"Pick up your feet!" That was my grandfather's tongue-in-cheek demand everytime we would approach a toll booth somewhere in the Buffalo, NY vicinity. (Go Bills!) Of course he was referring to the buh-bump, buh-bump the tires made on the grooved pavement to pursuade drivers to slow down. The image of my own feet dangling down, causing the car to make that noise often made me laugh. Later in life, when I had my license, whenever I inadvertantly moved toward the shoulder of the road, the highway would rumble and groan warning me to stay in my lane. It turns out that this technology can be used not only for the purpose of safety, but also for art. I was in northern Hungary last week, on my annual retreat , when I encountered something I had never seen before. My first inclination was to (literally) steer clear of it. But later, I drove the same road again and experienced this: I'm not sure what speed I was supposed to drive in order to hear the tune in its id...
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