As a regular user, the lane is probably the widest in Memphis, with a big buffer area between the lanes. The Google street view image below shows the lane with probably the narrowest buffer area.
Pretty sure they have reflective paint on them, and the area is well lighted. The street is always getting the barriers and signs (metal yield to cyclists sign in the background) destroyed -- flattened and torn out of the pavement. Maybe a bit callous, but I'm not all that concerned with damage to vehicles, considering they are there to protect cyclists. At least it might cause a driver to come to their senses.