In Jer-Z, we say "the parkway" and "the turnpike", but never use "the" when talking about numbered highways ("95", "Route 1", etc.).
The Central Valley is a different case, with the "Okie" influence being highly prevalent in places like Oildale and Taft.
I could never tell the difference between a “turnpike” and a “parkway”, except that “turnpike” is a very old term and indicates a toll road.
It would make sense that the Central Valley would have an Okie influence. However, I am only familiar with the Central Coast and Southern California.