Bingo. You have <5kph for walking, 10-25 kph for this whatever-it-is-which-I-hope-grows, and 50+ for cars. They can mix occasionally, separated with paint or go

Bingo. You have <5kph for walking, 10-25 kph for this whatever-it-is-which-I-hope-grows, and 50+ for cars. They can mix occasionally, separated with paint or good will, but as much as infrastructure permits we need all three.