David Yoon is a “writer, designer, photographer, and self-confessed urban planning geek” whose blog “Narrow Streets: Los Angeles” plays with an intriguing idea: What if Los Angeles’ wide streets could be narrowed? What would it do to the identity of the city, and to the place of people in it? “Narrow Streets’ is a notional cousin to the idea of LA without cars, first visualized by photographer Matt Logue and later borrowed by filmmaker Ross Ching, but where those projects attempted to render LA quieter and emptier, Yoon’s is after something more elusive: A city rescaled. If you’re an urban planning geek, or even just a resident of the actual, wide-gauge LA, it’s a stimulating way to think about the place, and it raises a nutty, bracing possibility — liberation by smooshing.