Many people listen to CDs or cassette tapes when they are driving. However, freeway condition is only broadcasted through the radio. By listening to CDs or tapes only, the driver would miss out on what is happening to the traffic condition in the area.
My idea is to have the in-car stereo system pick up the most recent traffic report from a user-designated radio station. This info is recorded in the stereo system using a simple memory, which writes over any previous recorded info. The most recent traffic info, if changed, will be played back as an intermission between songs on the CD or the tape, or whenever the driver chooses, i.e. periodically or on-demand. This way, the driver can still enjoy the CD, without missing out on critical traffic information from the radio.
Better yet, the stereo system can always pick up traffic updates from a designated radio station and store that in the memory. The info can be played back whenever the driver demands, whether the driver is listening to a CD, tape or other radio stations.
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This is standard practice for the clogged roads in Europe where clogged roads are a daily reality....When companies start selling this in the US, probably a good time to start stimulating car-pooling and more public transportation???
Blaupunkt has the exact system at work with their car stereos. Some cars makers buy their OEM equipment from them so you can find that as a standard too. It's a tiny blue button that memorizes the last traffic announcements (usually on every 30 minutes) and plays them as the drivers chooses.
My car audio system disrups the playback of a CD and plays the announcements, or if you mute the radio altogether switches it on when the anouncements start. I hope I remember correctly that the signal to make this happen is called ARI...