Japan Post Co. will conduct a trial of self-driving delivery vehicles on public roads in Tokyo next week with an eye to introducing a fleet by 2020 to cope with driver shortages.Ahead of the trial, the company held a ceremony at its headquarters in Tokyo on Wednesday and demonstrated a self-driving vehicle on a nearby public road.Japan Post President Kunio Yokoyama said at the ceremony that the company has a "social responsibility" to offer delivery services in a sustainable manner. "The introduction of self-driving vehicles is a pressing agenda," he said.In the trial, an autonomous vehicle…READ FULL ARTICLE