The official USPS abbreviations used in City & Street names, as a PHP array.

usps-abbreviations.php

<?php

// based on: http://pe.usps.gov/text/pub28/28apc_002.htm
$usps_abbreviations = [
	'ALLEY'      => 'ALY',
	'ANNEX'      => 'ANX',
	'ARCADE'     => 'ARC',
	'AVENUE'     => 'AVE',
	'BAYOO'      => 'BYU',
	'BEACH'      => 'BCH',
	'BEND'       => 'BND',
	'BLUFF'      => 'BLF',
	'BLUFFS'     => 'BLFS',
	'BOTTOM'     => 'BTM',
	'BOULEVARD'  => 'BLVD',
	'BRANCH'     => 'BR',
	'BRIDGE'     => 'BRG',
	'BROOK'      => 'BRK',
	'BROOKS'     => 'BRKS',
	'BURG'       => 'BG',
	'BURGS'      => 'BGS',
	'BYPASS'     => 'BYP',
	'CAMP'       => 'CP',
	'CANYON'     => 'CYN',
	'CAPE'       => 'CPE',
	'CAUSEWAY'   => 'CSWY',
	'CENTER'     => 'CTR',
	'CENTERS'    => 'CTRS',
	'CIRCLE'     => 'CIR',
	'CIRCLES'    => 'CIRS',
	'CLIFF'      => 'CLF',
	'CLIFFS'     => 'CLFS',
	'CLUB'       => 'CLB',
	'COMMON'     => 'CMN',
	'CORNER'     => 'COR',
	'CORNERS'    => 'CORS',
	'COURSE'     => 'CRSE',
	'COURT'      => 'CT',
	'COURTS'     => 'CTS',
	'COVE'       => 'CV',
	'COVES'      => 'CVS',
	'CREEK'      => 'CRK',
	'CRESCENT'   => 'CRES',
	'CREST'      => 'CRST',
	'CROSSING'   => 'XING',
	'CROSSROAD'  => 'XRD',
	'CURVE'      => 'CURV',
	'DALE'       => 'DL',
	'DAM'        => 'DM',
	'DIVIDE'     => 'DV',
	'DRIVE'      => 'DR',
	'DRIVES'     => 'DRS',
	'ESTATE'     => 'EST',
	'ESTATES'    => 'ESTS',
	'EXPRESSWAY' => 'EXPY',
	'EXTENSION'  => 'EXT',
	'EXTENSIONS' => 'EXTS',
	'FALL'       => 'FALL',
	'FALLS'      => 'FLS',
	'FERRY'      => 'FRY',
	'FIELD'      => 'FLD',
	'FIELDS'     => 'FLDS',
	'FLAT'       => 'FLT',
	'FLATS'      => 'FLTS',
	'FORD'       => 'FRD',
	'FORDS'      => 'FRDS',
	'FOREST'     => 'FRST',
	'FORGE'      => 'FRG',
	'FORGES'     => 'FRGS',
	'FORK'       => 'FRK',
	'FORKS'      => 'FRKS',
	'FORT'       => 'FT',
	'FREEWAY'    => 'FWY',
	'GARDEN'     => 'GDN',
	'GARDENS'    => 'GDNS',
	'GATEWAY'    => 'GTWY',
	'GLEN'       => 'GLN',
	'GLENS'      => 'GLNS',
	'GREEN'      => 'GRN',
	'GREENS'     => 'GRNS',
	'GROVE'      => 'GRV',
	'GROVES'     => 'GRVS',
	'HARBOR'     => 'HBR',
	'HARBORS'    => 'HBRS',
	'HAVEN'      => 'HVN',
	'HEIGHTS'    => 'HTS',
	'HIGHWAY'    => 'HWY',
	'HILL'       => 'HL',
	'HILLS'      => 'HLS',
	'HOLLOW'     => 'HOLW',
	'INLET'      => 'INLT',
	'INTERSTATE' => 'I',
	'ISLAND'     => 'IS',
	'ISLANDS'    => 'ISS',
	'ISLE'       => 'ISLE',
	'JUNCTION'   => 'JCT',
	'JUNCTIONS'  => 'JCTS',
	'KEY'        => 'KY',
	'KEYS'       => 'KYS',
	'KNOLL'      => 'KNL',
	'KNOLLS'     => 'KNLS',
	'LAKE'       => 'LK',
