I think this happens fairly often in Manhattan. There's lots of box trucks simply making turns at 5mph and pedestrians crossing obliviously with headphones on or looking at their phones.

Vehicle weight has a large impact on survivability, but not all the way down at 5mph. Plus, vehicles are easy to avoid at 5mph, the majority of the human population can out walk cars at that speed.

That being said, vehicle size is another uncomfortable subject when it comes to road deaths. If we really cared about not killing people on the road, we’d take a long, hard look at what cars we allow to operate on our roads.

Delivery trucks have the benefit of being obviously necessary; I am glad that trucks exist to deliver my food from the train depot (ideally) to my grocery store. But what’s the argument for Suburbans? SUVs not only drastically increase the risk for pedestrians, but they also make the roads more dangerous for other drivers to. For what? Status? A false perception of safety?

Do you realize how slow 5 mph is? There's no way it could kill anyone, even if they're completely not paying attention.