The planned shutdown of the L subway-train tunnel is already causing flutters of anxiety among Brooklynites and businesses, but a new report says such worries could be eased with more ride-sharing services, dedicated bus lanes and even aerial gondolas high over the East River.

Released this week by New York University’s Rudin Center for Transportation, the report recommends many ways for both the Metropolitan Transportation Authority and businesses to soften the impact on neighborhoods like Williamsburg.

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