@skyfaller asks:

Q3. What communications systems do people use for talking with other bicyclists while riding?

We used these Bluetooth helmet "radios" by Sena, and they were extremely helpful on long rides where we couldn't bike side by side, such as when we moved house by bike. But these were mediocre helmets, if either the Bluetooth or helmet dies you must replace both, and annoyingly you had to pair the helmets every time.

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@skyfaller @bikenite A3. I'd been really curious about the bluetooth radio systems, but they seemed expensive, and the use case seemed sorta shaky at best, so I didn't go for it.

@Heyweldon might have a good answer for how Kidical Mass volunteers coordinate.

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