The old Bucks County Parking Garage, at Broad and Union Streets in Doylestown, will close on Friday. Starting Saturday all parking is in the new garage across the street from the old one.  County employees, visitors and others who use the garage are asked to remove their vehicles by Monday to make way for demolition, followed by construction of a new justice center on the site.  Courthouse security will tag any vehicles still in the old garage on Monday and contact their owners.  If the owners do not remove them, they will be towed one week later.