One of the lingering memories of my recent trip to Israel is of walls; famous ones, like the Wailing Wall, and miles upon miles of inescapable eyesores that make up the Separation Wall. What I didn't expect was to pay any attention to the mundane walls along the freeways. Instead of the monotonous barriers that traditionally protect houses and people living in close proximity to freeways, Israelis excel in making these boring structures into surprisingly attractive components of the city fabric...