It's not a either or thing. Both help. I'm a Dutch guy living in Berlin. Berlin in the last few years has upgraded their infrastructure quite a bit to make thin

It's not a either or thing. Both help. I'm a Dutch guy living in Berlin. Berlin in the last few years has upgraded their infrastructure quite a bit to make things safer for cyclists. This is of course something that my home country the Netherlands started doing after the oil crisis in the 1970s. The result of decades of policies and regulations is that that is now a very safe place to move around by bike. There are very few traffic situations where cycling traffic is mixing with normal road traffic. That really cuts down on the accident rate. Berlin has some catching up to do on that front. Here in Berlin, the leading cause for traffic deaths is trucks taking right turns at speed and not noticing the cyclists in their dead angle. Happens a couple of times per month. The way to prevent that is 1) mirrors/cameras 2) installing concrete curbs to force the trucks to take the turn properly (slow down, take a wider turn so they can actually see what's lurking in their dead angle). In the Netherlands neither of those things are optional. Almost any significant right turn will have those curbs and they really work. Also crossings are super well organized and there's just very little room for misunderstandings. Any place with abnormally high accident rates gets prioritized for a little makeover. And forget about being allowed on the road without the required mirrors. This Volta truck has a great design that should help enormously in countries with less regulation / established policy on this front. These are designed to go into areas where normal traffic isn't even allowed. So lots of pedestrians and cyclists. Even in the Netherlands they should help. You never get to perfect safety so all little bits help. And I imagine the enhanced visibility is helpful in general for drivers.