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Posted by ps56k on May 13, 2008, 5:20 pm


spacecadet wrote:
>>> I am also new to gps and the Nuvi 750 is my first. For the most
>>> part, I am amazed at how smart it is. Many times it has outfoxed
>>> me. I have noticed that on occasion it has put an address on the
>>> wrong side of the road. Yesterday I was in downtown Milwaukee, WI,
>>> where an extensive revamp is underway of the Marquette exchange.
>>> Nuvi 750 tried to direct me to old left turn off ramps which no
>>> longer exist and are/will be replaced with conventional right off
>>> ramps. This is a 2-4 year project. No idea how many years left. One
>>> would think that gps mapping would take major roadwork into
>>> consideration and plan releases accordingly.
>>> Once in downtown Milwaukee, I was routed to a bridge which is out.
>>> On the way out of town, I was routed to a ramp that is closed.
>> Mapping is updated about every 12 to 18 months. Garmin does not make
>> the maps, but buys them from a third party. Taking major road
>> construction into consideration means updating every day or never.
>> There are practical limits. Every state has a few projects working
>> at any given time. Do you put in the new locations that are not open
>> yet, or the old ones that may or may not be closed on a given day?
>> No matter what answer you give, it is wrong at any given time when
>> the changes are implemented.
>> As for the bridge out and ramp closed, how long has than been and is
>> it temporary or permanent? Ramps close and re-open every day so it is
>> impossible to keep up on a regular basis.
>> The companies that make the maps do have full time crew out on the
>> roads doing the mapping and making changes. They film the routes
>> also to be sure road signs correspond with reality too.
>> You are correct about human intervention. Seems as though some
>> people buy the nav devices and think they no longer have to look out
>> the window.
> I don't know, Microsoft Streets and Trips which is an admittedly a PC
> based GPS program will tell you that the road data is out of date and
> will update it via the internet.
> Garmin could do that via WebUpdater..

We were just up at Marquette, and did ok with our Garmin Nuvi 260.
I think it was a combo of the Garmin + instructions from the school website.

Ran into the same issues on I-294 just west of Chicago, (also I-355 new
south extension),
with the ongoing tollway construction and ramps closed, gone, moved, etc.

I belive that TomTom has a user feedback & update capability
to handle those ongoing types of situations - ramps closed, detours, etc.