area and the actual inner city area. The only exceptions to the rule are I-385 in Greenville, I-85 in Spartanburg, the SC 31 freeway around Myrtle Beach and I-95 around Florence. I-385 has a 55 mph speed limit at its terminus within the Greenville area. SC 31 is posted at even though it is in the greater Myrtle Beach area. SC 31 was originally posted at 60 mph when it was built in 2004. I-95 even as a 6 lane semi-urban built freeway, maintains a 70 mph speed limit through the Florence area (as of June 2013, from just south of exit 160 to just south of exit 164, the speed limit has been reduced to 60 mph, a textbook speed trap). It is 6 lanes from SC 327 to I-20. Four-lane arterials by default are posted at . Four-lane bypasses at 60 mph can be found in Marion and Sumter, but others remain at . It is not uncommon that 55 mph can be expected in more built-up areas prior to municipalities and/or if the engineering on the highway is below standards. However, U.S. Route 123 has a divided segment where the speed limit is . Two-lane roads are 55 mph by default. However, a handful of counties maintained as either state secondary roads or county roads are posted at . Central business districts (CBDs) are posted at . A recent trend is occurring with CBD speed limits that they are being signed at in random municipalities around the state. Speed limit drops generally are done in 10 mph increments but 20 mph drops are not uncommon. Improvements in the mid-2000s were done by SCDOT to warn motorists ahead of time for speed drops on various roadways. However, there are still some roadways that have not received that treatment. However, there are a couple roadways that get 25 mph to 30 mph drops as well. The speed limit drops from to at a traffic circle with US 378 and SC 391 in eastern Saluda County. On US 52 northbound approaching Kingstree, the speed limit drops from to . South Dakota Shortly after the December 1995 repeal of the 65/55 mph National Maximum Speed Law, South Dakota raised its general rural speed limits to on freeways and on other roads along with on a few 4 lane divided highways. Almost a decade after posting the 75 mph limit, average speeds