Fast food slowing down

(CNN) - Drive-thru times are slowing down.

That's according to an annual study that measures the average speed from order to pick-up at seven major fast food restaurants.

The study found the average drive-thru wait time is nearly 181 seconds, about eight seconds slower than last year.

Chick-fil-a was the slowest, with an average time of nearly 204 seconds. Wendy's was the fastest at nearly 134 seconds.

Researchers said the overall slowdown is mostly the result of busier drive-thru lanes and more complex new products being offered.