Carlsbad Rail Construction to Resume This Weekend

Caltrans and SANDAG crews return to Batiquitos Lagoon on October 24 for critical rail infrastructure improvements.

Updated on Oct. 23, 2026 in Construction

Isometric editorial illustration of parallel railroad tracks leading toward a bridge over a coastal lagoon, representing regional infrastructure improvements. — Caltrans and SANDAG crews are scheduled to resume work on the Batiquitos Lagoon Double Track project in Carlsbad this weekend, October 24. AI Illustration. Upload story photo >

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Crews from Caltrans and SANDAG will return to the Batiquitos Lagoon in Carlsbad this weekend to continue work on the Batiquitos Lagoon Double Track Project. The construction is scheduled for October 24 and 25, 2026.

Why it matters

The project aims to significantly increase the reliability, capacity, and operational flexibility of the critical LOSSAN rail corridor. By replacing aging infrastructure, the initiative also seeks to modernize regional transportation links.

The construction window runs from 10 p.m. Saturday to 4 a.m. Sunday. This work supports the replacement of an 80-year-old wooden trestle bridge with a contemporary steel-and-concrete structure.

The players

Caltrans

The California Department of Transportation is the state agency responsible for designing, building, and maintaining the state highway system and various rail corridors.

SANDAG

The San Diego Association of Governments serves as the regional planning agency for the San Diego area, overseeing transportation and infrastructure development.

The details

Workers will focus on rail destressing south of the La Costa Avenue overcrossing to ensure tracks can properly expand and contract with temperature shifts. The broader project adds a second track spanning from Avenida Encinas to La Costa Avenue, designed to widen lagoon channels for improved tidal and flood flow.

Construction occurs from 10 p.m. Saturday, October 24, through 4 a.m. Sunday, October 25, 2026.

Market Landscape

This project follows a pattern set by the LOSSAN Rail Corridor Strategic Implementation Plan to modernize coastal transit reliability. Such efforts remain central to the broader regional strategy of expanding capacity and operational flexibility across high-traffic rail sectors.

Residents should expect potential noise or localized disruption during the overnight work window from Saturday to Sunday morning. These improvements are intended to support long-term rail capacity and local environmental flood management for the lagoon area.

The takeaway

The work ensures that essential regional rail links can handle modern transit demands while protecting natural lagoon channels. Local travelers and residents can expect ongoing infrastructure upgrades as the project moves toward its goal of enhanced flood flow and rail efficiency.