The 50-year-old driver from the Bronx told police he felt the steering wheel shimmy as he passed the Bergen Boulevard split around 2:30 a.m.
As he reached the curved ramp, the driver said, he lost control and the rig tipped.
Heavy duty crews cleaned up the mess in time for the morning rush. But Route 1 southbound was closed for several hours and two of the northbound lanes for more than two, Police Capt. Stanley Zon said.
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