How are the two speakers traveling?

M: Do you see any signs for San Francisco?
W: No. According to the map we should be close to the city, but the highway (公路) signs don’t say anything about San Fran cisco.
M: What city names do the signs show?
W: I see road signs for San Jose and Los Angeles. Do you think we’re lost?
M: Yeah, I think we’re going the wrong direction. I’m going to stop at the next gas station and ask the attendant for direction. I hope we can reach San Francisco before it gets dark.
W: Is San Francisco the capital of California?
M: No, it’s Sacramento.
W: Oh. I think I see a gas station up there on the right.
M: Great. I hope we haven’t gone too far out of our way.