Category:Roads numbered 166

• Signs for roads numbered 166‎ (1 C, 15 F)

A

• A166 road (England)‎ (10 C, 1 F)
• Arkansas Highway 166‎ (5 F)

B

• Bundesstraße 166‎ (2 C, 7 F)

C

• California State Route 166‎ (8 F)
• Carretera Federal 166‎ (24 F)
• Connecticut Route 166‎ (3 F)
• County Highway 166 (Taiwan)‎ (7 F)

G

• Georgia State Route 166‎ (2 C, 11 F)

K

• Kedah State Highway K166‎ (1 F)

L

• Road V166 (Latvia)‎ (2 F)

M

• Maryland Route 166‎ (1 C, 4 F)

N

• New Jersey Route 166‎ (1 C, 2 F)
• New York State Route 166‎ (390 F)

P

• Pennsylvania Route 166‎ (8 F)
• Puerto Rico Highway 166‎ (2 F)

R

• Route 166 (Japan)‎ (4 C, 53 F)

S

• Strada provinciale 166 Casaletto Lodigiano-confine pavese‎ (2 F)
• Strada provinciale 166 della Val d'Ossola‎ (2 F)
• Strada Statale 166 degli Alburni‎ (2 F)

T

• Tennessee State Route 166‎ (2 F)
• Tokyo Metropolitan Road Route 166‎ (4 F)

U

• U.S. Route 166‎ (4 C, 1 F)
• Utah State Route 166‎ (empty)
• Utah State Route 166 (1933-1969)‎ (1 C, 2 F)
• Utah State Route 166 (1969-1990)‎ (1 C, 2 F)

V

• Virginia State Route 166‎ (4 F)

W

• Washington State Route 166‎ (9 F)