ST3 Voter Survey Results

June 02, 2017

By Erik Iverson, President Moore Information

A recent Moore Information survey of likely voters residing in the Sound Transit District (May 23-25, 2017) explored voter sentiment about the Sound Transit Three (ST3) funding measure, which passed in November 2016. When voters were asked how they would vote, given the chance to vote again, voters say they would oppose the measure increasing car tabs, sales tax and property taxes, by a 51-37% margin, with 13% unsure. Further, the opposition is intense with fully 44% of voters strongly opposing ST3 today.

“As you may know, Puget Sound area voters passed Sound Transit Three, or ST3 last November, which increased car tabs, sales tax and property taxes for transit and light rail. Based on what you know today, if you had the chance to vote on this measure again, would you vote “yes” to approve or “no” to oppose the ST3 funding measure?”

Looking at key demographics, among those most likely to oppose the ST3 measure today appear to be those most vulnerable to tax increases; seniors and low-income voters. Here is a quick overview of how voters in the transit district feel about ST3 today.

  • The “Yes” vote is primarily being driven by Seattle area voters (51% “Yes”/38% “No”), while the majority elsewhere in the District oppose ST3 today.
  • Older voters are most likely to say they would vote “No” with 69% of those aged 55-64 saying “No” and 61% of seniors aged 65+ saying they’d vote “No” today.
  • Men and women both oppose ST3 today, but opposition is wider among men.
  • By party, 70% of Republicans and 58% of Independents would vote “No” today, with just 31% of Democrats saying they would vote “No.”
  • Lower income voters are opposed, with 57% of those making under $50k/year saying they would vote “No” today.


A total of 500 telephone interviews were conducted statewide in Washington May 23-25, 2017 among a representative sample of likely voters, including a total of N=257 among voters residing in the Sound Transit District. Interviews were conducted using live interviewers and included landline and cell phones. The sampling error is plus or minus 7% at the 95% confidence level for a sample of 257.

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