There is certainly a common thread through the solutions that are out there. We do not have to reinvent solutions with every airport we go to, but just because a solution is right at one airport, it may not be immediately transferable to another airport. That is, flight routings into Vancouver have the option of coming in over the water, but that is not a solution that is available to Toronto Pearson. Yes, you can look at flight routings and try to make use of industrial corridors or rural areas, but it is not immediately transferable.
Keeping aircraft higher certainly is something that is probably achievable at a lot of airports, and it reduces noise, but again, you have to look at the local environment to see what obstacles are there, be they man-made obstacles or mountainous terrain, before you can conclude whether that solution is applicable in that area.
The distribution of residential communities around the airport again has an impact on what solution is right. If you look at the best practices report or the Toronto independent airspace review, when they're translated—and I appreciate one of them is a sizable document to translate—you will find that there is a common thread through there and you will be able to find elements that could be taken and considered for other airports, but bespoking them is still required.