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I have a Garmin GPS navigator. It warns me of school zones and fixed speed cameras, and advises me of the prevailing speed limit. It has some strange things going on, though.

For example:

It warns me about (fixed) speed cameras that don't exist.

It has several different modes of operation in regard to school zones: warning, warning + speed limit change, speed limit change with no warning.

It warns me about school zones that are not signposted as school zones, and sometimes doesn't warn me at all about school zones that are signposted.

It advises the incorrect speed limit of some roads. It advises incorrect speed limits on odd sections of the same road.

There is a section of the Western Ring Road (Melbourne) that the Garmin insists is 90k speed limit (it's definitely 100kph), and then warns me of a (non-existant) 100kph fixed camera - WTF!

Just wondering if this was someting peculiar to the Garmin units, or is it a problem with units that use Whereis maps.

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Fixed speed cameras - they are not on the whereis maps from what I know the GPS manufacturers do custom versions of where they are located *or* you can download free versions

Speed limits, the data is not accurate, the government said it would get fixed over the next 2 years, so expect incorrect speed limits all over the place.

the speed limit comes down to what the maps were written as being. when i go down the coast mine says 1 stretch of road is 50kmh but it is actually 90. also the highway has been 90kmh for a few years now and it still says it's 100. i don't get warnings of school zones or speed limit changes on mine (some roads it shows the speed limit down the bottom and it will change when i hit a new speed zone, but no warning). i also get random warnings of "safety camera area". once got this warning in my driveway, LOL.

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