Smart pesestrian & bike lightsÄlykkäämpi
I would be interesting to see bicycle traffic lights go green if a bike (or pedestrian) is approaching to a cross and based on the traffic situation (e.g., if there are no cars driving). Reaching to the call button is always a hassle, especially on a bike. This would especially be useful in roads with less traffic but that still have lights.
I think similar projects have been implemented in Netherlands (https://www.core77.com/posts/54559/How-Smart-Traffic-Lights-in-Holland-Allow-Cyclists-Pedestrians-Motorists-and-Mass-Transit-to-Safely-and-Efficiently-Co-Exist).
Though security of these should be tested. There is always the risk that people might assume right of passage even when that is not the case.