Upgrade To Electronic Road Pricing (ERP)
Overall, the ALS was successful in ensuring smooth traffic flow in the Central Business District. After about 10 years of planning and testing, in September 1998, the Area Licensing Scheme was terminated as Singapore upgraded to the current Electronic Road Pricing system, which is completely automatic and allows passing the control gantries at normal speeds. The ERP system is still in use in Singapore, and many similar schemes were based on Singapore's ERP system, i.e.London Congestion Charge, Edinburgh Congestion Charge etc.
Read more about this topic: Singapore Area Licensing Scheme
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