[MertsA]

The cap is 35 mph according to the link here: https://news.ycombinator.com/item?id=10558220

It looks like Google limited it to 25 mph on their own accord.

[jacobolus]

You are misunderstanding. They can drive on roads with 35 as a posted limit, but are limited to driving 25 mph themselves. The law sets the cap, not Google.

From https://www.dmv.ca.gov/portal/dmv/?1dmy&urile=wcm:path:/dmv_...

An NEV/LSV is a motor vehicle that:

- Has four wheels.

- Within one mile can reach a speed of more than 20 miles per hour (mph) but not more than 25 mph on a paved level surface.

...

Local authorities, by ordinance or resolution, may restrict or prohibit the use of NEVs/LSVs. An NEV/LSV may:

- Not be operated on any roadway with a speed limit above 35 mph.

...