Bicyclist and pedestrian usage of adjoining public pathways also reached a new high of 763,315 last year.
The sales tax, which generates $50 million annually and represents roughly 60% of SMART's total operating revenues, expires in four years.
A citizens group would need to gather signatures from 10% of registered voters in Sonoma and Marin counties to qualify a measure for the ballot.
A customized collection of grant news from foundations and the federal government from around the Web.
In partnership with the Unreasonable Group, the Nike Foundation is set to launch the Girl Effect Accelerator this November to help social entrepreneurs whose business startups focus on helping economically disadvantaged adolescent girls.