Planned tram projects in Helsinki
The city of Helsinki and the neighbouring city of Vantaa have plans for a radical expansion of the Helsinki tram network within the 2020s and 2030s that would more than double the length of the network from 2021. If completed, the plans would both extend the current tram lines and build new light rail lines.
Source: Wikipedia — Planned tram projects in Helsinki (CC BY-SA 4.0)