Nav question

The accuracy of the Prius NAV is just as good as your Garmin. What you are experiencing is the map database. Toyota and Garmin use different companies for their map data. Garmin's is better in some areas, Toyota's in others. Street numbering is one of the areas where map information is often in error, as there is no solid base for street numbering systems.

Tom

 

Welcome to PriusChat, SKPLLC! I presume you know where your home is, so when setting the Home destination, use whatever you like that's nearby if you don't want to use the location of your car in the driveway.

Of more concern is whether your Prius nav is accurate at street intersections. How's that looking?

 

My 2005 is perfectly accurate. 40+ house numbers is unheard of in my experience... Mine is accurate to within inches to feet. Give more details.

 

Now you've mystified us, Steve.

 

The street number comes from the map database. As posted earlier, these are often in error, and usually involve some heuristics relating to starting and ending street numbers.

The Toyota NAV system does not speak upcoming streets. The names are displayed as text for upcoming turns, but not spoken aloud.

Tom

 

I purchased a new Prius in April. The navigation system is constantly taking me off the expressway and placing me on rural routes. Recently it took me off the ramp and had me get back on. I went to the dealer and they gave me no advice.
I'm a real estate agent and really depend on the accuracy of the system.
I will always have my Garmin in the car as a back up.
Do these navigation systems have to be updated?
Mary

 

Most likely it's because of the routing options you have selected. If you select the shortest route it will do exactly that: take you off of the highway and onto the shortest goat path that connects points A and B. Also, you can select routing options that exclude the interstate system.

Updates are available from Toyota, but they charge a lot for them. They come as a new DVD that is inserted into the NAV box under the driver's seat.

Tom

 

I've often found that NONE of the 3 route choices that the Nav gives are particularly good. Seems that the system wants to use ONLY interstates or ONLY local roads - but rarely a sensible combination of state highways and Interstates that result in the quickest driving time (yes, I have my average speeds on State and Interstate set to reflect the speeds I actually drive). I all too often end up adding artificial mid points to force the system to plot an optimum route.

 

I have a Garmin Nuvi and the built-in system. I like the Toyota system better than the Nuvi. That's not to say that I wouldn't like to cherry pick the best features from both systems.

Tom