There was no mechanical defect to explain the tragedy, but the inquest heard that the road surface was worn and was resurfaced a few weeks after the accident.
"At three of these locations our investigations concluded that the noise should be mitigated through the installation of low noise surfacing materials when the existing surface is worn out, in accordance with our maintenance policy, " said an agency spokesperson.
The next astronauts to step out onto the dusty gray surface of the moon will be wearing a suit that's very different from the bulky white armor worn by the Apollo explorers.