12:05 p.m. update: U.S. 183 now open in all directions, the Central Texas Regional Mobility Authority said.

Martin Luther King Boulevard is also opened where it crossed with U.S. 183, officials said.

11:40 a.m. update: Southbound traffic is backed up to U.S. 290, Total Traffic and Weather Network reported.

11:19 a.m. update: The transportation agency in charge of the road work on U.S. 183, the Central Texas Regional Mobility Authority, tweeted that the northbound lanes of the highway have reopened to traffic.

10:50 a.m. update: The northbound and southbound lanes of U.S. 183 near the interchange with MLK Jr. Boulevard in East Austin are expected to be closed until 1 p.m., the Texas Department of Transportation said.

Earlier: Transportation officials shut down Ed Bluestein Boulevard in both directions Friday morning at Martin Luther King Boulevard, backing up traffic for more than a mile, after a contractor warned about stability issues on an old overpass.

The emergency shutdown began shortly before 10 a.m. and could last for as long as two hours, Austin police said.

Officials cited in a tweet “concerns about stability of railing on old MLK bridge over 183.” The contractor working on the bridge “wants to ensure it is safe before letting traffic back underneath,” the tweet from the Central Texas Regional Mobility Authority said.

Austin police are rerouting traffic through the northbound and southbound frontage roads.

?This is a developing story, check back for details.



Traffic Haz @ MLK bridge, N/S lanes Ed Bluestein closed - take alternate routes & avoid area, diverting traffic to N/S frontage #ATXtraffic

— Austin Police Dept (@Austin_Police) July 14, 2017 ]]