alurail • Platform & Legal Ecosystem

About alurail Platform & Ecosystem

Independent Geospatial Visualization, GAPEKA 2025 Railway Physics Simulation, and Community Train Telemetry in Indonesia

GAPEKA 2025 • Railway Physics Engine • Viterbi Telemetry

Effective Date: January 1, 2025 (GAPEKA 2025)

What is alurail?

Independent Railway Operational Visualization and Community Telemetry

alurail (internally known as Aluline TGV) is a premier, non-commercial web platform dedicated to visualizing the movement, operational kinematics, and schedules of passenger and freight railway traffic across the Republic of Indonesia. Developed independently by alula (alula.web.id), the platform bridges complex open railway schedules with modern geospatial rendering—enabling railway enthusiasts (railfans), daily commuters, photographers, transport planners, and the general public to understand train operations with unprecedented clarity.

Unlike static timetable viewers or generic transport portals, alurail combines authoritative timetable data with a real-time Railway Physics Engine and voluntary crowdsourced GPS telemetry, recreating the heartbeat of national rail corridors across Java and Sumatra in continuous real-time.

GAPEKA 2025

Official Scheduling Standard

100% Vector

Geospatial Track Alignment

Viterbi HMM

Map-Matching Accuracy

Multi-Transit

Intercity, Commuter, High-Speed

How It Works: The Three Pillars

Synergy of Timetable Reconstruction, Kinematics Simulation, and Live Telemetry

1. GAPEKA 2025 Reconstruction

The system imports official Grafik Perjalanan Kereta Api (GAPEKA 2025) matrices. Every departure, arrival, stopping dwell time, overtaking condition, and operational sequence is digitized into an interconnected multi-node routing network.

2. Railway Physics Kinematics

Moving trains do not teleport. A custom physics engine calculates realistic instantaneous velocities based on locomotive tractive power, passenger coach mass, track gradients (per-mille ‰), horizontal curvature, civil speed restrictions, and standard deceleration curves.

3. Crowdsourced Live GPS Cast

Passengers on board active trains voluntarily share live satellite GPS via the web or Android client. The platform ingests telemetry and provides instant real-world verification to the simulated tracking state.

4. Viterbi Map-Matching Filter

Raw mobile GPS signals drift inside valleys and tunnels. alurail applies a Hidden Markov Model (HMM) Viterbi map-matching algorithm against PostGIS track vectors, snapping raw pings strictly to the operational track centerline.

Railway Network Scope & Fleet Coverage

Comprehensive Multimodal Coverage Across Java and Sumatra Corridors

alurail maps and visualizes the full operational spectrum of the Indonesian railway network. Train movements on the radar are calculated directly from official GAPEKA 2025 timetables, physics acceleration/braking curves, and voluntary passenger-shared GPS telemetry (GPS Cast). The platform covers all major rolling stock types and operational service categories:

Intercity & Long-Distance Trains (KA Antarkota)

Long-distance passenger corridor trains connecting major regional capitals across Java and Sumatra. Covers Executive, Business, Premium Economy, Luxury Sleeper, Panoramic, and Compartment Suites operating across Daop and Divre territories.

kereta jarak jauh kereta api jarak jauh kereta antarkota kereta api antarkota kereta antar kota kereta api antar kota

Commuter Line & Urban KRL (Jabodetabek & Agglomeration)

High-frequency electrified suburban rail networks managed by PT Kereta Commuter Indonesia (KCI). Encompasses all KRL Jabodetabek corridors (Bogor, Cikarang, Rangkasbitung, Tangerang, Tanjung Priok, Airport Rail Link) and Yogyakarta–Solo–Palur lines.

