Can I drive a foreign-registered car without an IU on ERP-priced roads?

Ans: Yes, you can drive on any ERP-priced roads during ERP operational hours without installing an IU in your car. You will be charged an ERP fee of S$5 for each day you drive on ERP-priced roads.

This fee is payable with your Autopass card when you depart from the checkpoint. Just remember to have your Autopass card topped up (at 7-Eleven stores, selected petrol stations, top-up booths near the checkpoints and local bank ATMs) with sufficient cash balance to pay for ERP fees, VEP fees and toll charges before you proceed to the checkpoint.

Please note that there is no Autopass card top-up facility within the checkpoint premises.
For details please visit of Singapore Land Transport Authority.