	'LAKES'      => 'LKS',
	'LAND'       => 'LAND',
	'LANDING'    => 'LNDG',
	'LANE'       => 'LN',
	'LIGHT'      => 'LGT',
	'LIGHTS'     => 'LGTS',
	'LOAF'       => 'LF',
	'LOCK'       => 'LCK',
	'LOCKS'      => 'LCKS',
	'LODGE'      => 'LDG',
	'LOOP'       => 'LOOP',
	'MALL'       => 'MALL',
	'MANOR'      => 'MNR',
	'MANORS'     => 'MNRS',
	'MEADOW'     => 'MDW',
	'MEADOWS'    => 'MDWS',
	'MEWS'       => 'MEWS',
	'MILL'       => 'ML',
	'MILLS'      => 'MLS',
	'MISSION'    => 'MSN',
	'MOORHEAD'   => 'MHD',
	'MOTORWAY'   => 'MTWY',
	'MOUNT'      => 'MT',
	'MOUNTAIN'   => 'MTN',
	'MOUNTAINS'  => 'MTNS',
	'NECK'       => 'NCK',
	'ORCHARD'    => 'ORCH',
	'OVAL'       => 'OVAL',
	'OVERPASS'   => 'OPAS',
	'PARK'       => 'PARK',
	'PARKS'      => 'PARK',
	'PARKWAY'    => 'PKWY',
	'PARKWAYS'   => 'PKWY',
	'PASS'       => 'PASS',
	'PASSAGE'    => 'PSGE',
	'PATH'       => 'PATH',
	'PIKE'       => 'PIKE',
	'PINE'       => 'PNE',
	'PINES'      => 'PNES',
	'PLACE'      => 'PL',
	'PLAIN'      => 'PLN',
	'PLAINS'     => 'PLNS',
	'PLAZA'      => 'PLZ',
	'POINT'      => 'PT',
	'POINTS'     => 'PTS',
	'PORT'       => 'PRT',
	'PORTS'      => 'PRTS',
	'PRAIRIE'    => 'PR',
	'RADIAL'     => 'RADL',
	'RAMP'       => 'RAMP',
	'RANCH'      => 'RNCH',
	'RAPID'      => 'RPD',
	'RAPIDS'     => 'RPDS',
	'REST'       => 'RST',
	'RIDGE'      => 'RDG',
	'RIDGES'     => 'RDGS',
	'RIVER'      => 'RIV',
	'ROAD'       => 'RD',
	'ROADS'      => 'RDS',
	'ROUTE'      => 'RTE',
	'ROW'        => 'ROW',
	'RUE'        => 'RUE',
	'RUN'        => 'RUN',
	'SHOAL'      => 'SHL',
	'SHOALS'     => 'SHLS',
	'SHORE'      => 'SHR',
	'SHORES'     => 'SHRS',
	'SKYWAY'     => 'SKWY',
	'SPRING'     => 'SPG',
	'SPRINGS'    => 'SPGS',
	'SPUR'       => 'SPUR',
	'SPURS'      => 'SPUR',
	'SQUARE'     => 'SQ',
	'SQUARES'    => 'SQS',
	'STATION'    => 'STA',
	'STREAM'     => 'STRM',
	'STREET'     => 'ST',
	'STREETS'    => 'STS',
	'SUMMIT'     => 'SMT',
	'TERRACE'    => 'TER',
	'THROUGHWAY' => 'TRWY',
	'TRACE'      => 'TRCE',
	'TRACK'      => 'TRAK',
	'TRAIL'      => 'TRL',
	'TUNNEL'     => 'TUNL',
	'TURNPIKE'   => 'TPKE',
	'UNDERPASS'  => 'UPAS',
	'UNION'      => 'UN',
	'UNIONS'     => 'UNS',
	'VALLEY'     => 'VLY',
	'VALLEYS'    => 'VLYS',
	'VIADUCT'    => 'VIA',
	'VIEW'       => 'VW',
	'VIEWS'      => 'VWS',
	'VILLAGE'    => 'VLG',
	'VILLAGES'   => 'VLGS',
	'VILLE'      => 'VL',
	'VISTA'      => 'VIS',
	'WALK'       => 'WALK',
	'WALKS'      => 'WALK',
	'WALL'       => 'WALL',
	'WAY'        => 'WAY',
	'WAYS'       => 'WAYS',
	'WELL'       => 'WL',
	'WELLS'      => 'WLS'
];