A collision on northbound Interstate 5 at Southcenter caused a 7-mile backup Friday morning, but has since been cleared.

The Washington State Department of Transportation said two lanes were blocked. The collision caused the normal drive time of 35-to-40 minutes between Federal Way and Seattle to be extended to 110 minutes.

Tracy Taylor suggests using Military Road, Pacific Highway South or NB 167 as alternate routes.

For traffic updates on the go, download the Seattle Traffic App.