London congestion pricing (2003)
London began charging drivers to enter central London, using automated cameras to enforce payment. Traffic congestion dropped by about 30% in the first year, and bus ridership rose 6% as travel times became more reliable.
The program reduced car volume substantially and generated revenue that funded transit improvements. It faced early legal challenges but survived.
It demonstrated that automated camera enforcement can change driver behavior at scale, even in a densely populated historic city—directly relevant to Boston's ambitions.
While London's program is about pricing, not bus lanes, it shows that camera-based enforcement can overcome legal and public skepticism and deliver lasting transit benefits.
