Its bridges are ornate and decorative. But they're also decaying and crumbling. Traffic moves freely -- most days -- along the 75-mile corridor. But it snarls in the short exit ramps and narrow parking lots. If it were a car, Route 46 would be a relic. Instead, it's one of the state's busiest, most accident-prone highways, and many believe it needs an overhaul.While the state plans to spend more than $200 million to fix sections in Bergen, Passaic and Essex counties, local officials fear much of the highway will remain a frayed string of aging sprawl that's unsafe and ugly....