Another issue with backed up drive-thrus is that their customers are blocking driveways for other customers. Here's an article on a similar issue with another drive-thru. Also - many permits are for the building and construction but don't necessarily specify the occupant.
At the In-N-Out on Shaw Avenue near Highway 99, the drive-thru line often spills out onto the busy street. Last Friday at lunchtime, five or six cars were stopped in Shaw Avenue’s right-hand lane, waiting to order food.
“This one is the worst,” said Chong Kim, who owns Liquor Junction just to the east of In-N-Out.
Despite signs that say “Please do not block driveway” in front of the liquor store and the nearby tire shop, it’s still a problem, he said.
“My business is damaged because my customers cannot come in,” he said. Two regular customers confirmed that they sometimes don’t bother stopping at the store when the restaurant line is in the way.
Cars also have problems leaving Kim’s parking lot when the right-hand lane is stopped, but the other lanes are whizzing by at 35 to 40 miles per hour.
There’s been at least one accident, he said, and he regularly hears brakes screeching with near misses.
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One challenge? City workers often don’t know which restaurant will move into a proposed drive-thru, said city traffic engineer Jill Gormley.
“A lot of times we don’t necessarily know that it’s a Chick-fil-A or an In-N-Out Burger,” she said.
A developer may want to lure a certain restaurant, but in the early stages of planning a new shopping center, they may not have landed one yet. The paperwork Gormley’s department sees may call for two drive-thrus and a handful of stores, without names.
For many drive-thrus, — say, Burger King — requiring space for 10 cars may be more than enough, she said.
Some places, like the Chick-fil-A on north Blackstone Avenue, were built a for a different tenant. The site was originally a Krispy Kreme with much shorter lines. Plus, her department focuses on how the business affects traffic on streets, not in private parking lots.