In my experience as a driver, here are my top 5 POI databases
for you to download for your GPS. (Free & paid).



Speed cameras
gps-data-team.com/poi/united_states/safety/Speed_Trap.html


Low clearances
lowclearances.com


Truck stops
poifriend.com/poigroup.php?poigroup_id=6749


Gas stations
gps-data-team.com/poi/united_states/petrol/


Walmart
poifriend.com/poigroup.php?poigroup_id=406



I have all of these installed and they all work really well.

Safe driving.

› See More: Top 5 POI data bases for GPS - Worth checking out.