Positive for Stop Signals: Pedestrians are able to move to street to street without the risk of being hit
However the negative side of this is that drivers are more than likely to get caught in traffic considering that if it is place in a big city pedestrians are gonna be coming in more than letting drivers pass through.
Roundabouts would be a good choice the reason is that Drivers don't need to drive somewhere with taking risk to crash so long as they stay on the right side....