Here is how I approach my camera settings so I can then forget about them and just shoot. You cannot figure out how to set your camera if you don’t first understand the light. To freeze motion in people, I like to use 1/250th of a second as a base number for the shutter speed.
That number or faster and there will be no motion blur in people.
If the light is fairly even, you won’t have to worry much.
So what I will do is set my camera to the ideal settings for the shady side of the street.
This means that I usually set my camera to around f/8 or f/11 (sometimes f/5.6) and ISO 800 (you can tweak these depending on how dark the shady side really is).
You can go down to 1/160th or 1/125th at dusk or night if you need to and you should be okay, but slower than that and you risk motion blur (unless you want motion blur of course).
For the most part, I like to use a small aperture (large depth of field) between f/8 and f/16 when I can.
The reason why I don’t shoot Shutter Priority on sunny days is that so much light is hitting the camera if I am shooting at 1/250th or even 1/500th and ISO 800 in the sunlight, my aperture will need to be f/32 or f/64.