Is there a signal for navigation throughout the journey from San Francisco to Monterey ?
3 Answers
The signal is very strong. There will be some impact when you go to major national parks (Yosemite where I went), but you can use Google offline maps without any problem.
There is a signal, but it doesn't matter whether there is one or not. This section is not very interesting.
One road, just drive along, with or without a navigation.