L.A. Metro A Line Extension: Rail Project Success Story

LA Metro’s A Line extension opens, boosting rail service to San Gabriel Valley.

L.A. Metro A Line Extension: Rail Project Success Story
September 23, 2025 8:55 pm

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Introduction

On September 19, the Los Angeles Metropolitan Transportation Authority (L.A. Metro) launched passenger service on the A Line rail extension, spanning from Azusa to Glendora, San Dimas, La Verne, and Pomona in the San Gabriel Valley.

Project Details

The extension augments the existing 48.5-mile Long Beach-to-Azusa Metro Line A by 9 miles. This expansion reintroduces rail service to areas that have been without it since the Pacific Electric Railway Monrovia-Glendora line ceased operations in 1951, according to L.A. Metro officials.

Construction and Funding

The Foothill Gold Line Construction Authority oversaw the construction of the extension, which was completed on schedule and within the allocated budget of $1.5 billion. Construction activities commenced in 2020.

Financial Support

The project’s funding was sourced from Los Angeles County’s Measure R and Measure M transportation sales taxes, as well as the California State Transportation Agency.

Operational Management and Strategic Context

L.A. Metro is responsible for the operational management of the line. The launch of this extension represents the ninth completed project under L.A. Metro’s “Twenty-Eight by ’28” initiative, designed to improve regional transit services ahead of the 2028 Olympic and Paralympic Games in Los Angeles.

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Conclusion

The Los Angeles Metropolitan Transportation Authority (L.A. Metro) has initiated passenger service on the A Line rail extension, increasing the line’s length and restoring rail access to several communities. The project, constructed by the Foothill Gold Line Construction Authority, was completed within budget and is part of a larger initiative to enhance regional transit.

Company Summary

Los Angeles Metropolitan Transportation Authority (L.A. Metro): Operates the A Line rail service and is responsible for the management of the new extension. It is also driving the “Twenty-Eight by ’28” initiative.

Foothill Gold Line Construction Authority: Managed the construction of the A Line extension.

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