There's an option you can enable that gives you additional announcement about approaching navigation, I haven't enabled mine maybe I'll try it tomorrow... but from how the manual describes it it sounds like instead of it saying "In 800 feet turn left" it'll give you an additional warning at 1600 feet for example.

Adjust the announcement to verbose

There's an option you can enable that gives you additional announcement about approaching navigation, I haven't enabled mine maybe I'll try it tomorrow... but from how the manual describes it it sounds like instead of it saying "In 800 feet turn left" it'll give you an additional warning at 1600 feet for example.

Yep already have that set...like tekkie and I said, it's the verbose level that you are talking about.  It does get to be a bit annoying at times, especially when turns are very close together.