1. Add a keyword (eg: redlight or speed) to the CSV filename.
2. Use the "manual" mode in POI Loader to specify proximity or speed.
3. Add @50, @60, or any other number representing actual speed limit to the end of select POI file name OR for each POI
4. Convert CSV to a GPX file and adjust proximity and/or speed setpoint for each POI
5. Use the advanced TourGuide technique
Knowing this, you'll be able to turn off your alerts.