Is there a way to set a preferred road?

Lately, when using the navigation on my 760, I end up saying "Nah, I don't want to go that way." fairly often.

I've messed around with the faster time/shortest distance settings and nothing ever changes. From my house, it's a straight shot down one road all the way to the major interstate freeway that I use a lot...however, my 760 always tries to get me to do a zigzag pattern on several roads to get to the freeway.

Here's a picture of what it will do: http://img115.imageshack.us/my.php?image=mapfq3.jpg

I don't know why it hates the road I want to take so much, but as I drive down it, my 760 is constantly recalculating, and then tries to get me to go down a different road. As you can see from the picture, my 760 *loves* Bangerter Hwy...it's always the 1st route chosen when going north or south. If I pass it, it will tell me to do a U-Turn and get on the Hwy!!! I don't mind going down Bangerter Hwy, the speed limit is 60, but there are signals on every major intersection, so using I-15 ends up being *much* faster.

Is there any way to set a preferred road to take whenever possible?