"Our road users lack discipline!" is a lament I hear often, especially in developing countries. For example, differing views over road-user discipline have played a big role in the problems of Delhi's BRT project (try googling Delhi BRT discipline ). Alas, respect for most traffic rules depends on consistent enforcement. It would be nice if all traffic rules commanded so much respect that they did not need to be enforced. But unfortunately most important traffic rules fall outside our internal moral codes. Even the rules with serious safety implications, like speed limits, do not seem like an ethical issue to most people. So without enforcement, many people ignore traffic rules. Singapore's bus lanes are no exception. Singapore, for example, is finding the need to beef up its enforcement of its bus lanes. Bus lanes are actually not the toughest enforcement issue in urban transport but they are an important one, despite their humble image. Soon, Singapore will join ot...