At the interchange, which is at the top of a broad hill, there are orange and white, temporary hydro barriers which give the impression of construction underway. The construction was finished years ago! The SCHP hides behind these barriers, and even "fixes" them when they get displaced (by wrecks, wind, etc.). If you slow down & look, you will notice there’s a network of paved strips behind the barricades. This lets them work both sides without getting muddy.

The posted limit is sixty (60) MPH, but the normal flow of traffic is more like 70 plus. There is an on-ramp beside it where SC302 merges, and traffic on the on-ramp will blow right past you (on the right – which is legal here) if you’re only going 60.
PS: In SC it’s illegal (56-5-1560) to impede the flow of traffic. This "particular enforcement activity" forces you to violate that law. Plus it diminishes the effect of the barrier.