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Consumer Reports: Phone apps at your service

Navigation apps that run on smartphones, such as Google Maps and Waze, put many in-dash units from car manufacturers to shame with their impressive voice control and real-time info on accidents, public transportation and speed traps. Many carmakers are surrendering part of their in-car interfaces in new vehicles to ones designed by Apple and Google. Those systems can access the Internet and your contacts, making them much smarter than traditional built-in navigation systems. Drivers of older cars routinely mount a phone onto the dash for similar reasons. Consumer Reports lists four apps with real-time info that ensures that you'll take the best route and steer clear of trouble. Apple...