access-limited advice advising alert allocated allocation arrow authorised authorized automobiles behave black blue communicate communication denied directive emergency emergency-vehicles entry-denied entry-prohibited information informing limited limited-access no-access no-entry not-allowed not-permitted permission-denied prohibited prohibition red restricted restriction restrictions safety sign vehicles warning white access-denied appropriate-behavior appropriate-behaviour authorised-approval authorized-approval behavior behaviour direction exception keep-out limitations staff staff-approval staff-approved unauthorised unauthorized architectural architecture Asia authority building classical-design collections Colonial color colored colors colour coloured colours columns construction decorations decorative dome domed external height heritage high historic historic-building historical history landmark Masonic-influence museum national-museum ornamental ornamentations rotunda significant Singapore stained-glass substantial tiled tiles Victorian windows zinc-fish-scaled-tiles bell-turret clock clock-tower common-corridor connected connections cupola link tower Victoria-Theatre-and-Concert-Hall-link no-admission no-admittance red. restricted authorised-entry-only authorized-entry-only care caution concern confined-space danger dangerous lettering limited-permission limited-space risk risks risky signage warning-sign