Operators have been able to build loyal clientele using familiar parking spots, social media, and after-dark hours. Popularized in Los Angeles, Loncheras are often characterized by rough exteriors, bright colors, and bold murals. Mobile restaurant in California Tacos al pastor at Leo's Taco Truck, Los Angeles, CaliforniaĬolloquially referred to as Loncheras, Taco trucks have become an iconic symbol of Mexican culture in the United States.