[mynegation]

People can barely keep one set of rules in their head. Having to maintain two set of rules will hardly make anyone safer.

[The-Bus]

I would hope that drivers understand how to interact with motorcyclists, trucks, emergency vehicles, and trains all of which have separate sets of rules and could interact with a car.

[joshlemer]

There are already different sets of rules for trucks, cars, bicycles, and pedestrians.