San Diego MTS Secures $48.3 Million Orange Line Track Improvements
San Diego MTS secured $48.3 million from California for Orange Line track improvements, with construction beginning in July.

SAN DIEGO, CA – The California State Transportation Agency has awarded the San Diego Metropolitan Transit System (MTS) a $48.3 million grant for the second phase of improvements on its Orange Line trolley track. The funding comes from the state’s Transit and Intercity Rail Capital Program (TIRCP). Construction on the 18-mile corridor is scheduled to begin in July.
How Is the Funding Structured?
The grant is designated for Phase 2 of the Orange Line Improvement Project, focusing on enhancing safety, reliability, and achieving a state of good repair. The scope includes upgrades to grade crossings, the installation of new universal interlocking crossovers, and the replacement of outdated signal interfaces. This work builds upon the first phase of improvements, which was funded by a previous TIRCP grant awarded in 2022.
Key Funding Data
| Parameter | Value |
|---|---|
| Fund / Programme Name | Transit and Intercity Rail Capital Program (TIRCP) |
| Total Value | $48.3 million |
| Parties Involved | California State Transportation Agency (CalSTA), San Diego Metropolitan Transit System (MTS) |
| Timeline / Completion | Construction begins July; Final completion date not disclosed |
| Country / Corridor | USA / San Diego Orange Line |
How Does This Compare to Similar Funding Programs?
This $48.3 million award for MTS is a component of a much larger $848 million funding package allocated by the California Transportation Commission for rail projects. Within the same package, the Bay Area Rapid Transit (BART) system received $100 million for a 5-mile tunnel project, highlighting the state’s dual investment in both system maintenance and major expansion. (Source: California Transportation Commission, 2024). The cost of state-of-good-repair projects like this one is minor compared to new builds; for instance, the proposed extension of the K Line in Los Angeles is estimated to cost between $11 billion and $15 billion. (Source: LA Times, 2024).
Editor’s Analysis
The MTS grant underscores a wider public funding trend prioritizing infrastructure maintenance and renewal over new capacity projects. This focus on “state of good repair” is critical for enhancing system reliability and safety, which are key factors in retaining existing riders and attracting new ones. This strategy mirrors trends seen elsewhere, such as in the UK’s road funding plan, which also emphasizes maintenance over expansion to maximize the value of existing assets. (Source: Construction News, 2024). For sprawling urban regions like Southern California, improving the core network’s dependability is a foundational step before larger, more costly expansions can effectively draw drivers from their cars.
FAQ
Q: What specific work will the $48.3 million grant fund?
A: The grant funds Phase 2 of the Orange Line improvements, covering 18 miles of track. Work includes grade crossing safety enhancements, new universal interlocking crossovers, and the replacement of aging signal interfaces.
Q: Is this grant part of a larger funding initiative?
A: Yes, this award is part of an $848 million state-wide allocation by the California Transportation Commission for various rail projects. This same initiative also provides $100 million for a new BART tunnel in the San Jose-Santa Clara corridor.
Q: When will the Orange Line improvement project be finished?
A: Construction is scheduled to begin in July. However, an official completion date for the full scope of work has not been disclosed by the San Diego MTS.




