Ramp Metering Without Signals

I was driving between Cartersville and Rome Georgia and noticed something I had not seen before. A so-called ramp meter with stop signs. A ramp to get on US 411 southbound had one stop sign away form the main freeway with a sign telling the driver to wait until traffic clears the second stop sign - at the freeway entrance point - before proceeding. I presume in this environment it works fine. Maybe you the reader have seen this many times but for me it was a first. If I had not been driving or if I lived nearby I would get a photo and post it.