Beware, MHP and des peres police watch this area good. Speed limit is 45 mph, but those familiar with the area know that some do as much as 65, since the road has no stoplights or intersections until the EB and WB lanes come together again at the white castle. I have done 50 with no problems, main point to watch for is the U-turn lane just west of the big southwest bank bldg.