I think this could be really useful on (and waiting for) public transport to ask questions about planning - wouldn't you be much more likely to contribute to the dialogue if it were quick, easy and convenient to do so? People on trains almost ubiquitously have their phones out - so may as well put them to use! Provided the data is appropriately analysed and taken into consideration, this could provide another way to increase consultation and communication between policy makers and the community.
Read more here.