In 2011, drive-thru usage at quick-service restaurants increased by 2 percent to 12.4 billion visits, with chains like McDonald's and Popeyes investing in technology and multiple lanes to improve speed of service despite overall slower service times. Drive-thrus remain the preferred ordering method at hamburger, Mexican, and chicken restaurants, prompting operators to focus on order accuracy, fast delivery, and portable menu items to enhance customer satisfaction and profitability.
https://www.qsrweb.com/articles/drive-thru-usage-up-speed-of-service-down/