Gig Drivers Revive Proposition 22 Challenge in California (2)

The California ballot measure bankrolled by Uber Technologies Inc., Lyft Inc., and DoorDash Inc. that allows their drivers to be classified as independent contractors is unconstitutional, according to a lawsuit refiled in state court on Thursday.

The Service Employees International Union, the SEIU California State Council, and four gig drivers renewed their challenge to Proposition 22 in Alameda Superior Court. The California Supreme Court on Feb. 3 declined to directly take up their case before it worked its way through lower courts.

The lawsuit claims that the voter-approved Proposition 22—which allows gig companies to avoid the state’s stringent ...