erection of signage board at different places of parking lot within new town under new town kolkata development authority. erection of signage board at different places of parking lot within new town under new town kolkata development authority. , retro-reflectorised traffic signs providing and fixing of retro-reflectorised cautionary, mandatory and informatory sign as per irc :67 made of high intensity grade sheeting vide clause 801.3, fixed over aluminium sheeting, 1.5 mm thick supported on a mild steel angle iron post 75 mm x 75 mm x 6 mm firmly fixed to the ground by means of properly designed foundation with m15 grade cement concrete 45 cm x 45 cm x 60 cm, 60 cm below ground level as per approved drawing and clause 801 of specifications for road & bridge works of mort&h ( 5th revision ) . ( iv ) 80 cm x 60 cm rectangular