New Toyota cars will have up-to-date map and traffic information for electronically determining the quickest routes in an upgrade of network-linking technology now offered mostly in luxury models.

The service, scheduled for rollout next month only for Japan, includes "map on demand," which constantly updates data about the nation's roads in navigation equipment through a mobile download, Toyota Motor Corp. said Tuesday.

The service, an upgrade of the G-Book services that Toyota started five years ago, will be offered in all new models.