How many of you use tools like google maps to search out new routes to work?

I found myself looking tonight at ways to extend my 7.33 mile (one way) commute to something more than that. Came up with a 9.3 mile ride that should be wonderful, an 11 mile ride, and a 16.2 mile ride.

The last two intentionally take me well out of my way. I'm going to drive the two later routes to make sure the roads I've selected (which I'm unfamiliar with) are suitable for safe bicycle commuting.

What do all of you do for route planning?

7.3 Miles: My Most Direct Route

9.3 Miles Alternate Route #1

11 Miles Alternate Route #2

And Finally
16.2 Miles Alternate Route #3