10-15 fps is probably OK outdoors on a camera facing the street. You don’t have to run all cameras at the same framerate, BTW.
It actually depends more on how far the camera is from the road. Go further, you can get away with a lower framerate since a moving object is in the image for a longer time.
Filming out of your window = lower FPS.
Camera on your mailbox post = higher FPS.
