To turn L.A. into an aspirational dreamland, the ‘La La Land’ crew shut down a busy freeway – twice

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“La La Land,” a musical about two beautiful young people falling for each other in Los Angeles, was always meant to be a love letter to the city.

“It’s not ‘Training Day,’” joked David Wasco, the film’s production designer, who’s worked on grittier L.A. films “Collateral” and “Pulp Fiction.” “There’s...