GPS Speed Is Device-Based
Your phone estimates speed from its own location changes. Official train systems may use onboard sensors, railway systems or operational data instead.
Timetable Speed Is Different
A timetable may describe average journey speed or scheduled travel time. Your live GPS speed changes every moment as the train accelerates, slows or stops.
Signal Quality Matters
If GPS accuracy drops, the browser reading may update slowly or briefly differ from expected train speed. This is normal in tunnels, stations and dense areas.
Use It as a Helpful Estimate
Train Speed Test is best used as a quick passenger tool for curiosity and trip tracking. It should not be treated as official railway data.