The development of the regions is channelled more and more to development corridors crossing administrative borders. The Region of 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. As a result, different colour-coded development corridors were drawn: Blue to Turku, Orange to Tampere, Green to Lahti and Kouvola and Red to Kotka. Our partner in visualisation of results was NitroID. The final report (in Finnish) can be found on the webpage of Regional Council of Helsinki–Uusimaa.