How to Prevent Speeding on North Peachtree Road

Shut the whole street down at its low point over the culvert leading to Kingsley Lake for culvert repairs.
Put up a bunch of signage announcing the detour.
Fine the hell out of anyone speeding through the work area.

Stay safe, folks.  Take this opportunity to remember the regular speed limit is 25 MPH and yes, you do have to ride your brakes on this road to stay at that limit.  No, you do not get a pass if you live in Dunwoody.