New post on http://twitter.com/caltransdist3 : TrafficAlert Hwy 20 Nevada City at Uren Street to I-80 at Yuba Gap remains closed overnight for crash cleanup & CHP investigation. Only Hwy 20 residents with ID and proof of address are being allowed past closures. Plan for alternate routes in the a.m. - there is no ETO. http://pic.twitter.com/Au0iwWZqpM