2026年8月4日
A speed alert the driver does not switch off after ten minutes
A 3 km/h hysteresis band, cooldowns of 30/20/12 seconds, and one important exception: an escalation speaks immediately.
開発ノート
Engineering notes
読む
2026年7月9日
When the map has no sign: inferring speed limits under Circular 31/2019
The OpenMapTiles schema carries no maxspeed tag. With free tiles, close to 100% of limits must be inferred — and here is where that inference can be wrong.
2026年6月18日
The head unit reports zero speed while the car does 60
Location.hasSpeed() returns true and the value is 0.0 — forever. Why this is so common on aftermarket Android units, and how the app detects it.