AARoads:United States/Colorado/1968 renumbering

• SH 1: south of Fort Collins removed, as it was redundant with US 287 and US 85
• SH 2: west and east of Denver removed; carrier route of US 40 west of Denver and carrier route of US 6 from Denver to Sterling and of US 138 from Sterling to Nebraska; note that it was rerouted over SH 153 from US 40 to SH 30
• SH 3: eliminated; carrier route of US 85 from the Wyoming Border to Denver
• SH 4: eliminated; carrier route of US 6 from the Utah Border to US 24, and US 24 from there to Kansas
• SH 6: eliminated; carrier route of US 50 from Grand Junction to Kansas one section along 4th/5th Street in Grand Junction turned back; duplicated US 6
• SH 8: west and east of Denver eliminated; carrier route of US 285 west of Denver and carrier route of US 40 east of Denver; portions renumbered SH 36 and SH 40
• SH 10: West of Walsenburg removed, as it was redundant with US 160 (section to the north now US 491)
• SH 11: eliminated; carrier route of I-25 from North Neveda Avenue (US 87) to South Nevada Avenue (US 87) in Colorado Springs
• SH 12: section east of La Junta eliminated, as it was the carrier route of US 350
• SH 14: section east of Sterling eliminated, as it was the carrier route of US 6; a section northwest of Fort Collins was the carrier route of US 287, but this is now a simple concurrency
• SH 15: section north of Monte Vista eliminated, as it was the carrier route of US 285
• SH 16: eliminated; carrier route of US 34 from Granby to Wiggins
• SH 17: section from Pagosa Springs to New Mexico eliminated, as it was the carrier route of US 84; section from Alamosa to Antonito was the carrier route of US 285; but that is now a concurrency
• SH 18: eliminated; carrier route of the US 50 freeway from Pueblo to Avondale
• SH 19: eliminated; carrier route of US 550 from New Mexico to Montrose
• SH 20: eliminated; carrier route of BL I-70 in Grand Junction
• SH 24: eliminated and renumbered SH 44 to avoid duplication with US 24
• SH 25: eliminated and renumbered SH 55 to avoid duplication with I-25
• SH 27: eliminated; carrier route of I-25 from South Nevada Avenue (US 87) in Colorado Springs to Fountain
• SH 32: created as a renumbering of SH 72 spur; note that a then recently-decommissioned one went from US 666 (now US 491) at Cortez west via Montezuma County Road G
• SH 33: eliminated; carrier route of I-225; reused immediately as a renumbering of SH 36; conflicted with US 36
• SH 36: eliminated; renumbered SH 33 to avoid duplication with US 36 and new SH 36; reused immediately on former portion of US 36; conflicted with US 40
• SH 40: eliminated; carrier route of US 164 from Four Corners to US 666 near Cortez; reused immediately on former portion of US 40
• SH 44: created as a renumbering of SH 24
• SH 49: eliminated; carrier route of US 36 from Denver to SH 7 in Boulder
• SH 50: became an extension of SH 105 from I-25 to SH 83 in Monument (this section no longer a state highway); conflicted with US 50
• SH 51: eliminated; carrier route of US 385 from Granada to Nebraska (note that north of Julesburg was SH 166 before 1953); reused immediately as a renumbering of SH 70 north of US 6
• SH 54: eliminated; carrier route of US 34 from Brush to Nebraska
• SH 55: created as a renumbering of SH 25
• SH 59: section south of Kit Carson eliminated; carrier route of US 287 from Kit Carson to Oklahoma
• SH 66: section from US 34 in Estes Park to Lyons eliminated, as it was the carrier route of US 36, took over routing of SH 262
• SH 70: eliminated; section south of Business I-70 was carrier route of US 285; north of I-76 renumbered SH 51
• SH 72: extended north over SH 160 from SH 119 to SH 7; rerouted on Ward Road instead of Ralston Road/ Wadsworth Road; section along I-70 from Wadsworth Road to Colfax eliminated, as it was a carrier route; SH 72 Spur renumbered SH 32
• SH 75: Section from US 85 west and north eliminated, as it became an extension of SH 88; rerouted east along SH 87 from US 85 via Littleton Boulevard and Broadway to US 285 (note that the former SH 87 section and Bowles Avenue sections are now city streets)
• SH 76: not renumbered immediately, as there was no I-76; renumbered to SH 78 when I-76 was created
• SH 78: eliminated; carrier route of US 6 from US 24 to SH 91; reused on former SH 76 when I-76 was created
• SH 80: eliminated; became an extension of SH 141 from Dove Creek to Naturita to avoid duplication with I-80S
• SH 84: eliminated; renumbered SH 134 to avoid duplication with US 84
• SH 87: eliminated; became an extension of SH 75 (now Littleton Boulevard and Broadway) from US 85 to US 285 to avoid duplication with US 87
• SH 88: extended west and north from US 85 and north to BU 1-70
• SH 91: section from Copper Mountain to US 40 in empire eliminated, as it was the carrier route for US 6
• SH 100: main route eliminated, as it was the carrier route of US 160 from US 350 to Kansas. Only the spur (which was SH 197 before the cutback in 1952) remained, and it became the main route.
• SH 102: eliminated; carrier route of US 36 from US 40 (Now SH 40) to Kansas
• SH 105: extended from I-25 to SH 83 over SH 50
• SH 106: eliminated; carrier route of US 666 (now US 491) from Cortez to New Mexico
• SH 123: eliminated; carrier route of US 287 from SH 14 to Wyoming
• SH 134: created as a renumbering of SH 84
• SH 141: extended over SH 80 from Naturita to Dove Creek.
• SH 153: eliminated; replaced by SH 2 from US 285 to US 40
• SH 160: eliminated; replaced by SH 72 from SH 119 to SH 7 to avoid conflict with US 160
• SH 163: eliminated; carrier route of US 285 from SH 17 to New Mexico
• SH 182: eliminated; carrier route of US 6 from US 40 in Idaho Springs to I-25 in Denver
• SH 185: eliminated; carrier route of I-25 from Castle Rock north via Denver to Wyoming
• SH 192: eliminated; route turned back
• SH 200: eliminated; route turned back
• SH 262: eliminated; Renumbered as part of SH 66