Every region develops its own implicit rules in addition to the explicit and (usually) legally enforced traffic rules.
Advice and Consent:
Polite reminders of the formal rules may be provided, as at these traffic lights.
Rights of way:
Locals have the confidence to claim their share of space.
Contested pathways:
Visitors require some induction into the local community of practice.
Reflective observation helps.
Under and Over:
Some traffic segregation is provided.
This city centre pedestrian subway entrance is separated from the roadway by a cycle track.
Incremental improvements:
The piecemeal upgrading of highways contributes to congestion in the short term, as with the creation of separate carriageways here.
Marginal activities:
Business and social activities take place at the edge of the road.Police traffic control podium near Marina Beach.
A wide variety of relative size and relative speed.