The 25th annual Woodward Dream Cruise jammed up 10 miles from Ferndale to Pontiac, Michigan, last weekend. My face still hurts from smiling so much. The third Saturday in August has been a national holiday in Motown since 1995. It began as an effort by Nelson House and a handful of volunteers to raise money for a children’s soccer field in Ferndale, just north of Detroit. They hoped to recreate the nostalgia of the 1950s and ’60s, when youth, music and Motor City steel roamed Woodward Avenue, America’s first highway. That year, 250,000 people participated, nearly 10 times the number expected. The rest, as they say, is history. Today, the…