In the mid-1930s, GM worked hard to create the impression of a nationwide trend away from rail. But there was no trend. Buses were a tough sell. They jolted. They smelled. They inched through traffic. City by city, it took the hidden hand of General Motors to replace streetcars with Yellow Coach buses. In 1936, a company was founded that would grow to dominate American city transportation. National City Lines had no visible connection to General Motors. In fact, the director of operations came ...