Not sure if this has been posted elsewhere, but PNC Tower is about to get new signage.
On Saturday, March 21st, 3rd Street will be closed between Walnut and Race, and Vine will be closed from 2nd to 4th Streets, from 6:00 AM to 6:00 PM for multiple helicopter lifts to remove and replace signs on the PNC Building. They will be using the 3rd/ Vine intersection as their staging area. The designated detour route for 3rd Street will be Walnut - 2nd - Main - Mehring - Elm.
In addition, 4th Street will be closed intermittently (10-15 minute time periods), between Walnut and Race for safety purposes each time the helicopter is traveling towards, away, or hovering near the building.
Official Release: http://www.cincinnati-oh.gov/city/downloads/PNCBankSignReplacement.pdf