Explained in plain English

Why are off-road bikes illegal on roads?

Off-road bikes, like those involved in today's incident, are designed for unpaved terrain and often lack essential features required for road use, such as lights, indicators, and proper registration. Riding them on public roads, including tunnels, is illegal and dangerous due to safety risks for both the rider and other road users. This can lead to serious accidents and disruptions, as seen in the Queensway Tunnel.