How many ERP gantries are there in Singapore?

70.

Singapore’â„¢s Land Transport Authority lists 70 Electronic Road Pricing (ERP) gantries throughout the country as of January 2009. The most number of gantries are concentrated in the Central Business District (CBD) with 25, followed by the Orchard Cordon with 12. The Straits Times reported in January 2010 that there are 36 ERP gantries in the CBD.