
Alright, I just wasted a bunch of time I should’ve been working looking into this, and here is the HSRA’s most recent report on the subject: https://hsr.ca.gov/wp-content/uploads/2024/09/Sustainability-Report-2024-FINAL-A11Y-20240916.pdf
From the relevant section, pg 58:
With high-speed rail, the annual GHG emissions reductions are projected to be 0.6 to 3 million MTCO2e. based on 2024 Business Plan ridership models. This reduction is equivalent to the annual carbon emissions associated with the energy use of between 77,000 and 372,000 homes – more than the housing stock of San Jose. The cumulative reductions in well-to-wheels emissions over the first 50 years of operations are projected to be between 29 million and 142 million MTCO2e.
I wish they’d provided a percent reduction in vehicle emissions, but according to another source (https://ww2.arb.ca.gov/ghg-inventory-data), in 2023, transportation emissions in California were 137 million metric tons of CO2. The average of the range comes out to around 1.3% of that range.
That’s interesting. I wonder what fraction of transit emissions are from passenger travel across the state, vs commercial hauling and inner city traffic. I still think this is an obviously necessary step, but I’m curious what other actions are needed to take care of the other 99% of transit emissions. Perhaps urban public transit and bike infrastructure.











Real