1. MoDOT's elimination of one lane in both directions and the narrowing of the others on Highway 40/64 between Hampton and Boyle has made traffic flow very dangerous. The narrow lanes are too narrow and painted with a solid white line. But, the old wider lane lines are still very visible which causes all kinds of trouble when navigating through that area. Especially at night.
2. So many intersection stoplights are set up in a time wasting way. This happens most often in south city and parts of south county. Each of the 4 directions has their own signal while the other 3 sit and wait. Why in the world can't the city, county or MoDOT have a left turn signal for east and west at the same time? Same for north and south. Why cycle through 4 individual green lights?
Hampton at 44 and Wilson with the Drury on the west side and the Holiday Inn/Hardees on the east is a mess. When you're going south on Hampton and get to this stop light you wait through 4 cycles, one for each direction. Then if you want to turn left onto Wilson to get to The Hill, you can only turn left with the arrow. Many times no traffic is heading north and you could easily turn left but have to sit and wait again.
Same thing for Laclede at Big Bend. This is one of the longest lights in St. Louis. Every direction has its own signal when an east/west or north/south combined green would work fine.
Another is the mess at Skinker and Clayton. There are at least 6 different signals in that area.
On the other hand, a busy intersection at Clayton and Big Bend has an efficient signal with the east/west and north/south combined with an added right turn arrow when the other direction gets their left turn arrow.