
Open letter to Davis BTSSC (Transportation Commission)
To: Chair Jessica Jacobs and members, Davis BTSSC
From: Alan ‘the Lorax’ Hirsch
RE: Potential Endorsement of I-80 Yolo widening before Draft EIR released
BTSSC will be asked tonight (item 6b) to endorse a letter to partner with Caltrans to endorse I-80 widening by supporting a new and untested program of mitigation that could negate local cities’ greenhouse gas reduction programs (CAAP/CAP).[i]
You will be asked to sign before even seeing the draft Environment Study (DEIR) or the mitigation plans. This is not due out for 30 days.
I urge caution based on the study by Professor Susan Handy’s group at UC Davis Institute of Transportation Studies. (ITS)
The below bar chart from that UCD ITS study[ii] compares induced travel projections by Caltrans to the forecast by the National Center for Sustainable Transportation model. Caltrans’ lower forecasts in the EIRs were used to justify spending hundreds of millions of dollars on these five projects. The study shows Caltrans consistently understates the amount of travel & GHG to be mitigated. And in two projects Caltrans assumed no induced demand.
Induced demand has been accepted science in the transportation world for over thirty years now. The science was upheld in the 1990 California case Citizens for a Better Environment vs Deukmejian, et al. [iii] It was an inconvenient truth Caltrans has worked three decades to get around. It was not until the beginning of 2020 after the 2013 passage of Bill SB 743[iv] that EIRs had to focus on reducing Vehicle Miles Traveled (VMT).
Caltrans has been in denial of the science on traffic, which has been confirmed by hundreds of studies out of UC Davis, UC Berkeley, and the Texas Transportation Institute, among many other places worldwide.[v]
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