ERP rates at some gantries on AYE and CTE to rise by $1 from 12 April: LTA SINGAPORE — The Electronic Road Pricing (ERP) rates at certain gantries at certain stretches on the Ayer Rajah Expressway (AYE) and Central Expressway (CTE) will be increased by $1 from 12 April amid increasing traffic volume with progressive easing of safe management measures, the Land Transport Authority (LTA) said on Monday (5 April). “Specifically, it has been observed that there appears to be a structural change in morning peak hour traffic. Instead of very high traffic volumes concentrated in a short window, we see heavy traffic across a longer duration, from 7am to 10am,” the LTA said in a statement.