Finnish national road 45

Highway 45
Tuusulanväylä, Hämeentie
Route information
Maintained by the Finnish Transport Agency
Length51 km (32 mi)
Existed1996–present
Major junctions
FromHelsinki
ToHyvinkää
Location
CountryFinland
Major citiesVantaa
Highway system
Kt 44 Kt 46

The Finnish national road 45 (Finnish: Kantatie 45; Swedish: Stamväg 45) is the 2nd class main route between the major cities of Helsinki and Hyvinkää in southern Finland. It runs from Käpylä in Helsinki to Hyrylä in Tuusula as a motorway called Tuusula Highway (Finnish: Tuusulanväylä, Swedish: Tusbyleden), where it continues to the edge of Hyvinkää and national road 3 as a smaller road called Hämeentie.