Furthermore , transport cooperation also included neighboring municipalities of Kerava and Kirkkonummi .
It was subordinated to the city councils of the four participating cities ( Helsinki , Vantaa , Espoo and Kauniainen ) .
Transport cooperation also included neighboring municipalities of Kerava and Kirkkonummi .
It was subordinated to the city councils of the four participating cities ( Helsinki , Vantaa , Espoo and Kauniainen ) .