Tires with built-in sensors keep a watchful eye on tread wear
 

Continental is bolstering its Tire Pressure Monitoring System (TPMS ) to not only monitor your tire pressure but its tread depth, too. As your tires age and change shape, so does the way they roll and interact with the road surface. Continental's...

http://www.engadget.com/2014/05/15/t...=rss_truncated