Electronic Road Pricing (ERP)

Electronic Road Pricing (ERP) is an electronic system of road pricing based on a pay-as-you-use principle. It is designed to be a fair system as motorists are charged when they use the road during peak hours.
The ERP system uses a dedicated short-range radio communication system to deduct ERP charges from CashCards. These are inserted in the In-vehicle Units (IUs) of vehicles before each journey.Each time vehicles pass through a gantry when the system is in operation, the ERP charges will be automatically deducted.The speed limit on most expressways is 90 km/h. However, a few stretches still retain the old 80 km/h speed limit. To help in enforcing the speed limits, there are stationary speed cameras at several locations:

• East Coast Parkway between Benjamin Sheares Bridge and Fort Road
• Ayer Rajah Expressway near Buona Vista Flyover
• Bukit Timah Expressway between Choa Chu Kang Road and Kranji Expressway
• Pan-Island Expressway between Bukit Timah Expressway and Eng Neo Avenue
• Central Expressway between Jalan Toa Payoh, Upper Serangoon Road junction and Braddell Road

In addition to these cameras, the Traffic Police may use portable laser-guided speed cameras (called Police Speed Laser Cameras) to catch motorists without being noticed. These cameras are operated by TP personnel from overhead bridges or flyovers. The exact locations of these speed cameras are unannounced - the Traffic Police provide only a list of roads where they may be used.

The main Electronic Road Pricing of Singapore City are the Pan-Island Expressway, EastCoast Parkway, Ayer Rajah Expressway, Central Expressway, Tampines Expressway,Seletar Expressway Kranji Expressway, Bukit Timah Expressway and Kallang-PayaLebar Expressway.