Yes, obviously the Waze app currently isn't designed to track but some apps do. I'm just pointing out the possibilities. From what I understand there is already devices ( or apps ) that can track a group of cyclists and show each user where everyone is...although you don't know who is who as it just shows positions.

I think this could be done if the people who designed the Waze app chose to create an updated version. The device or app would likely only update your ( the cyclist ) position every 30 sec or so when moving and only every minute or so when sitting still. The person that said there would be too many notifications on the screen if moving cyclists were shown doesn't realize how that is so untrue. First, not every cyclist would be using it ( how many cyclist use lights when needed ) and second, since I drive for a living I don't see cyclists on every road I drive every day. In an urban environment this could change but like every app the users of the app could likely choose to turn off notifications of moving cyclists or just to remove the icon ( or vise-versa ). That said I don't think many people would do that, particularly if they themselves cycle.

The down side is that not every car on the road is going to be using the Waze app and even the ones that are might not see/hear the warning prompts if they are talking on the phone or playing music loud. What's interesting about the idea is that it could also be expanded for things like, "Moving ERV's, school buses", things we are most concerned about when it comes to protecting human lives.

Looking a bit forward, if such a device or application existed it might even start to be included into newer vehicles much like OnStar and GPS is. I figure it this way; If you can tolerate prompts from the current app the occasional prompt for a cyclist isn't going to bother you. Even if only 20% of the vehicles on the road were using it that could be a major step in promoting the safety and lives of the everyday road cyclist.