Road blocks don't always show up on maps either
But as has been said use both
But don't forget to engage brain at the same time as sat nav
If the road sign says NO ENTRY it means YOU even if the sat nav tells you to go that way.
If you were using a map you would obey road signs but sat nav has a way of switching off that brain function.
Its a good idea to follow the site directions from a site book rather than sat nav.
Our sat nav is excellent but it still tried to send us through a pedestrian underpass near to the site in Brittany.
Fortunately we knew the area
------------- John
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