Through the end of this year, 0.15% of the sales tax you pay funds the voter-approved Seattle Transit Measure. That would double to 0.30% if the City Council and Seattle voters approve the renewal/expansion that Mayor Katie Wilson officially introduced this afternoon. She said it’ll make living in Seattle more affordable by enabling more people to “live car-free or car-light.” She acknowledged that raising the sales tax isn’t ideal but noted that it’s one of the few revenue-raising tools available under state law. Besides paying for more transit – 280,000 additional Metro bus trips a year, 100,000 more than the current measure funds – it also would pay for 22,000 free ORCA transit passes, more than double what the city provides now, said acting SDOT director Angela Brady during the announcement event at City Hall. The passes are now available to Seattle Promise scholars, low-income Seattle Preschool Program families, and Seattle Housing Authority residents. The measure’s renewal/expansion would also make those passes available to Housing Choice Voucher participants.

The mayor’s announcement says the Transit Measure isn’t just about buses: It also would “support the design and delivery of Sound Transit’s West Seattle Link Extension, Ballard Link Extension, and Graham Street Station.” The 0.30% sales tax would generate an estimated $138 million average per year for the 10 years of this measure, which is proposed to go to voters in November. Council review starts this Thursday and will be led by District 1 City Councilmember Rob Saka, who chairs the council committee that oversees transportation. We’ll add the specific text of the proposal when we get it; the slide deck for Thursday’s council meeting is now available, and we’ll add some highlights from that soon.