Here is a photo that I took at the intersection of Caliope Street and Magazine Street below the Pontchartrain Expressway approach to the Mississippi River Bridge in New Orleans. Calliope Street is a divided street with the expressway approach occupying the median. A “U” turn was recently constructed to allow traffic from one side of calliope to make a “U” turn to the other side and to get onto an up ramp to the expressway. The “U” turn puts traffic in the opposite direction as Magazine Street, which is one way. Check out how the engineers who designed this have taken the brick paved Magazine Street sidewalk and smooshed it between the two concrete barriers; the sidewalk disappears into a point. The same condition occurs on the opposite side.
Right after I took this picture, I noticed a group of 3 or 4 people walking on the sidewalk, when confronted with this condition, had no choice but to cross the street into traffic to get back to a sidewalk that could be walked on. I suppose the other option would have been to climb the concrete divider and balance across with traffic coming at them from both directions.