EACH time the tolls on Singapore's roads rise, a chorus of complaints sounds from drivers across the island.

But the reality is that less than half of all motorists pass through Electronic Road Pricing (ERP) gantries on their way to work.

A Singapore Press Holdings survey of 295 motorists found that 46 per cent fork out money for the privilege of driving on the island's roads.

Of those, about 70 per cent pay $3 or less every morning.

The survey was done over three days in mid-November, about two weeks after ERP rates were raised by 50 cents.

That brought tolls on the Central Expressway from the Pan Island Expressway to $5 between 8.30 and 9am - making it Singapore's costliest road.

Read the full story in Tuesday's edition of The Straits Times.