I think the 'road' is actually the old Lewisville bridge that was destroyed when the new lake was formed. When the water was real low you could easily see it and walk out aways from the south side to fish it.
I think some of the maps show it. You might Google and find it. I would pinpoint it for you but my maps are in my boat, the boat is under a cover, and it is outside. Maybe ask on the bank fishing forum - they'll probably point you right to it.
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I know there is more to life than fishing; I just haven’t figured it out yet.
Jimmy