Wikipedia:WikiProject U.S. Roads/Wyoming numbering history

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A 1963 Gousha map shows four-digit "state secondary" numbers. There is an obvious pattern in comparing old to new numbers. They also match the numbers in the Reference Marker Book.

[edit] Albany County

WYO 10: 0101
WYO 11: 0102
WYO 130: 0103
WYO 12: 0104
WYO 13: 0105
WYO 210: 0107
WYO 34: 0109
WYO 14: 0103 Spur (now 0110)

[edit] Big Horn County

WYO 30: 0200
WYO 31: 0201; 0201 Spur (now 0203) is a wye connection at Manderson
WYO 32: 0202
WYO 33: 0205 ("new name" only)
WYO 35: 0206 ("new name" only)
WYO 36: 0207 ("new name" only)
WYO 37: 0208

[edit] Campbell County

WYO 50: 0300
WYO 59: 0301 (now 43)
US 14/US 16: 0302
WYO 51: 0303

[edit] Carbon County

WYO 70: 0401
WYO 71: 0402
WYO 72: 0404, 0412
WYO 73: 0406
WYO 74
WYO 75
WYO 76: 0411
WYO 77
WYO 78

[edit] Converse County

WYO 90
WYO 91
WYO 93: 0502
WYO 94
WYO 95: 0504
US 20/US 26/US 87: 0505
WYO 96

[edit] Crook County

WYO 116: 0600
WYO 24: 0601
WYO 110: 0601 Spur (now 0602)
WYO 111: 0603
WYO 112: 0604
WYO 113
US 14: 0607

[edit] Fremont County

WYO 131: 0701
WYO 132: 0703
WYO 133: 0706
WYO 134: 0707
WYO 135: 0708
WYO 136: 0710
WYO 137: 0711
WYO 138
WYO 139: 0708 Spur (now 0709)

[edit] Goshen County

WYO 151: 0800
WYO 152: 0801
WYO 153
WYO 154: 0803
WYO 155
WYO 156: 0805
WYO 157: 0806
WYO 92: 0807
WYO 158: 0807 Spur (now 0802)
WYO 159: 0808
WYO 160: 0809
WYO 161: 0811

[edit] Hot Springs County

WYO 170: 0900
WYO 171: 0901
WYO 172: 0902
WYO 173: 0903
WYO 174
WYO 175: 0904
WYO 176
WYO 177?

[edit] Johnson County

WYO 190: 1000
WYO 191: 1001 (now 1000)
WYO 192: 1002
WYO 193: 1003
WYO 194: 1003 Spur (now 1702)
US 16: 1004
WYO 195
WYO 196: 1006
WYO 197

[edit] Laramie County

WYO 210
WYO 211: 1100
WYO 212
WYO 213: 1102
WYO 214: 1103
WYO 215: 1104
WYO 216: 1105
WYO 217
WYO 218
WYO 219: 1108
WYO 221
WYO 222
US 30: 1111
WYO 223
WYO 224
WYO 225
WYO 226

[edit] Lincoln County

WYO 231: 1200
WYO 232: 1201
WYO 233: 1202
WYO 234
WYO 235: 1203
WYO 236: 1204
WYO 237: 1205
WYO 238: 1206
WYO 239: 1207
WYO 240: 1208
WYO 241: 1209
US 30: 1210 ("new name" only)
WYO 89: 1211 ("new name" only)

[edit] Natrona County

WYO 250
WYO 251: 1301
WYO 252: 1301 Spur (now 1302)
WYO 253
WYO 254
WYO 255
WYO 256
WYO 257
WYO 258
WYO 259

[edit] Niobrara County

WYO 270: 1400, 1401
WYO 271
WYO 272
WYO 273
WYO 274

[edit] Park County

WYO 290: 1500
WYO 291: 1501
WYO 292
WYO 293
WYO 294: 1503
WYO 295: 1504, 1505 (now also 1506)
WYO 296: 1507
WYO 297

[edit] Platte County

WYO 310: 1600
WYO 311: 1600 (now 1601)
WYO 312: 1601
WYO 313: 1602
WYO 314: 1603
WYO 315: 1605
WYO 316: 1604
WYO 317
WYO 318
WYO 319
WYO 320: 1610
WYO 321
WYO 322

[edit] Sheridan County

WYO 331: 1701
WYO 332: 1702
WYO 333
WYO 334
WYO 335: 1703
WYO 336: 1704
WYO 337
WYO 338: 1706
WYO 339: 1706 Spur (now 1705)
WYO 340: 1707
WYO 341: 1700 ("new name" only)
WYO 342
WYO 343: 1709
WYO 344
WYO 345: 1712

[edit] Sublette County

WYO 350: 1800
WYO 351: 1801
WYO 352: 1802
WYO 353: 1804
WYO 354

[edit] Sweetwater County

WYO 530: 1900
WYO 430: 1903
WYO 370: 1904
WYO 371: 1905
WYO 372: 1906
WYO 373
WYO 374: 1910
WYO 375: 1909
WYO 376
WYO 377: 1911
WYO 28: 1912

[edit] Teton County

WYO 22: 2000
WYO 390: 2001
WYO 391

[edit] Uinta County

WYO 150: 2100
WYO 410: 2101
WYO 411: 2104 ("new name" only)
WYO 412: 2103
WYO 413
WYO 414: 2105

[edit] Washakie County

WYO 431: 2200
WYO 432: 2201
WYO 433: 2202
WYO 434: 2203
WYO 435
WYO 436

[edit] Weston County

WYO 450: 2300
WYO 451: 2301
WYO 116: 2302
WYO 585: 2303
WYO 452

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