The fact that some people think we need to separate different modes of transportation is the reason why people aren't trying alternative modes of transportation like cycling. Legally, there's a single set of rules of movement that apply to all vehicle drivers:
1. Keep to the right side of the road
2. Yield to through traffic before entering a roadway
3. Yield to oncoming traffic when making a left turn
4. Make right turns from as close as practicable to the right edge of the roadway
5. Make left turns from as close as practicable to the center of the roadway
6. The vehicle in front has the right of way over the vehicle behind (first come, first served).
Follow those rules no matter what vehicle you're using and there really aren't any issues. I've ridden tens of thousands of miles over nearly 20 years on roads and never had a problem by riding in a predictable manner, signaling my intentions in advance, and following those rules.