The new LA Metro extension adds nine miles to the current 48.5-mile Long Beach to Azusa Metro A Line. Photo: LA MetroThe Los Angeles County Metropolitan Transportation Authority (Metro) celebrated the official opening of the extension of the Metro A Line to the cities of Glendora, San Dimas, La Verne, and Pomona, further extending the world’s longest rail line. The Metro A Line ProjectBuilt by the Foothill Gold Line Construction Authority and delivered on time and on budget, the $1.5 billion rail extension project will be operated by Metro. Built by the Foothill Gold Line Construction Authority and delivered on time and on budget, the $1.5 billion rail extension project will be operated by Metro. Each new Metro A Line station includes a multimodal public parking lot with easy pedestrian access and approximately 300 parking spaces each.