It's less than a month until the 405 freeway closes through Sepulveda Pass for 53 hours. More than 300,000 cars, trucks, buses and motorcycles use the pass on a typical summer weekend, officials say. Here's what one minute of that looks and sounds like, from the Mulholland Drive bridge on Sunday afternoon. For maximum effect, go full screen.
Imagine a whole weekend's worth of that river of vehicles looking for alternate routes over the Santa Monica Mountains and you can understand why people are talking of carmageddon.
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