In its latest quarterly review, the Land Transport Authority said car drivers passing gantries along the Ayer Rajah Expressway - after Jurong Town Hall towards the city - will have to pay $1 from 7am to 7.30am, up from no charge now.
In the evening - between 7pm and 7.30pm on the same highway - drivers heading towards Tuas after North Buona Vista Road will likewise have to pay $1, up from no charge.
Drivers heading for the city on the Central Expressway (CTE) will have to pay $1 at the gantry before Braddell Road between 8.30am and 9am. This time slot is currently free.
SOURCE: LTA
And between 8am and 8.30am, those driving towards the city on the CTE after Braddell Road, will have to pay $4 instead of $3 now.
Gantries here include those on the Pan-Island Expressway slip road into the CTE. Rates elsewhere remain unchanged.
The next review is in May for the June school holidays.