Interesting feature. Alternatively, if you want to direct users to a page where they can get driving directions directly, do the following:
1. Embed a Google Maps™ map onto your page by going to Google Maps™, typing in the address (or biz name if they have it) and then clicking ’link’.
2. Customize, place on your page (or skip this step to only link).
3. Click the ’Driving Directions’ link on your new map.
4. Copy the URL on the page you just arrived at.
And you will then have a working link directly to give directions. See it in action here (note the map, and the link above for directions):
http://www.braeviewcare.com/directions.html