At lower speeds perhaps. But at highway speeds probably not. Remember: You are the crumple zone in those Kei trucks. As an old and now retired Medic and Firefighter, I'm glad I will never need to cut a dead body out of one those things-- I bet it would be a messy and bloody affair. Because while cutting the first one or two wreaks is sort of fun and exciting, it quickly becomes depressing after that and leaves mark that ain't ever growing back. And I carry enough marks to take to the grave with me.

The acceleration is also poor due to the small low and powered engines. I would not want to try and merge onto a freeway in a metropolitan area in one. And you can bet long money that some suburban weekend warrior Bob Villa wanna be is going to try to do exactly that with the back end loaded with 10 sheets of plywood, 2 dozen 2x4's, a roll of outdoor carpeting and 8 bags of concrete. And then be super surprised when he becomes a hood ornament for a semi truck rolling along at 60mph or some SUV.

That said, I do think thing such small delivery vehicles have a place in the urban environment. Hell, even a Tuk Tuk, a cheap and popular 3rd world motorcycle taxi/cargo hauler hybrid would be even better yet. They would be excellent for operating on side streets and residential neighborhoods making small deliveries. Just keep them off of high speed roadways. And I'm not sure that's a solvable problem. Humans being what they are.