Traffic Lab asked a few weeks ago for your questions about transportation in the Puget Sound region, and we received dozens on a broad range of topics.

We narrowed down the list to four questions that asked about road design, road maintenance, buses and light rail.

Now, we need your help picking which question to investigate. You can vote on one of the four options until May 7. If you have an advertisement blocker on, you will need to disable it to vote.

Traffic Lab is a Seattle Times project that digs into the region’s thorny transportation issues, spotlights promising approaches to easing gridlock, and helps readers find the best ways to get around. It is funded with the help of community sponsors Alaska Airlines, CenturyLink, Kemper Development Co., NHL Seattle, PEMCO Mutual Insurance Company and Seattle Children’s hospital. Seattle Times editors and reporters operate independently of our funders and maintain editorial control over Traffic Lab content.

If you’re using The Seattle Times mobile app, click here to vote directly. If you want to submit your own questions, click here.