Hi Phil,
Thanks for your help. Yes, it makes a lot of sense. Data is coming from a gps device and I am still new to street maps so I am getting some bits incorrectly.
Cheers,
Vini

Data is coming from a gps device. You are absolutely right. I got the average speed calculation incorrect for this area.
Thanks for your help, appreciated.

Thanks. Does that include Grand Drive? It seems to be 30 everywhere.