Color the brake lights red as the column of cars backs up from the Caldecott Tunnel, the often bottled-up gateway between Contra Costa and Alameda counties. Color drivers' moods red as the congestion worsens over a span of 45 years. Many drivers are looking forward to relief from a long-planned $420 million fourth bore of the Caldecott Tunnel, but a lawsuit by Alameda County neighborhood groups and a bicycling advocacy organization could delay the project scheduled to begin in the summer and finish in 2014. A ruling on the lawsuit is expected soon from Alameda County Superior Court judge Frank...