Returning from Mendocino to S.F. Bay Area, and near the beginning of Hwy 128, road re-pavement was happening on opposite side (north). Tire pressure dropped from 42 to 37psi and warning happened, this was not my first time, other nails and screws I have had 3 prior, but never affected my trip or day plan. At 25psi 15min later I took this picture and called Tesla Road Service from Filo (lucky to have 1 ATT bar there). Second warning happens @23psi RED in cluster FYI. But filled up with my electric pump and options were given, best of which were tire shops in Cloverdale. "Cloverdale Automotive & Tires" (not plugging them) nailed it (un-nailed actually), by plugging w/o need for jacking the car (10min it took, manager said it's roadside service, no charge, I left $20 his staff member who let me take pics). Moral of the story, carry a 12v pump, and expect micro-objects can bring even your SUV sized 20" tire to it's knees. 
