Fredrikinkatu is mostly a northbound one-way street. Helsinki tram lines 1 and 3 run on Fredrikinkatu in both directions between Viiskulma and Bulevardi. There's a disused section of tram track between Urho Kekkosen katu and Arkadiankatu.
The majority of the buildings along Fredrikinkatu are full of small shops and boutiques, especially in the area between Iso Roobertinkatu and Eerikinkatu.
Intersecting streets
Merimiehenkatu
Punavuorenkatu (to the left) / Ratakatu (to the right), Fredrikintori Square is in the intersection