Ok, there are two ways that alerts can be created under Garmin POI record.
1. With speed=0 (or no speed) then alert is trigger when in range; alert message displayed the name of alert
2. With speed<>0 (with a speed) then alert is trigger when in range AND over the speed; alert message is built-in
Since sectional alert deal with average speed; having it trigger based on the speed doesn't really make sense.
Putting multiple trigger points for sectional makes more sense because it remind the driver. If created with speed=0, I can have alert message to be something like: "Alert: Section/Average Speed at XX kph for YY m left" If created with speed=XX, you'll get the built-in alert message of something like: "XX km/h Speed Alert Ahead"
Now since US don't have any sectional alerts, it doesn't matter to me; but for you folks that have to deal with it, which way is better for you? Personally, I think having meaningful alert message is better.
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