Pretty interesting report on the use of DRCC/PCS/LKA on Toyota branded vehicles and how owners feel about such technologies and how their behaviours change (if at all) with these technologies installed in their vehicles. Edit: You have to request a copy via e-mail now. It is free as of this writing http://www.iihs.org/bibliography/topic/2063
Thought I'll bump this up now that TSS-P is standard on most Toyota vehicles. I'm surprised @bwilson4web hasn't commented on this
And... now it's gone. It was still live when I bumped this thread. Looks like you have to request a copy (doesn't appear to have a charge/fee associated) http://www.iihs.org/bibliography/topic/2063