The Phoenix Road bridge in northern Baltimore County will close to vehicle traffic  for an unspecified period for emergency repair work, according to the Baltimore City Department of Transportation.

The bridge, which crosses Gunpowder Falls and the NCR Trail east of York Road, will close between York and Carroll roads at 6 a.m. Friday until  new  traffic  control devices have been installed as part of a realignment of the traffic pattern. Detours will be in effect.

While the bridge is located in the county, it is owned by the city, which owns the reservoirs in the  vicinity and operates the regional water system. The city said it will maintain access for local  residents.