Well, I swear, I hadn't ever seen that logo until I just did a google search.
The idea actually started with the secondary logo, which I got from another logo (see below), and the idea for the primary came when my dad and I were driving up from Tucson last weekend on the I-10, and we had to put on the brakes to avoid hitting a roadrunner that was dumb enough to cross the highway (2 lane at the time) right in front of us.
And then the Alternate came as a result of the Secondary combined with the Primary.
I thought my idea of the road sign was actually kind of clever. Unfortunately, I guess it's not as originial as I thought it was.
Oh well...