Last week Sentosa announced that with the opening of their Resorts World Sentosa, they'll be increasing charges for private vehicles entering into Sentosa. Currently it costs $2 per car with additional $2 per passenger. From January 18 onwards though it'll cost $6 to drive into Sentosa on weekdays between 7am and just before noon, and $7 per car on weekends, regardless of the number of people in the car.
Apparently management on the island are amending the costs of driving to the island to encourage visitors to car pool, or if not, rely on the public transport system. This is done due to the expected overcrowding once the Resorts World Sentosa opens.
There's more.......parking! Parking will become more expensive with the island switching to time based charges.