Category:Roads numbered 166

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

A

• A166 road (England) (10 C, 3 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)

I

• Ibaraki Prefectural Road Route 166 (2 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)

O

• Ohio State Route 166 (32 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)
• Texas State Highway 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)