Seattle traffic congestion has increased 14 percent since last year and was the sixth-most congested in the nation in September, up from eighth in September 2012.
Kirkland-based traffic data company INRIX says this is consistent with the high-tech and bio-tech job market boom on the eastside. Also, a growing real estate market is attracting more congestion as more families move to the Puget Sound region.
The most congested corridors are on Interstate 405 from Renton to Bellevue and from Bellevue to Lynnwood.
On average, INRIX determined it takes 30 minutes to go 13 miles at 4 p.m. on southbound Interstate 5 into Seattle.
The company uses millions of data points to calculate traffic information from GPS in area vehicles to information gathered on the INRIX traffic app.