KRL jabodetabek kereta rel listrik jabodetabek KCI commuter line kereta commuter line

Jakarta–Bandung High-Speed Railway / Whoosh (KCJB / KCIC)

Southeast Asia's premier high-speed bullet train operated by PT Kereta Cepat Indonesia China (KCIC). Cruising at commercial speeds of 350 km/h between Halim (Jakarta), Karawang, Padalarang, and Tegalluar Summarecon (Bandung).

kereta cepat jakarta bandung kereta api cepat jakarta bandung KCJB kereta cepat indonesia china kereta api cepat indonesia china KCIC whoosh kereta cepat whoosh kereta api cepat whoosh

Local & Regional Agglomeration Services (KA Lokal)

Vital commuter and regional passenger transit connecting suburban hubs and smaller stations: Commuter Line Dhoho, Penataran, Tumapel, Blorasura, Jenggala, Prambanan Ekspres (Prameks), Bandung Raya, Walahar, Jatiluhur, Sibinuang, Sri Lelawangsa, and Pioneer Trains.

kereta lokal kereta api lokal

Freight Logistics: Babaranjang, Cargo, Cement & Tankers

National industrial and energy logistics backbone: Heavy-haul coal trains (KA Babaranjang) in South Sumatra, containerized intermodal cargo, bulk/sack cement distribution trains, and Pertamina fuel tanker/ketel trains powering national energy depots.

kereta barang kereta api barang kereta babaranjang kereta api babaranjang babaranjang kereta kargo kereta api kargo kereta semen kereta api semen kereta tanker kereta api tanker kereta ketel kereta api ketel kereta pertamina kereta api pertamina

Urban Rapid Transit: LRT Jakarta, LRT Jabodebek, MRT & LRT Palembang

Modern metropolitan grade-separated transit systems: MRT Jakarta North-South Line, LRT Jakarta Phase 1, LRT Jabodebek (Cibubur & Bekasi lines to Dukuh Atas), and LRT South Sumatra (LRT Palembang connecting SMB II Airport to DJKA).

LRT Jakarta kereta LRT Jakarta LRT Jabodebek kereta LRT Jabodebek MRT Jakarta kereta MRT Jakarta LRT Palembang kereta LRT Palembang LRT sumatera selatan kereta LRT sumatera selatan LRT sumatra selatan kereta LRT sumatra selatan

Extraordinary Trains (KLB) & Ambarawa Steam Heritage

Unscheduled operational duties: Extraordinary Trains (Kereta Luar Biasa / KLB) for VIP inspections, test runs, ballast delivery, and private tourist charters; combined with historic preservation of rack steam locomotives at the Ambarawa Heritage Railway Museum.

kereta heritage ambarawa kereta api heritage ambarawa kereta luar biasa kereta api luar biasa KLB

Operational Principles: GAPEKA 2025 Calculation & Voluntary Crowdsourced GPS

Train coordinates and positions rendered across the platform are algorithmic simulations calculated from official GAPEKA 2025 timetables, sectional civil speed limits, and train mass kinematics. The platform does NOT claim autonomous live GPS dispatch or official railway signaling feeds; positions are schedule-derived estimates calibrated in real-time by voluntary passenger GPS broadcasts (GPS Cast).

Complete Feature Ecosystem

Engineered for Railfans, Commuters, and Geospatial Analysts

Follow Mode

Locks the map viewport to any active train with dynamic smooth camera easing and heading angle rotation.

Spotting Mode

Calculates approaching trains at any location or bridge, enabling railway photographers to plan camera shots.

Elevation & Slopes

Inspects interactive elevation cross-sections, gradient climb profiles (‰), and curve radius along the railway track.

Rolling Stock Fleet

Curated technical database of locomotives (CC 201, CC 203, CC 206), passenger coaches, DMUs, and generator cars.

Depots & Balai Yasa

Geo-referenced boundaries of Balai Yasa (Manggarai, Lahat, Yogyakarta, Gubeng), locomotive depots, and stabling yards.

alurail Suite & Gallery

Community photo gallery with high-resolution viewing, EXIF telemetry metadata, and verified photographer credit.

Official Operational & Non-Affiliation Disclaimer

alurail is an independent community simulation and timetable visualization platform. Unless explicitly confirmed via verified Live GPS Cast, all train positions rendered on the radar are algorithmic estimates derived from GAPEKA 2025 timetables and physics models, not official live railway signaling or dispatch telemetry.

Real-world railway operations are subject to unscheduled delays, emergency train stops, track maintenance, weather restrictions, and dispatcher decisions that cannot be predicted by external algorithms. This service must never be used as an official travel reference, safety dispatch system, or ticket booking authority. Always consult official channels of PT Kereta Api Indonesia (Persero) or relevant transit authorities for journey decisions.