A new bill has been introduced, Senate 625, which would require buses, limousines and cabs to provide drivers of these public transportation vehicles to have separate ventilated space to protect them from passengers that smoke cannabis when on tours or other events. Drivers that test positive could lose their licenses, so lawmakers are moving to give them protection. It is illegal for a passenger or a driver to smoke pot on California highways now, but there is a loophole on commercial vehicles. The bill will require that everyone on a commercial vehicle that has pot smoking, all must be over the age of 21.