The development of the regions is channelled more and more towards development corridors crossing administrative borders. The region of Helsinki-Uusimaa (Finlands capital region) is preparing the launch of a new comprehensive regional plan, and a key part of this preparatory work is prioritising focus areas of development on regional structure and on main transport networks. This work was supported by profiling work of Southern Finland’s development corridors conducted by the MDI. The work contained a summary of the Southern Finland’s development corridor analyses, an online survey and four workshops along corridors (Tampere, Turku, Kotka and Lahti). Our partner in the visualisation of results was Nitro ID. The work was completed in February 2017. The final report (in Finnish) can be found on the webpage of Regional Council of Helsinki-Uusimaa.