> What does this even mean?

It means over 18,600 engineering hours have been spent working on vehicle safety. This is a pretty common metric.

However, it's one of those metrics that tends to be kind of meaningless. Vehicle safety team uses GPUs, so lets bill all GPU driver teams to the metric... that sort of thing

But they say years, not hours. Either it's a typo or nvidia has a ton of engineer and they all work 24/7.