[Christ]

I find this highly unlikely, actually.

It's completely impractical to expect a bunch of untrained delivery drivers to stop making left turns, and especially to the UPS installation on the Carlisle Pike in Mechanicsburg, which I'm particularly familiar with. (I used to be a security guard there when it was still Overnite Transport.)

In essence, while they may have told drivers to stop making left turns, drivers likely thumbed their nose at the "rule" and continue to operate within the normal capacity of the roads they're using.