A closer look

Charging a semi-truck the same toll as a compact sedan is bad economics. Singapore's Electronic Road Pricing gantries don't just read license plates; they are armed with precisely calibrated stereoscopic lasers. As you blast underneath at 90 km/h, the sensors instantly construct a 3D wireframe of your vehicle, measure the physical footprint, calculate the toll tier, and deduct funds from your dashboard unit before you've even cleared the shadow.