On: 310-mile automated cargo conveyor will replace 25,...

[Someone]

100km is 200km round-trip. At 100km/hour that’s 2 hours (which, reading https://en.wikipedia.org/wiki/Speed_limits_in_Japan#Summary, is the absolute best possible)

Also, they’re talking of 500 km, or 1,000 km round trip. That’s easily a day of driving.