How to travel down nob hill on the san francisco cable cars<br>Recognize the route system of the trolley in san francisco. The cable cars (or trolleys) run on three routes. Two of these routes begin at the powell & market turntable; they both run over nob hill.
Three cable car routes travel on powell street.
At least two of the routes travel on powell street, but the third route is uncertain. I think the model automatically assumes it is wrong if it is not mentioned.