Wikipedia:WikiProject U.S. Roads/Utah/1977 renumbering

The main source is [1].

30 was signed but not official from 1966 to 1977.

New	Old	Current	From	To
State Route 6	State Route 27	US-6	Nevada	Salina
State Route 6	State Route 8	US-6	Salina	West of Green River
State Route 9	State Route 15	SR-9	Harrisburg Junction	Mount Carmel Junction
State Route 11	State Route 11	US-89A	Arizona	Kanab
State Route 13	State Route 84	SR-13, SR-30	Brigham City	North of Collinston
State Route 15	State Route 1	I-15	Arizona	Idaho
State Route 16	State Route 16	SR-16	Wyoming	Sage Creek Junction
State Route 26	State Route 50	SR-26	Roy	Ogden
State Route 28	State Route 28	SR-28	Gunnison	North of Levan
State Route 30	State Route 70	SR-30	Nevada	West of Snowville
State Route 30	State Route 102	SR-102	West of Tremonton	Deweyville
State Route 30	State Route 69	SR-38, SR-30	Deweyville	Logan
State Route 30	State Route 16	SR-30	Garden City	Sage Creek Junction
State Route 30	State Route 51	SR-30	Sage Creek Junction	Wyoming
State Route 35	State Route 35	SR-35	Francis	North of Duchesne
State Route 40	State Route 6	US-40	Silver Creek Junction	Colorado
State Route 50	State Route 26	US-50	Delta	Salina
State Route 69	State Route 69	SR-38	Brigham City	Deweyville
State Route 70	State Route 4	I-70	Cove Fort	Colorado
State Route 78	State Route 163	SR-78	West of Levan	Levan
State Route 80	State Route 2	I-80	Nevada	Wyoming
State Route 84	State Route 3	I-84	Idaho	Near Echo
State Route 89	State Route 259	US-89	Arizona	Kanab
State Route 89	State Route 11	US-89	Kanab	Sevier Junction
State Route 89	State Route 28	US-89	South of Salina	Gunnison
State Route 89	State Route 32	US-89	Gunnison	Thistle
State Route 89	State Route 8	US-89	Moark Junction	North of Lehi
State Route 89	State Route 271	US-89	Near Draper Crossroads	Becks
State Route 89	State Route 106	US-89	Becks	Bountiful
State Route 89	State Route 169	US-89	Bountiful	North of Bountiful
State Route 89	State Route 49	US-89	Lagoon Junction	Ogden
State Route 89	State Route 50	US-89	Ogden	Hot Springs Junction
State Route 89	State Route 84	US-89	Hot Springs Junction	South of Brigham City
State Route 89	State Route 13	US-89	Logan	Garden City
State Route 89	State Route 16	US-89	Garden City	Idaho
State Route 91	State Route 85	US-91	South of Brigham City	Idaho
State Route 92	State Route 80	SR-92	Near Point of the Mountain	Provo Canyon
State Route 102	State Route 102	SR-102	East of Lampo Junction	West of Tremonton
State Route 106	State Route 106	SR-106	Bountiful	Farmington
State Route 126	State Route 84	SR-126	South of Layton	Hot Springs Junction
State Route 134	State Route 40	SR-134	Kanesville	Pleasant View
State Route 163	State Route 47	US-163, US-191	Arizona	Monticello
State Route 163	State Route 9	US-191	Monticello	Crescent Junction
State Route 169	State Route 89	2200 North	West of Eden	Eden
State Route 189	State Route 7	US-189	South of Provo	South of Heber
State Route 189	State Route 151	SR-32	Hailstone Junction	Francis
State Route 189	State Route 35	SR-32	Francis	South of Wanship
State Route 215	State Route 5	I-215	Southeast of Salt Lake City	North of Salt Lake City
State Route 666	State Route 9	US-491	Monticello	Colorado