Radical move by the mayor of London. He is imposing a $49 fee for the most fuel inefficient vehicles to enter central London, 3 times the normal $16 fee. And, the most fuel efficient cars will gain access into central London for free.
The standard congestion tax has been in place since 2003, but the differential pricing rate will go into effect in October of this year.
Recently, Michael Bloomberg endorsed a plan to charge vehicles $8 to enter NYC below 60th street to relieve congestion and pollution.
These localized plans will relieve traffic congestion, but unless the majority of cities adopt similar plans, it will likely only have a negligible effect of emissions and CO2 production.