According to this LA Times story.  There’s nothing particularly remarkable about that — quite a few buildings and highways in the US are named after former presidents; we only mention it because of this paragraph:

Caltrans will now do a cost estimate for the signage. The cost of signs for naming other stretches of freeways in honor of public figures has ranged from $3,000 to $7,000.

Compare that with the $100,000 that the KCDC is reported to be spending on renaming the old SH1…