Broadway-Jackson project

Members of Alameda’s Planning Board are raising concerns about a proposed $189 million plan intended to reduce traffic congestion around the Webster and Posey tubes.

At their meeting Monday, board members said they want more information to be gathered about the potential benefits of the plan, which would get its first $75 million in funding if voters approve an extension and increase of the Measure B sales tax for county transportation in November - and they want specifics about what that money would pay for.