I live in Salt Lake County, just outside SLC.

I have a copy of SLC bicycle law in my wallet.

It says I should have a bicycle license.

Is this even necessary, like similar to driver's license?

Also, what is the maximum pre-caution protection for a road commuter who has to share the road with motor vehicle drivers, who might be inconsiderate or distracted?

In my view, the maximum protection:

Good quality helmet (Giro or similar)

Front and rear electric light

Bicycle gloves

Ankle reflector

(for "aggressive by being insistent on bicyclist's right to use the road on the right" commuting/road cycling) Elbow and knee pads

Items packed inside backpack or seat bag, i.e. portable first aid kit, multiple-function tool set, tube damage patch kit and necessities

Tightly secured bicycle portable pump (mine was stolen

I have to deal with inconsiderate drivers sometimes. Defensive bicycling is a skill that is needed.