Newbie asks: (how many POIs, etc.)

I have a NUVI 760.
...I just got caught in a speed trap in Prescott Valley, Ariz. In this case my NUVI 760 AND my speedometer both said I was doing EXACTLY 35mph

1. There is, but I do not recall. I have over 700,000 custom POIs installed.

Custom pois don't take much space.

I have a NUVI 760.
I just did my very first POI download/install. It was the Red Light/Speed camera ones. That leads to these questions which I hope you more experienced guys can answer:
1. There must be a limit as to how many POI's you can add. The Red Light/Speed camera ones totaled approximately 3,300 POI's. Am I approaching the limit?

No you aren't approaching the limit. I think the limit would be set by the amount of unused memory, when you run out of memory you have reached the limit.

2. If I get carried away and download lots of POI files, for instance, say, all the ones that appear to be campgrounds in the western US, Elks Lodges, rest areas, etc. am I asking for trouble? Will the GPS screen become cluttered? Will I be inundated with proximity alert messages?

Yes, no, maybe. I have two files on my GPS that are huge. They are all of the railroad grade crossings in two states. I have Redlight and Speed camera files, etc. My last upload using POI Loader showed around 30,000 files. In certain areas and at certain zoom settings, I get a lot of icons showing up but most of my POI files are for finding stuff. They don't set alarms or alerts.

3. About the SD card slot. If you insert a blank, formatted, SDHC card, say a 4GB card, does that add to the storage capacity for POI's?

Again, yes and no. The SD card will add to the available memory but the unit will treat it as an expansion card, not an addition to its internal memory. You can put POI's, mp3's and jpg's on the card and the GPS will find them and use them just as it does files loaded into it's internal memory. But you have to load them onto the SD card by manual choice. The GPS won't decide to store files on the SD card by default. You can have POI files stored on the SD card and in the internal memory and the GPS will use both of them.

4. To change the subject just a little, do you think that in the fairly near future Garmin will offer a GPS that has Red Light/Speed camera info built-in?

I don't think so, the files change every week and updating the dedicated POI files is a pain.

I ask about the Red Light/Speed cameras because I just got caught in a speed trap in Prescott Valley, Ariz. In this case my NUVI 760 AND my speedometer both said I was doing EXACTLY 35mph. I knew I was in a speed trap area and was doing exactly the posted speed. The ticket said approximately 47mph. I had a hearing and explained there must have been a glitch, because I (and my wife who was a passenger) knew I was doing exactly 35. Guilty said the judge.
I'm looking forward to your info and suggestions.

Custom pois don't take much space.

I have a NUVI 760.
I just did my very first POI download/install. It was the Red Light/Speed camera ones.

Reply:

Keep in mind that the alerts for red light cameras goes off 1/4 mile from the camera. In a populated area like New York it could be a block or two over and the alert will go off.

A few friends have said that they were driving on the highway and the red light camera alert went off. The cameras were on local streets nearby.

It is better to be safe than sorry but you might want to change the alert distance depending on your circumstances.