San Diego Regional Transportation Plan Shifts Away From Big Projects to Focus on Improving Existing Infrastructure

SANDAG’s 2025 Regional Plan scales down plans for new rail lines in favor of expanding rapid bus service.

1 minute read

February 13, 2026, 8:00 AM PST

By Diana Ionescu @aworkoffiction


Red San Diego light rail train with people visible inside.

Erik Clegg / Shutterstock

The San Diego Association of Governments (SANDAG) issued its 2025 Regional Plan, outlining spending priorities for the next four years.

As Jake Gotta explains for KPBS, “This new plan retreats from some of the high expectations and big ideas from the 2021 Regional Plan, including the proposed Purple Line and an airport trolley. Instead, SANDAG is focusing on improving systems that already exist today.”

SANDAG leaders say the approach is scaled down to align with funding  and focus on projects that are achievable in the shorter term, such as expanding the region’s bus rapid transit network with 40 new routes. “The Regional Plan also incorporates a Sustainable Communities Strategy (SCS) as required by state law. A primary goal of this SCS is to reduce greenhouse gas emissions by 19% by 2035 compared to a 2005 baseline.”

The agency plans to spend over $72 billion on transit including the San Diego Metropolitan Transit System (SDMTS) bus and trolley service, North County Transit District (NCTD) COASTER, SPRINTER and BREEZE busses, and building or improving infrastructure for those agencies’ routes, including the LOSSAN corridor on which Amtrak’s Pacific Surfliner operates. The plan also includes $5.5 billion for bikeways and $206 million for microtransit.

Monday, February 9, 2026 in KPBS

Young Professional

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban and Environmental Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban and Environmental Planner

Get top-rated, practical training for planners

Overlapping highways

The state-sanctioned urbicide of Austin

People don’t kill cities. Freeways do.

September 8, 2026 - Benjamin Schneider

The Hoover Dam blocking the Colorado River. The river's water level is noticeably low. The cliffs surrounding the blue water are brown and jagged.

US to reduce Colorado River water deliveries to Mexico

A new Colorado Treaty amendment reduces Mexico’s Colorado River water allocation by 250,000 acre feet.

September 11, 2026 - The Arizona Republic

Skyscrapers in Jersey City.

New Jersey’s second-largest city bans standalone data centers

Jersey City will continue to allow co-location facilities, such as those meant for research institutions that store their own data.

September 4, 2026 - The Cool Down

A New Jersey train approaches people waiting at the station.

Amtrak not solely to blame for New Jersey commuter rail's unreliability, report finds

A new study from the Garden State Initiative found that NJ Transit’s budget grew 20% across a 4 year period, but reliability declined significantly over the same period.

September 15 - Mass Transit

A tall, gray power plant billows smoke into a blue sky.

EPA erases limits on planet-warming pollution from power plants

Under Monday’s plan, power plants would still have some limits on how much mercury, arsenic and other contaminants they can emit.

September 15 - New York Times

A white RAPID bus. The lower half is light blue, and says RAPID in purple text. The bus is half visible, appearing from the left side of the image.

Phoenix announces new on-demand transit service, more frequent RAPID buses

Both new services will launch in October, and are part of Phoenix's Project Effective Access Solutions for Easing Congestion.

September 15 - KJZZ

FREE Course: Walkable City 1: Why Walkability?

After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.

Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold

The course focuses on the opportunities and imperatives that shape reinvention of mall sites.