In the mid-20th century, there were 40,000 drive-in restaurants across America, complete with intercoms for ordering and carhops who brought out food on steel trays. They were the beating heart of the US's emerging car culture. But today, there are only a handful of family-owned drive-ins left in America. Superdawg is Chicago's last remaining one. Its carhops ferry out its famous "dawgs" 362 days a year. An hour north, the Miller family has kept the Dog N Suds name alive thanks to foot-long hot dogs, classic car cruise nights, and homemade root beer. Chief correspondent Abby Narishkin visits these two legendary spots to see how they've kept cars pulling into their lots and what the future might hold for the dying drive-in. 00:00 - Intro 01:09 - Chicago's Last Drive-In 03:00 - The Superdawg 06:20 - 1950s Intercoms 08:26 - History of Superdawg 09:53 - Carhops 11:09 - Superdawg Taste Test 13:28 - The Rise of America's Drive-Ins 15:39 - Dog & Suds 16:33 - The Fall of Drive-Ins 18:24...