed limits of the trains operating on the track [8]. In measuring the track quality index, several parameters of the geometry of the railway are needed that affect the measurement of the quality of the rail, including the lift, the alignment, the height, the width of the track, twist, curvature, and warp [7], [9]- [11].…”

“…Kereta Api Indonesia is the EM-120 type [12]. The calculation segmentation depends on the method used, including 25-40 meters at every 200 meters [8], [13]. In addition, the quality index can also be used to monitor track degradation and summarize most railway track conditions.…”