Another very successful approach I learned and employed for brainstorming was- let's list all our assumptions about the problems and current solutions. When we do that we find that many of them are not really required, and it opens up a lot of interesting ideas.
In the traffic case, assumptions could be- we assume people need to commute, we assume spending time in traffic is a waste of time or we assume people can only drive their cars on roads
Another very successful approach I learned and employed for brainstorming was- let's list all our assumptions about the problems and current solutions. When we do that we find that many of them are not really required, and it opens up a lot of interesting ideas.
In the traffic case, assumptions could be- we assume people need to commute, we assume spending time in traffic is a waste of time or we assume people can only drive their cars on roads