The exceeds speed limit warning starts at 5mph over the limit, this is too high as 35 mph in a 30 zone with impose a fine.

Is there a way to set this zero ie a warning at exactly the speed limit?

I agree the limit is to high for 30 and 40 zones and would still incur a penalty, anyone who is continually trying to stay with in the limit spends a lot of time looking at the speedo to check the speed it would be great if the limit alert could be set at 1 mile above and leave more time to concentrate on driving knowing copilot was watching the speed.