The old ways of traffic engineering - build it bigger, wider, faster - aren't going to disappear overnight. But one look at West Palm Beach suggests an evolution is under way. When the city of 82,000 went ahead with its plan to convert several wide thoroughfares into narrow two-way streets, traffic slowed so much that people felt it was safe to walk there.The increase in pedestrian traffic attracted new shops and apartment buildings. Property values along Clematis Street, one of the town's main drags, have more than doubled since it was reconfigured.Fascinating. Roundabouts with no signs or lights turn out to be safer than intersections with high-tech regulation. It's about the eye-contact between individuals negotiating the intersection instead -- I can certainly say that that's the only thing that keeps pedestrians in Philly alive!