California's in-use locomotive regulation - International Council on Clean Transportation

Summarizes how a regulation recently approved by the California Air Resources Board will push railroad companies to use cleaner locomotives and eventually achieve zero-emission operations in the state.

Characterizing Fuel Use and Emission Hotspots for a Diesel-Operated Passenger Rail Service

Hydrogen on track to replace diesel locomotives

Policy update - International Council on Clean Transportation

Locomotive Fact Sheets California Air Resources Board

Chapter 4 - How Do Public Policies Affect the Freight Transportation System?, Impacts of Public Policy on the Freight Transportation System

In a Rural Corner of the West, a Local Level Push to Revive Passenger Rail - Route Fifty

BNSF Going BIG in Barstow (Updated With Commentary) - Railway Age

What I Learned When I Drove a Vintage Steam Train - Bloomberg

Caltrain Modernization Program - Wikipedia

Caltrain HSR Compatibility Blog: Freight on the Peninsula

Funding for LA transit and port in infrastructure bill

When it comes to climate change, Amtrak is stuck in a catch-22

Transit, EVs Make California First in US For Climate-Friendly Transportation - Bloomberg

Should sales tax be increased to fund transportation projects? Sacramento County Measure A, explained.