INTERSTATES

Parkway East/I-376: Next phase of rehabilitation starts over the March 29-30 weekend between Edgewood/Swissvale and Churchill interchanges, when one inbound lane will be closed for slab repairs.

I-79, Allegheny County: Preliminary work to begin in two weeks for reconstruction between the Ohio River and I-279 junction in Franklin Park. Traffic will be maintained on northbound lanes while contractor works on the southbound side.

STATE HIGHWAYS

Route 28: Northbound single-lane closures start tomorrow from south of Harmar interchange to Creighton interchange for $35 million improvement that began last year. Southbound closures 9 a.m. to 5:30 p.m. daily through April from Pittsburgh Mills to Route 910/Harmar. Traffic will be stopped for up to 15 mintues about 10:55 a.m. tomorrow in Harmar, where a contractor will conduct a "test blast" as part of the hillside stabilization project in the area south of Route 910.

Also, single-lane closure from 9 a.m. to 3 p.m. tomorrow southbound from Etna on-ramp to Millvale while workers build foundation for a highway advisory sign.

Route 910, Gibsonia: Route 910 overpass of the Pennsylvania Turnpike, three miles west of Butler Valley interchange, closed until fall for construction of $7.5 million bridge, requiring a 7.3-mile detour.

OTHER ROADS

Stanwix Street, Downtown: Closed between Fort Duquesne Boulevard and Penn Avenue for excavation associated with extending the light-rail system to the North Shore.

Baptist Road, Bethel Park: Closed from Millenium Park Drive and Lowe's entrance for $2 million replacement of the bridge over railroad tracks between Horning and Hamilton roads. Work to last through August.

Boulevard of the Allies, Oakland: Closed outbound, east of the Parkway East entrance. Forbes Avenue down to two lanes, both for construction of new bridges and a "gateway interchange." Short stretch of Fifth Avenue to be closed 9 a.m. to 3 p.m. daily, beginning at Robinson Street, through April.

Brownsville Road, South Park: Bridge over Piney Fork closed for $1.3 million replacement. Detour via Route 88.

MAJOR BRIDGES

Birmingham Bridge: One lane maintained in both directions, on the southbound side. Northbound side remains closed while rocker bearings are replaced.

For Duquesne Bridge: Ramps to and from Route 65 at the north end of the bridge to be closed 10 p.m. Friday through Sunday for pier work related to the Port Authority's light-rail extension.