Dec 23 (Reuters) - Amazon's ( AMZN ) self-driving unit Zoox is recalling ‌332 vehicles ​in the ‍U.S. over ⁠an ⁠Automated Driving Systems ‌software ​error that may cause ⁠the ‍vehicles ​to cross or stop in front ‍of oncoming traffic, increasing the risk ​of ‍a crash, the U.S. ​National Highway Traffic Safety Administration said on Tuesday.