The Most Popular Fast Food Restaurants in America

Americans love fast food. The top 15 fast food chains in the nation raked in a combined $115 billion in sales last year, and their 105,000 total stores blanket the landscape.We asked food industry research firm Technomic to put together a list of the biggest fast food brands in America. They're defined as LSRs — "limited service restaurants" — which include burger joints, sandwich shops,