An important goal of the Hakaniemenranta detailed plan solution is to provide for new public waterfront areas on both sides of Siltavuorensalmi. The recreation areas will be expanded and better connected to the seashore and water. The new waterfront areas act as a meeting place for Hakaniemi and the entire expanding Helsinki city centre area.
The detailed plan solution is based on the solution included in the winning proposal of the idea competition arranged for the planning. One of the most important planning elements of the winning proposal of the idea competition is the shape of the landscape in Siltavuorensalmi. The water area becomes wider outside Merihaka and narrower when going towards the Pitkäsilta bridge. The sound opens up towards the open sea and, at the same time, leads to Eläintarhanlahti and Töölönlahti.
Signe Brander's terrace is a new public shore area, which is constructed outside Hakaniemi and Merihaka partly into the sea on reclamation ground. The terrace is connected especially in the east to the new Merihaanpuisto park and in the western end to the Hakaniemi market square and its surroundings.
The waterfront promenade is a nice and important part of the new shore area in Hakaniemenranta. The Merihaanpuisto park will be founded on ground reclaimed from the sea.
Street and park areas on the north shore of Kruununhaka are rearranged. The Siltavuorenranta street is moved closer to the quarters of Kruununhaka, which will turn the Kirjanpuisto into a wider, brighter sea shore park.