A device for informing to a driver a speed limit set for an own lane included in a multi-lane road is installed in a navigation system mounted on an automotive vehicle. The device includes a road surface camera for taking pictures of the speed limit painted on a road surface and informing devices such...http://www.google.es/patents/US8138947?utm_source=gb-gplus-sharePatente US8138947 - Speed limit informing device installed in on-board navigation system
Speed limit informing device installed in on-board navigation system
