GOLDEN RULE number one in the Sunshine State: Older is often better. Take, for example, the Old Seven Mile Bridge in the Florida Keys. Built in 1912 as a railroad causeway, it’s now a fishing (and cycling) pier spanning the turquoise water of the Moser Channel. Running parallel is the new Seven Mile Bridge, completed in 1982 and part of the Overseas Highway that leads to the terminus of Florida’s island chain, rollicking Key West. Having grown up in Florida, I’ve been stuck in traffic on that new bridge too many times to count, wedged into a phalanx of cars with out-of-state license plates bound for the island of Hemingway tchotchkes and frozen-daiquiri dispensers.