they use to have a lane marked out there
They do atleast the part way that I have gone back. Someone told me that they didn't set them correctly and there are still things to hit in the marked lane. I haven't gone back to check it out. I'm always on the other side of the lake.
It has been a while since I have been on the South side of the bridge on that side of the lake. However, the last time I was over there, the boat lane marker buoys were NOT where they should be. I have the way through there marked (waypoints) on my electronics. I followed the path from the Navionics app on my iPhone from the bridge to the Britton landing. I did it at clutch ahead speed while setting the waypoints. Be careful over there!
On another note, if you plan to fish Joe Pool often, you may consider buying the Hook-N-Line map of the lake. I have found it very helpful.