Click "View map updates for this product." This will tell you the latest version available for your device.If it matches the version currently installed on your Street Pilot c340, you don't need to download a new map.You can contact support for consumer products by calling 1-800-800-1020 or by clicking on the "Email Product Support" link, located in the resource section below.Due to the apparent amount of interest in this POI (172 downloads already) I figured it would be a good idea to get a forum topic going on it for additions or corrections.
I would love to have low bridges files to my GPS as i will start driving a truck soon. I stress the point of NOT using the US Low Underpass Clearances file as a warning system! Also, again, I take no responsibility for the use of this file nor guarantee its accuracy or completeness.
Updating your maps periodically ensures that the directions your device gives are always accurate. Visit the "Maps" page for the Street Pilot c340 from the Garmin website.
Turn on your Street Pilot c340 and navigate to the "Map Info Page." This page will tell you the latest map installed on your device. This page is located in the resource section below.
The Low Clearance Project thread will still be available to users to provide updated locational info or comments about the project.
Again, Thanks to all and especially Firenutts for "keeping it alive." Driven1 See also I've totally reworked the Low Underpasses file and I know that you'll find it in much better shape than originally posted.