17 October 19621960s1962B+WB+Wpost-war Londonblack and whitechalkcivil engineeringcivil engineersdirectionsfilteringHyde Park CornerinaugurationinstructionsletteringLondonmarkingmenopeningpaintpedestriansPiccadillyPICCADILLY ONLYpost-war Londonroadroad markingsshopssignstreetSwinging SixtiestarmacunderpassW1Westminsterwhite