Helsinki is planning a 290 million euro underground tunnel to redirect heavy port traffic from city streets. The 1.9 kilometer twin-tube Port Tunnel would move vehicles from West Harbor underground to Länsiväylä highway.
The tunnel aims to open in early 2030s and enable expansion of Helsinki Port operations. It would concentrate all Tallinn ferry traffic to West Harbor while Swedish route ferries would move to Katajanokka.
Currently over 10,000 cars and 1,200 heavy vehicles pass through the port daily. By 2040, traffic could reach nearly 17,000 cars with 35% using the tunnel.
Environmental concerns are mounting. The planned route threatens endangered species habitats including rare liverwort mosses. The chosen alignment through Lapinlahti Park was selected primarily because it's cheaper and faster to build.
Critics question whether the tunnel will truly relieve congestion. While improving traffic flow during peak hours, concentrating vehicles might increase overall car traffic in Jätkasaari and Ruoholahti districts.
City council will decide on the tunnel this autumn. Legal challenges could delay construction due to required permits for disturbing protected habitats.
The funding model raises questions too. Helsinki Port covers construction costs through port fees, but some politicians worry higher fees might divert truck traffic to Vuosaari port instead.
This represents a classic urban development dilemma - balancing economic growth against environmental protection and quality of life for residents.