What did Harley Brinsfield do that paved the way for Subway?
Harley Brinsfield:  With his second wife, Arlene Levy Brinsfield, he opened Harley Submarine Sandwich Shops, which, largely due to the publicity generated by his show, became one of the first and largest local fast food franchises pre-dating both McDonald's and Subway by many years. Subway (restaurant): Subway is a privately held American fast food restaurant franchise that primarily sells submarine sandwiches (subs) and salads. Subway is one of the fastest-growing franchises in the world and, as of June 2017, has approximately 45,000 stores located in more than 100 countries.
became one of the first and largest local fast food franchises