Video: One minute on the 405

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.

Metro has made available any info you could want on the shutdown — and there's another community meeting Thursday night at the Skirball.

They're also offering website widgets, like this one: