Category:Roads numbered 421

• Signs for roads numbered 421 (1 C, 16 F)

A

• A421 road (England) (1 C, 21 F)
• Aichi Prefectural Road Route 421 (1 F)

B

• Bundesstraße 421 (4 F)

E

• E421 (4 C, 21 F)

F

• Florida State Road 421 (10 F)

G

• G0421 Xuguang Expressway (1 C, 12 F)

M

• Mie Prefectural Road Route 421 (1 F)

N

• New York State Route 421 (7 F)
• Niigata Prefectural Road Route 421 (2 F)

O

• Ohio State Route 421 (2 F)

P

• Puerto Rico Highway 421 (2 F)

R

• Route 421 (Japan) (2 C, 27 F)
• Route départementale 421 (Allier) (2 F)

S

• South Carolina Highway 421 (3 F)
• Strada statale 421 dei Laghi di Molveno e Tenno (1 C, 3 F)

T

• Tennessee State Route 421 (1 C, 1 F)
• Tokyo Metropolitan Road Route 421 (5 F)

U

• U.S. Route 421 (9 C, 1 F)