The Phoenix Arizona area map seems to have some problem.
For instance, driving from corner of East Hancock Avenue and North Scottsdale Road in Scottsdale. To East McDowell Road and North Scottsdale Road. Will give me the option of two routes, each 1.3 miles, on the same road. One route will tell me 10 times to "Continue Straight Ahead". The other route will tell me 14 times to "Continue Straight Ahead". I don't live in Phoenix, I visit there for about a week in the spring and drive all over the city to spring training baseball, relying on the GPS to get me to places. This same thing happens all over the city, it'll just about drive you crazy. There is the option for "Detailed navigation", but it's not set.