Stop Vehicle Mode when I arrive

[watamensch]

Hi... Unlike others, I like using the vehicle mode on my razr maxx.

Here's the problem: When I arrive at my destination and turn my car off, the vehicle mode does not stop working. I take the phone with me, and unless I physically turn it off, it stays in veh mode with all settings, including announcement of texts. I have been in meetings where my phone blurts out "TEXT MESSAGE FROM ...."

How can I set my vehicle mode to turn off when I arrive at my destination? Smart Actions only tell the phone WHAT TO DO, not WHAT NOT TO DO!