Square with an X inside, a box with a diagonal cross used as a closed entry or no-entry traffic symbol.
U+26DCLEFT CLOSED ENTRYU+26DEFALLING DIAGONAL IN WHITE CIRCLE IN BLACK SQUAREU+26DBHEAVY WHITE DOWN-POINTING TRIANGLEU+26DFBLACK TRUCKU+26DADRIVE SLOW SIGNU+26E0RESTRICTED LEFT ENTRY-1U+26D9WHITE LEFT LANE MERGEU+26E1RESTRICTED LEFT ENTRY-2U+26D8BLACK LEFT LANE MERGEU+26E2ASTRONOMICAL SYMBOL FOR URANUSU+26D7WHITE TWO-WAY LEFT WAY TRAFFICU+26E3HEAVY CIRCLE WITH STROKE AND TWO DOTS ABOVE256 characters in the Miscellaneous Symbols Unicode block, from number 222.
U+26DDSQUARED SALTIREU+26DEFALLING DIAGONAL IN WHITE CIRCLE IN BLACK SQUAREU+26DFBLACK TRUCKU+26E0RESTRICTED LEFT ENTRY-1U+26E1RESTRICTED LEFT ENTRY-2U+26E2ASTRONOMICAL SYMBOL FOR URANUSU+26E3HEAVY CIRCLE WITH STROKE AND TWO DOTS ABOVEU+26E4PENTAGRAMU+26E5RIGHT-HANDED INTERLACED PENTAGRAMU+26E6LEFT-HANDED INTERLACED PENTAGRAMU+26E7INVERTED PENTAGRAMU+26E8BLACK CROSS ON SHIELDU+26E9SHINTO SHRINEU+26EACHURCHU+26EBCASTLEU+26ECHISTORIC SITEU+26EDGEAR WITHOUT HUBU+26EEGEAR WITH HANDLESU+26EFMAP SYMBOL FOR LIGHTHOUSEU+26F0MOUNTAINU+26F1UMBRELLA ON GROUNDU+26F2FOUNTAINU+26F3FLAG IN HOLEU+26F4FERRYU+26F5SAILBOATU+26F6SQUARE FOUR CORNERSU+26F7SKIERU+26F8ICE SKATEU+26F9PERSON WITH BALLU+26FATENTU+26FBJAPANESE BANK SYMBOLU+26FCHEADSTONE GRAVEYARD SYMBOLU+26FDFUEL PUMPU+26FECUP ON BLACK SQUAREU+26FFWHITE FLAG WITH HORIZONTAL MIDDLE BLACK STRIPE