Looking for circuits of AGV

Hi all
I m designing an AGV (automated guided vehicle ),it is really new with me,
I m looking for a circuit of AGV to reference. Any body can help me ?
More information about AGV ,you can wacht videos.
YouTube - SmartCart Automatic Guided Cart demonstration at NA 2008 Show
YouTube - Smart Warehouse Technology - Automatic Guided Vehicles
Thanks!

You've already found several vides, a simple google search will provide you with many refrence circuits and concepts.

Thanks for your rely ,Sceadwian
I had seached on google before i posted this question,but i didnt get a circuits that i want
i think this forum is about electronic so maybe it have menbers who have experiences about it ,so they can share with me.
Im waiting for..

Batman 149, has already built your agv?