The following highways are numbered S1
China
S1 Expressway (Guangdong)
S1 Expressway (Henan)
S1 Expressway (Hubei)
S1 Expressway (Shandong)
S1 Expressway (Shanghai)
S1 Expressway (Sichuan)
S1 Expressway (Tianjin)
S1 Expressway (Tibet)
S1 Expressway (Zhejiang)
Georgia
Poland
United States
New Jersey Route S1 (former)
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