Electronic Road Pricing (ERP)

ERP Gantry

What is ERP?

ERP is an Electronic Road Pricing System used in managing road congestion. Based on a pay-as-you-use principle, motorists are charged when they use priced roads during peak hours.

ERP rates vary for different roads and time periods depending on local traffic conditions. This encourages motorists to change their mode of transport, travel route or time of travel.

What are its benefits?

  • Minimises traffic volume in heavily used roads in the CBD and Orchard areas, as well as major expressways.
  • Optimises usage of the road network by encouraging motorists to consider alternatives.
  • Provides a fair price for motorists. Charges are based on usage—those who use the roads pay more; while those who use the roads less frequently or who travel during non-ERP hours pay less or don’t need to pay at all.
  • No more monthly/daily licences.  Motorists no longer need to buy paper licences to drive through high traffic areas in the CBD.
  • No human error. ERP’s reliable and fully automated system operates 24 hours. Its central computer system ensures gantries are always working properly.

Operating Hours of ERP Gantries

Please refer to One.Motoring for more information on Rates and Operating Hours of ERP Gantries.

Why do we need ERP?

Traffic congestion is costly to the individual and society. It results in the loss of productive hours, environmental pollution, wasted fuel and adverse health effects. To keep traffic moving, LTA will continue with a holistic and integrated approach using all the tools available, including building more roads, regulating vehicle growth, implementing traffic engineering solutions and promoting the use of public transport. In addition to the various measures, we also need to manage traffic demand through ERP.
With more vehicles on the road, ERP remains effective in addressing current and future traffic conditions and ensuring motorists continue to have a smooth journey.

See ERP in Singapore – What’s Been Learnt from 5 Years of Operation
See ERP in Singapore, A Perspective One Year On

How does ERP work

Learn more about In-Vehicle Units (IU)

How are ERP rates determined?

ERP rates are determined by a quarterly review of traffic speeds of priced roads and during the June and December school holidays. Based on an optimal speed range of 20-30 km/h on arterial roads and 45-65 km/h on expressways, ERP rates will be adjusted accordingly.

The ERP charges you pay depends on:

  • Your Passenger Car Unit (PCU) equivalent
    Cars, taxis and light goods vehicles are 1PCU. Motorcycles are 0.5PCU; heavy goods vehicles and small buses are 1.5PCU. Very heavy goods vehicles and big buses are 2PCU.
  • The time you enter the restricted zone
    During peak hours, charges change every half hour to take into account traffic volumes. This helps to spread the traffic flow over a longer period.

Graduated Electronic Pricing

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

To discourage motorists from speeding up or slowing down to avoid paying higher ERP charges, we made 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 S$0.50, depending on vehicle type. For car drivers, the graduated ERP rate applies where the change in rate is at least S$1.

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

Use the interactive map on ONE.MOTORING to check ERP rates for each gantry location.

ERP Violations

When you pass through an operational ERP gantry without a properly inserted CashCard in the IU, or one with insufficient monetary value in the CashCard, you will receive a letter within a few days of the violation. You must pay the ERP charge plus an administrative fee of S$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
  • SGQR
  • AXS stations
  • Self-service Automated Machines (SAMs) at post offices
  • vPost
  • Automated teller machines
  • Internet banking services

You may also drop 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.

Read Frequently-Asked-Questions on ERP.

Background on ERP

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 1998, ERP replaced the previously manual Area Licensing Scheme for restricted zones and Road Pricing Scheme for expressways.

The Future

The Future

The advancement of technology has enabled us to develop the next-generation ERP system. This new system will allow us to continue to manage traffic congestion effectively while providing the technology platform for us to develop useful value-added services that bring greater convenience to motorists and manage incidents on the roads.

The new Global Navigation Satellite System (GNSS)-based ERP system will be operational from 2020.

The existing In-Vehicle Unit (IU) will be replaced with a new On-Board Unit (OBU) to support these value-added services for motorists:

  • Automatic payment for Off-Peak Cars usage;
  • Electronic payment for roadside parking;
  • Electronic payment for checkpoint tolls; and
  • Provision of relevant real-time traffic information tailored to one’s location

LTA has appointed NCS Pte Ltd and Mitsubishi Heavy Industries Engine System Asia Pte Ltd to develop the Next-Generation Electronic Road Pricing System.

Press release: Tender awarded to develop Next-Generation Electronic Road Pricing System



Did you know

Singapore was the first city in the world to manage road congestion by implementing an Electronic Road Pricing system.  ERP has since been used as a reference by other cities like London.


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).


Read Frequently-Asked-Questions on ERP.