thanks everyone..
additional info here;
Driving in from Malaysia
Here are some requirements for foreign-registered cars entering Singapore:
(a) Vehicle Entry Permit (VEP) and Toll Charges
Foreign motorists are required to pay tolls and a Vehicle Entry Permit (VEP) charge at the checkpoints when they drive into Singapore. Payments have to be made using the electronic smartcard, called the Autopass Card.
The Autopass Cards are sold at the primary clearance/immigration booths or VEP/Tolls office at Singapore checkpoints. Motorists are required to produce valid road tax discs and insurance certificates for their cars when buying the Autopass Cards.
VEP fees are charged at SGD n20 per day on Monday to Friday (from 0200 hrs to 1700 hrs).
There is no VEP charge on Saturdays, Sundays and all Singapore Public Holidays as well as from 1700 hrs to 0200 hrs on weekdays.
Toll charges are calculated on a per trip basis. Car drivers have to pay toll charges on arrival and departure from Tuas Checkpoint (SGD 3.20 per trip) but only on departure at the Woodlands Checkpoint (SGD 1.20 per trip). Motorcyclists are not charged at the Woodlands Checkpoint, but have to pay SGD 0.50 when departing from and arriving in Singapore at the Tuas Checkpoint.
For more information, please refer to FAQs on driving into Singapore or visit the Land Transport Authority website (click on Motoring Matters, Guide to Driving Into and Out of Singapore).
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Electronic Road Pricing (ERP)
All motorists driving into the city or travelling on certain major roads and expressways are required to pay an Electronic Road Pricing (ERP) fee during the ERP operating hours. ERP is a scheme to help keep Singapore roads congestion-free.
For foreign motorists intending to pass through ERP-priced roads during its operational hours, they can either choose to install or rent an In-Vehicle Unit (IU) to pay ERP fees. For those who do not wish to rent or install an IU, they can choose to pay a fixed ERP fee of SGD 5 per day, regardless of the number of times they pass through an ERP gantry in the day. This will be paid together with their VEP and toll charges via the Autopass card when they depart from Singapore. This fixed fee scheme starts from 1 Sepember 2003 onwards and is only applicable for those who do not have an IU installed in their foreign-registered cars.
More Tips On Driving into Singapore