SAN FRANCISCO — A law requiring San Francisco businesses to provide employees with one of three transit incentive options that will save employers up to 9 percent in payroll taxes has been proposed. For the full story, click here.

Smart card hackers silenced

LAS VEGAS — After Boston transit officials filed a suit against three M.I.T. students, a U.S. district court judge has barred them from presenting information at a conference for security researchers on how to hack into smart cards for free rides. For the full story, click here.

Light rail line protested

LOS ANGELES — School district officials and a coalition of neighborhood groups have voiced safety concerns over a $863 million, 8.5-mile light rail line that would have at-grade crossings near two South Los Angeles schools. For the full story, click here.