Don't be a pig -- PennDOT has asked motorists and others to be more mindful about not littering. Last year, it spent near $1 million picking up litter and debris from along state-owned roads in Allegheny County alone.

I-70, Washington County --Ten-mile resurfacing project under way between Kammerer Exit and I-79 South Junction. Contractor scheduled to work from 8 a.m. today through 8 a.m. tomorrow, weather permitting, so anticipate major delays in afternoon, early evening.

I-79, Greene County -- Resurfacing, related work at three separate locations. Varying lane restrictions.

I-376/Parkway East -- Only one inbound lane open from Monroeville to the Edgewood-Swissvale interchange. A number of ramps also closed. Restrictions to be lifted no later than 5 a.m. tomorrow.

I-279/Fort Pitt Bridge -- Single-lane closures in both directions beginning tonight for cleaning. Work begins at 7 p.m. and lasts until 6 a.m. through the end of the month. All ramps open.

I-279, Ross -- Two inbound lanes shifted to the HOV lanes beyond Perrysville Avenue Interchange until mid-September for maintenance, bridge work. Right lane of McKnight Road still closed this week 7 a.m.-5 p.m. for bridge repairs near the I-279 interchange.

Parkway West, Robinson -- Single-lane traffic in both directions in the area of the I-79 interchange (Exit 1A) in Robinson, until 5 a.m. tomorrow. Ramp from northbound I-79 to the outbound/westbound Parkway West will be closed. Expect significant delays; allow extra time, expect possible traffic stoppages and consider alternate routes.

Liberty Tunnels -- Starting tonight, outbound (southbound) tunnel will be closed for maintenance nightly from the P.J. McArdle Roadway to Route 51. Outbound closure from 10 p.m. to 6 a.m. Sunday-Thursday through February. Detours posted.

PennDOT advises motorists to slow down, use caution and expect changing traffic patterns when traveling through the area.

Route 19, Marshall -- Single-lane traffic patterns weeknights for repairs on the Pennsylvania Turnpike overpass just south of Cranberry. Late September finish.

Business Route 22, Monroeville/Wilkins -- Traffic reduced to a single lane each direction, 9:30 p.m.-9 a.m. weekdays through late October, for resurfacing between the Parkway East and Route 48, a total of four miles.

Route 22, Westmoreland County -- Widening project east of New Alexandria continues. Lanes closed in both directions between Hannastown Road, Murrysville, and Route 119, Salem, through mid-October for concrete repairs.

Route 28, Etna area -- Yearlong project to improve outbound Route 28 from Etna to the Highland Park Bridge under way. At the 62nd Street Bridge, Route 8 south ramp to Route 28 north is now closed, but southbound lanes of the bridge have reopened to traffic from Route 8 south.

Route 30, Hempfield -- PennDOT paving 1.2 miles, repairing bridges between Route 136 to east of Route 119 interchange, also passing through parts of Greensburg, South Greensburg and Southwest Greensburg. Fans going to Steelers football camp at Saint Vincent advised to take note.

Route 40, Ohiopyle Road -- Minor delays, restrictions at Chalk Hill east of Uniontown. PennDOT upgrading intersection of the secondary road to Ohiopyle, installing traffic signals.

Route 48, White Oak -- Single, alternating lane of traffic between McKee Road and Payne Street; work associated with replacement of Jacks Run Bridge that started in March and will be completed in October.

Big Sewickley Creek Road, Bell Acres area -- Single alternating lane, 7 a.m.-7 p.m. weekdays through late September, while paving four miles in parts of Bell Acres, Leetsdale and Economy.

Boulevard of the Allies, Oakland -- Closed outbound east of the Parkway East entrance for interchange reconstruction. A second lane on Forbes Avenue reopened this weekend. Also, the boulevard inbound ramp to I-579 north closed this month for bridge deck repairs. Ramp leading to Liberty Bridge remains open.

Penn Avenue, East Liberty -- Traffic shifted from the eastbound lanes to the newly reconstructed inbound lanes, latest phase of the $3.1 million project covering 1.2 miles of Fifth Avenue/Route 8 and Penn Avenue. Fifth Avenue reduced to single alternating lane, 7 p.m.-6 a.m. weekdays through late September in Point Breeze area for paving, other improvements.

Stanwix Street, Downtown -- Closed between Fort Duquesne Boulevard and Penn Avenue for light-rail tunneling work. The tunnel-boring machine could be activated as early as tomorrow to begin digging toward North Shore for second tunnel.

Birmingham Bridge -- One lane maintained in both directions on the southbound side while PennDOT replaces rocker bearings on the northbound side.

Rankin Bridge -- Concrete barriers have established one lane of traffic in each direction while the bridge undergoes a two-year rehabilitation.

Port Authority: 412-442-2000 or www.portauthority.org.

PennDOT: 1-800-FIX-ROAD or www.dot.state.pa.us/district11 for Allegheny, Beaver, Lawrence counties.

Pennsylvania Turnpike: www.paturnpike.com.

City parking: www.pittsburghparking.com.

Biking: www.bike-pgh.org or www.pedalpittsburgh.org.

Airport: www.flypittsburgh.com.

Ride-sharing: www.commuteinfo.com.

Visiting? www.post-gazetteNOW.com.

PennDOT's local hot line: 412-429-6035.

Joe Grata can be reached at jgrata@post-gazette.com.