It is hoped ‘innovative’ 24-hour design will also cut carbon emissions, as demand for delivery services soars

Six decades after the bullet train first whisked passengers between Tokyo and Osaka, authorities in Japan are planning to do the same for cargo, with the construction of a “conveyor belt road”.

The automated cargo transport corridor, which will connect the capital with Osaka, 320 miles (515km) away, is seen as part of the solution to soaring demand for delivery services in the world’s fourth-biggest economy.