Right-hand traffic rule

The Right-hand traffic rule is a convention that coordinates strangers by giving them a common expectation about where to drive. In the book, its significance lies not in the particular side of the road chosen, but in how a rule shared by everyone turns a recurring coordination problem into routine behavior.

Purpose and Operation

Driving on the right-hand side of the road illustrates the practical force of a convention: it is easier for everyone to follow one rule than to guess what an approaching driver will do. The rule replaces uncertainty with a common pattern, allowing road users to act without negotiating each encounter individually. The contrast is consequential: a collision between pedestrians is an annoyance, while a collision with an oncoming car can be far more serious.

Conventions and Coordination

The rule is one example of how culture enables coordination by regulating behavior. Some conventions are explicit and carry the force of law; others emerge through shared practice. Both can help people with little personal connection organize their actions. By establishing expectations in advance, conventions preserve order and stability while reducing the cognitive work required to get through ordinary situations.

The book also contrasts established rules with conventions that can arise quickly when they solve a problem. A shared pattern need not depend on continuous top-down direction: under the right conditions, people can adapt to one another and settle into coordinated behavior. The Right-hand traffic rule exemplifies the same broader principle on a familiar, legally regulated scale: a common rule makes individual choices more predictable and reduces the risk of conflict.