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 pay-as-you-use principle of ERP makes motorists more aware of the true cost of driving. This way, road usage can be optimised.

	Charges are levied on a per-pass basis and rates are set based on traffic conditions at the pricing points.
	A motorist is encouraged to decide whether to drive, when to drive and where to drive.
	He may choose a different route, mode of transport, time of travel, or not travel at all.
	Those who choose to pay and stay on the road will enjoy a smoother ride.

The first road pricing scheme, known as the Area Licensing Scheme (ALS), was introduced in the Restricted Zone (RZ) in 1975. The scheme was subsequently extended to major expressways with the Road Pricing Scheme (RPS).

In September 1998, the ERP system replaced the manual system for the RZ and expressways. In September 1999, ERP was extended to some of our key arterial roads beyond the RZ.

Access the Interactive Map for ERP rates and gantries

Since February 2003, motorists have been enjoying savings of 25 cents to $2 when passing through most of the ERP gantries.

To discourage motorists from speeding up or slowing down to avoid paying higher ERP charges, the LTA decided to make ERP changes more gradual.

Graduated ERP rates have been introduced for the first five minutes of the time slot with a higher rate. If the next period has a lower ERP rate, the new rate is introduced for the last five minutes. This applies to cases where the change in the rate is at least $0.50, depending on vehicle type. For car drivers, the graduated ERP rate applies where the change in rate is at least $1.

Because the graduated rate is introduced in the more expensive band, it means overall lower ERP charges for motorists.

Motorists who pass through an operational ERP gantry without a properly-inserted CashCard in the IU, or one with insufficient monetary value in the CashCard to pay the ERP charges, will receive a letter within a few days of the violation requesting them to pay the outstanding ERP charge plus an administrative fee of $10, within two weeks from the date of the letter. The administrative fee is reduced to $8 if payment is made electronically via the following channels:

	LTA's One.Motoring website
	AXS stations
	Self-service Automated Machines (SAMs) at post offices
	vPost
	Automated teller machines
	Telephone and internet banking services

If you are a SingTel mobile phone subscriber, you may wish to know that SingTel has a service called Easi-ERP which enables you to pay your outstanding ERP charges via your mobile phone bill at a reduced administrative fee of $4 per transaction (in addition to the outstanding ERP charges). Please note that this applies only for violations occurring after you have subscribed to the service. To use the service, please dial *377 and follow the instructions that will be sent back to you via SMS. A one-time $1 subscription fee is levied by SingTel.

Alternatively, payment for ERP violations can be made at Post Offices islandwide. Please bring the payment letter along when doing so.

You may also come by the LTA office at 10 Sin Ming Drive, Singapore 575701 or mail us a cheque at Singapore Post Centre Post Office, P.O. Box 491, Singapore 914017 quoting the vehicle number and notice number on the reverse of the cheque.

Click here to view frequently-asked questions on ERP.

Having problems with your IU? Send your vehicle to the authorised inspection and other appointed centres.

IUs are covered by a 5-year warranty against manufacturer's defects. You will have to pay for a replacement should your IU become faulty after its warranty period. You may check the warranty period of your IU by calling

our customer service line at 1800-CALL LTA (1800-2255 582).

Last Updated on 06/12/2011