With Garmin you can have a POI file or dataset with a name such as redwood@55 - give it a proximity zone of 1 KM (or .5 miles) and your GPS will warn when you exceed 55 (Mph or Km/H) as you enter the proximity zone for that POI.
Does TomTom have a similar capability in it's POI's?
Does TomTom have a similar capability in it's POI's?