In my view, one challenge is the political will of some councils. Sometimes, we start a project, we conduct studies, then an election comes along. The council changes, the new council members decide not to pursue the project. We also sometimes find that there are other priorities.
Giving the studies more visibility is a challenge as well. In a lot of cases, they tell us a lot of interesting things that most communities are not aware of. We do a lot of work from our end, through our conferences and our website, to give the ideas more visibility. But more effort could be put into sharing the ideas with a view to having other people get the projects going.