Enforcement
Bus lanes can become ineffective if weak enforcement allows use by unauthorized vehicles or illegal parking on them (for example in shopping areas).
Evidence from the operation of urban arterials in Brisbane, Australia shows that a properly enforced Bus or Transit lane, operating as designed, can increase person throughput. In 2009 and 2010 traffic surveys showed that in Brisbane on a number of urban arterials with Bus and Transit lanes non-compliance rates were approaching 90 per cent. Following enhanced enforcement of the lanes, non-compliance rates dropped and overall efficiency of the Bus and Transit lanes improved with an up to 12 per cent increase in total person throughput in the lane. Average bus journeys times dropped, in some cases, by up to 19 per cent.
Read more about this topic: Bus Lane