Yum Brands hopes to use artificial intelligence to take down drive-thru orders at hundreds of Taco Bell restaurants by the end of this year.The restaurant company announced on Wednesday that it's expanding its rollout of the tech in the U.S., as it eyes implementing it in drive-thru lanes globally.Yum joins restaurant rivals like Wendy's and White Castle in betting on voice AI, but its plans are the most ambitious to date. While tech companies may promise that voice AI can speed up service times, reduce lab ...