If the current impacts of climate change on California continue for the next 5 years, I expect the ban will be moved forward not delayed. Having to spend weeks at a time indoors looking out at a muted orange sky with no sun has had a sobering effect on most vocal climate change deniers. Considering this issue has been getting increasingly worse over the past 10 years, I suspect voter support for climate action will increase.
I do agree about limiting the size of roads though.