Several times a week, I hear you report that southbound Lakeshore Drive is slowing around Chicago Avenue. On occasion, I have even managed to be in the immediate vicinity of these supposed slowdowns, though I have yet to observe any meaningful delays.
However, after extensive field research and careful observation, I have determined that there is, in truthful fact, a traffic light on Lakeshore Drive at Chicago Avenue.
I'm gonna go out on a limb here and suggest that the fact of this traffic light occasionally turning red may actually be the source of these supposed slowdowns. Further, I think that the traffic light's change of colors might even be predictable in some fashion, recurring on a regular basis, which would mean putting it in the traffic report is kinda...
But hey, whatta I know? I'm just some schlub who wandered in from Milwaukee!