THE six additional electronic road-pricing (ERP) gantries slated to come online in November may not be activated at once, said Transport Minister Raymond Lim on Friday.

Mr Lim, speaking at a Press Club luncheon, said traffic flow on several roads in the city has improved since the Land Transport Authority unveiled a slew of ERP changes in July.

'If this is sustained, then LTA will be happy to review the plan,' the Minister said. 'It may then need to put up only a few gantries rather than all six.'

The new gantries are on Commonwealth Avenue, Jalan Bukit Merah, Serangoon Road, Alexandra Road, Ayer Rajah Expressway (westbound near Alexandra Road) and Pan-Island Expressway (westbound near Eunos). They were among two dozen or so gantries added to Singapore roads this year.

Although the gantries have been built, not all have been switched on. In places where they are up and running, the impact has been noticeable. Five new ones along the Singapore River, along with extended operating hours for others, have improved travelling speeds in the city.

Motorists who had been bracing themselves for the six new gantries are keeping their fingers crossed.

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