What is the law in CA for transporting oversized (longer than vehicle) cargo? I'm thinking about buying some 20' sticks of pipe to make a front bumper. My 4Runner is about 15' in length. I have hitch receivers on front and rear of the vehicle. I want to make a temp rack for the f/r receivers that just extends past the roofline so I can put the pipes on and tie them down.

The pipe will be supported by yakima roof bars in the middle of the vehicle. Here's a few crude pics for reference...
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