Traffic Lab is a Seattle Times project that digs into the region’s transportation issues to explore the policies and politics that determine how we get around and how billions of dollars in public money are spent.

After a small stretch of a never-used bus lane was saved on Capitol Hill, Seattle City Councilmember Alexis Mercedes Rinck said this week she’d push to expand transit-only lanes on three of the city’s busiest streets.

With the “Better Bus Lanes” campaign, Rinck said she and a coalition of transportation advocates are agitating for more reliable bus service on Aurora Avenue North, Rainier Avenue South and Denny Way, streets that support the popular yet consistently late King County Metro bus lines 7 and 8, and the RapidRide E Line.

Standing on the saved bus lane this week — at

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