Sitting in Memphis,Tn.. bored and I have a couple of questions that I have wanted to know the answers to.. 1st question, there is a sign in Kentucky on I-75 south of Lexington that says something like, no STAA trucks next exit. what is STAA... 2ND question have you ever seen a tanker truck hauling helium , what keeps the trailer on the ground.. as you can tell by these post I have way to much time on my hand but maybe I will sleep better knowing these answers.. thanks and be safe