North County San Diego’s coastal commuter and inland regional rail network.
Overview
COASTER (Coast Express Rail) and SPRINTER are passenger rail services operated by the North County Transit District in San Diego County. Together they link coastal communities, inland North County, employment centers, colleges, regional transit hubs, and the broader Southern California passenger rail network.
COASTER provides locomotive-hauled commuter rail service between Oceanside and downtown San Diego. SPRINTER provides east-west regional rail service between Oceanside and Escondido using self-propelled diesel multiple units.
Quick Facts
| Operator | North County Transit District |
| Major Hub | Oceanside Transit Center |
| COASTER Route | Oceanside to downtown San Diego |
| SPRINTER Route | Oceanside to Escondido |
| COASTER Startup | February 27, 1995 |
| Original COASTER Power | Five Morrison-Knudsen F40PHM-2C locomotives, 2101–2105 |
| Current COASTER Power | Siemens Charger SC-44 Tier 4 locomotives |
| SPRINTER Equipment | Siemens Desiro VT642 diesel multiple units |
| Connections | Amtrak; Metrolink; San Diego Trolley; regional buses |
North County Transit District
NCTD operates COASTER, SPRINTER, and connecting bus and specialized transportation services throughout North San Diego County. Its two rail systems use different equipment and operating models while meeting at Oceanside Transit Center.
COASTER
Origins
COASTER began service on February 27, 1995, over the coastal railroad between Oceanside and San Diego. The line follows the historic Santa Fe Surf Line and forms part of the modern LOSSAN Corridor.
Route
- Oceanside
- Carlsbad Village
- Carlsbad Poinsettia
- Encinitas
- Solana Beach
- Sorrento Valley
- Old Town San Diego
- Santa Fe Depot
Oceanside Transit Center
At Oceanside, COASTER connects with Amtrak Pacific Surfliner, Metrolink Orange County Line, SPRINTER, and local and regional buses. Oceanside is one of the corridor’s busiest multi-operator stations.
COASTER Equipment History
The Original F40 Fleet
COASTER began with five distinctive F40PHM-2C locomotives numbered 2101 through 2105. Morrison-Knudsen rebuilt and configured the locomotives for the new commuter service, and the fleet became the visual identity of COASTER during its first quarter-century.
The locomotives entered service with the opening of COASTER in 1995 and worked the coastal corridor between Oceanside and San Diego. NCTD records identify 2103 as part of the inaugural fleet and show that it remained in service until February 2021.
Replacement by Siemens Chargers
NCTD approved the purchase of five Siemens Charger SC-44 locomotives in 2018 to replace the five F40s. The Tier 4 Chargers entered the fleet as lower-emission replacement power. Additional Charger orders expanded and completed the conversion of the locomotive fleet.
The Siemens equipment provides modern controls, diagnostics, push-pull capability, and Tier 4 emissions performance. The change marked the end of the original F40 era but preserved the locomotive-hauled character of COASTER service.
Grant Requirements and Disposition
The replacement program used state and regional funding, including a Carl Moyer air-quality grant. That grant originally required the retired F40 locomotives to be scrapped. The grant conditions were later modified so that retired locomotives could be preserved once their diesel engines were destroyed.
All five retired F40s were donated to the Pacific Southwest Railway Museum Association. The Campo museum selected locomotive 2103 for its collection, and Michael Armstrong, known on YouTube as @CoasterFan2105, led the effort to find another preservation home for 2105. The remaining locomotives, 2101, 2102, and 2104, were scrapped, and the scrap proceeds were used to cover storage costs.
COASTER 2103 at Campo
Locomotive 2103 was moved by freight train to National City and then by truck to the Pacific Southwest Railway Museum in Campo. Its preservation maintains a physical link to the start of COASTER service and to the modern railroad history of San Diego County.
COASTER 2105 at Perris
The Pacific Southwest Railway Museum transferred locomotive 2105 to the Southern California Railway Museum. The locomotive arrived at Perris in May 2025 and is preserved as a non-powered control unit. It remains identifiable as an F40PHM-2C and represents the original COASTER fleet in the museum’s Southern California collection.
Why the F40 Fleet Matters
The five F40 locomotives defined COASTER’s startup era. The preservation of 2103 and 2105 connects the modern commuter railroad with two major Southern California railway museums, while the loss of the other three locomotives underscores the importance of timely equipment preservation.
SPRINTER
A Different Type of Railroad
SPRINTER functions as an east-west regional rail service between the coastal main line at Oceanside and inland North County. Its service pattern and self-propelled equipment differ from COASTER, Amtrak, and Metrolink.
Route
- Oceanside
- Vista
- San Marcos
- Escondido
Siemens Desiro Equipment
SPRINTER uses Siemens Desiro VT642 diesel multiple units. These self-propelled trainsets provide rapid acceleration, bidirectional operation, and frequent-stop service without a separate locomotive.
Oceanside: Where the Systems Meet
- Amtrak intercity service
- Metrolink commuter rail
- COASTER commuter rail
- SPRINTER diesel multiple units
- BNSF freight and maintenance activity
Relationship to the LOSSAN Corridor
COASTER shares the coastal corridor with Amtrak Pacific Surfliner and BNSF freight operations. Capacity, reliability, double-tracking, station projects, and coastal resilience therefore connect COASTER with the larger LOSSAN planning story.
Modern Transit Connections
- Amtrak Pacific Surfliner
- Metrolink Orange County Line
- NCTD bus services
- Regional and local buses
- San Diego Trolley
Preservation and Related Museums
- Pacific Southwest Railway Museum in Campo: COASTER 2103
- Southern California Railway Museum in Perris: COASTER 2105
Why COASTER / SPRINTER Matter
- Connect coastal and inland North San Diego County
- Provide two distinct models of regional passenger rail
- Link with Amtrak, Metrolink, trolley, and bus systems
- Preserve passenger rail on historic railroad corridors
- Document the transition from first-generation F40 power to Tier 4 Siemens locomotives
- Provide a distinctive example of modern DMU service
Related Railroads
Related Locations
Related Routes
- LOSSAN Corridor
- Surf Line
Gallery
Photo gallery coming soon.
- Original COASTER F40 fleet
- COASTER 2103 at Campo
- COASTER 2105 at Perris
- Siemens Charger locomotives
- COASTER passenger equipment
- SPRINTER Siemens Desiro DMUs
- Oceanside Transit Center
- Coastal and inland stations
- LOSSAN Corridor operations
- Historic-modern equipment comparisons
Western Rail Archive Notes
The final page should treat COASTER and SPRINTER as distinct railroads under one operating agency. Future WRA equipment pages will cover F40PHM-2C locomotives, Siemens Chargers, passenger cars, and SPRINTER DMUs. The COASTER equipment story should connect the startup fleet, Charger replacement program, funding restrictions, and preservation of 2103 and 2105.
Archive Status
| Page Status | Category | Type | Gallery |
|---|---|---|---|
| Foundational Article | Railroads | Commuter / Regional Rail | In Development |