Area Licensing Scheme

The Singapore Area Licensing Scheme (ALS) (Malay: Skim Perlesenan Kawasan Singapura) was a road pricing scheme introduced in Singapore from 1975 to 1998 that charged drivers who were entering downtown Singapore. This was the first urban traffic congestion pricing scheme to be successfully implemented in the world.^[1] This scheme affected all roads entering a 6-square-kilometre area in the Central Business District (CBD) called the "Restricted Zone" (RZ), later increased to 7.25 square kilometres to include areas that later became commercial in nature. The scheme was later replaced in 1998 by the Electronic Road Pricing.