Chick-fil-A is one of the most popular quick-service restaurants in the southern states, and its drive-thru has consistently provided food to customers on the go thanks in large part to its 'Face-to-Face Ordering' system. Rather than saving ordering for a single spot in the drive-thru line, Chick-fil-A sends out staff during peak hours to take customers' orders in person, drastically speeding up the ordering process as a whole.
Face-to-Face Ordering may seem low tech in comparison to ordering through a radio system or even a touchscreen at a set point in the drive-thru line, but that belies the innovation of the solution. First of all, staff are simply far more mobile and agile than any available tech, giving them the ability to take multiple cars' orders in far less time. Then, those staff are equipped with tablets that let them send orders through to the restaurant immediately, so they don't need to constantly shuttle back and forth between the drive-thru line and the restaurant.
Image Credit: Chick-fil-A