{
    "success": true,
    "data": {
        "id": 1757938,
        "msgid": "knkt-findings-on-signalling-problem-prior-to-bekasi-timur-train-collision-1779542068",
        "date": "2026-05-22 17:16:14",
        "title": "KNKT Findings on Signalling Problem Prior to Bekasi Timur Train Collision",
        "author": "",
        "source": "CNBC",
        "tags": "",
        "topic": "Infrastructure",
        "summary": "KNKT\u2019s preliminary report identifies three causes of the Bekasi Timur collision, starting with an anomaly in railway signalling between Bekasi and Bekasi Timur. Simulations suggested the Bekasi outgoing signal could show a green aspect even as following signals indicated danger, risking a misdetection of the 5568A train. The full investigation will be released in three months.",
        "content": "<p>Jakarta, CNBC Indonesia - The National Transportation Safety\nCommittee (KNKT) has disclosed an initial investigative report into the\nrail crash involving the Argo Bromo Anggrek train and the KRL Commuter\nLine service from Kampung Bandan to Cikarang at Bekasi Timur Station on\n27 April 2026. The incident involved the Argo Bromo Anggrek train,\nnumber KA 4B, on the Gambir-Surabaya Pasar Turi route, and the KRL train\nnumber 5568A on the Kampung Bandan-Cikarang route.<\/p>\n<p>This is the preliminary investigation result announced by KNKT at a\nhearing before DPR Commission V. The full investigation into the Argo\nBromo Anggrek-KRL collision will be announced in three months\u2019 time.<\/p>\n<p>Chairman Soerjanto Tjahjono said in the preliminary report that there\nwere three causes of the collision of the two trains. First, there was\nan anomaly in signalling between Bekasi Station and Bekasi Timur\nStation.<\/p>\n<p>\u2018Based on the results of the railway service simulation (Train\nStepping) conducted in the Bekasi Station Equipment Room and field\nsimulations after the incident, with the scenario of the train route\nrunning directly from track 3 at Bekasi Station and the condition of\ntrack 104BT (the Bekasi Timur Station area) being occupied, the signal\nexiting J12 (Bekasi Station) can show the green aspect (symbol 5) or a\nsafe aspect,\u2019 Soerjanto said in his presentation at the hearing before\nCommission V of the DPR, on Thursday (21\/5\/2026).<\/p>\n<p>\u2018The repeater signal or UB104 block repeater shows a horizontal\nilluminated white light (symbol 9C3) indicating a red block signal. Then\nthe B104 block signal shows a red aspect (symbol 7). The railway service\nsimulation conducted showed results consistent with the signalling\naspects,\u2019 he added.<\/p>\n<p>This indicates that the signal at Bekasi Station could not detect the\nKA 5568A at Bekasi Timur, which means the signal exiting Bekasi Station\nshows a safe aspect or green light. Then the repeater signal shows an\nunsafe aspect or a flat-line lamp, and the block signal shows an unsafe\naspect or red.<\/p>\n<p>In fact, the exit signal from Bekasi Station should display a caution\naspect or yellow light, if the preceding signal behind it still shows an\nunsafe indicator or red.<\/p>\n<p>\u2018Signal at Bekasi which cannot detect the presence of 5568 (KRL) at\nBekasi Timur has one condition\u2014an unshift condition in that state,\u2019 he\nsaid.<\/p>",
        "url": "https:\/\/jawawa.id\/newsitem\/knkt-findings-on-signalling-problem-prior-to-bekasi-timur-train-collision-1779542068",
        "image": ""
    },
    "sponsor": "Okusi Associates",
    "sponsor_url": "https:\/\/okusiassociates.com"
}