Many of today's new cars offer in-dash GPS as an option, and some offer it as standard equipment. The earliest models were CD-ROM based and required multiple discs to cover the entire United States. Nowadays, any in-dash system worth its salt is DVD-ROM based, so maps for the entire country will usually fit on a single disc, two at the most. In-dash systems are usually more expensive than their portable counterparts, but they usually feature larger screens and integrate better with other vehicle electronics.
BMW and Acura were among the first to offer GPS navigation systems in select vehicles nearly 10 years ago, and now this technology is available on hundreds of models worldwide. BMW continues to offer on-board navigation with voice recognition and voice guidance on most of their new vehicles, with prices ranging from $1,800 and higher. Several car manufacturers have taken it a step further by taking real-time traffic and weather satellite updates and overlaying them on navigation maps, flagging trouble spots and providing constant updates of road closures, accidents, and delays.