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| Route information | |
| Length | 30.4 km (18.9 mi) |
| Location | |
| Country | Norway |
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County Road 171 (Norwegian: Riksvei 171) is a 30.4 kilometres (18.9 mi) county road that runs between Gran in Sørum and Finstadbråten, Aursmoen in Aurskog-Høland, Norway.