{
  "$type": "site.standard.document",
  "description": "A navigation device includes a determination means which determines whether or not to activate tunnel mode function based on characteristic data of the tunnel read from the database, a vehicle speed detected by the vehicle speed detection means and a vehicle position detected by the vehicle…",
  "path": "/patents/1111319",
  "publishedAt": "2001-08-01T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60H1/00771",
    "MITSUBISHI ELECTRIC CORP [JP]"
  ],
  "textContent": "A navigation device includes a determination means which determines whether or not to activate tunnel mode function based on characteristic data of the tunnel read from the database, a vehicle speed detected by the vehicle speed detection means and a vehicle position detected by the vehicle position detection means, and a control means which displays characteristics of the tunnel to be travelled through on a display means based on a command signal from the determination means to activate the tunnel mode function and which activates various on-vehicle devices in the tunnel mode function.",
  "title": "NAVIGATION DEVICE"
}