More than 100 sites in Northern Virginia have been approved by the state as inspection stations for the federally mandated auto emission tests which have begun in the area.

Starting this year, vehicles of 1975 model year and newer must pass an annual exhaust test before the state Division of Motor Vehicles will renew the vehicle registration. The requirement applies to vehicles registered in all of Northern Virginia except Loudoun County: the counties of Arlington, Fairfax and Prince William; cities of Alexandria, Fairfax and Falls Church; and towns of Manassas and Manassas Park.

Emission inspection sites approved by the state include: Arlington County

Al's Motors, 3910 Wilson Blvd.

American Service, 585 N. Glebe Rd.

American Service, 601 N. Randolph St.

Anderson Sunoco, 5501 Lee Hwy.

Arlington Sunoco, 201 S. Glebe Rd.

Arna Valley Exxon, 2720 S. Glebe Rd.

Calvert Motors, 2790 S. Arlington Mill Rd.

Cavalier Cars, Inc., 4045 Lee Hwy.

Cherrydale Motors, 3412 Lee Hwy.

Dominion Datsun, 2825 Wilson Blvd.

Glebe Road Exxon, 660 N. Glebe Rd.

Joyce Motors, 3201 N. 10th St.

Lee Hi Way Service Station, 4831 Lee Hwy.

Malcolm's Exxon, 4601 Columbia Pike

Merchant's Tire, 4801 Lee Hwy.

Olmstead Motor Co., 2000 Wilson Blvd.

Shirlington Texacare, 2817 S. Quincy St.

Westover Mobil, 5885 N. Washington Blvd. Alexandria, Falls Church and Fairfax County

Aero Chevrolet, 5800 Edsall Rd., Alexandria

Alexandria Rental Equipment Repair Shop, 610 N. Henry St., Alexandria

Alexandria Toyota, 1707 Mt. Vernon Hwy., Alexandria

Al Karl Co., 6250 Brandon Ave., Springfield

Annandale Exxon, 7029 Columbia Pike, Annandale

Belle Haven Sunoco, 5928 Richmond Hwy., Alexandria

Belle Haven Texaco, 5905 Richmond Hwy., Alexandria

B.F. Goodrich, 141 W. Maple Ave., Vienna

Bill Page Pontiac, 6715 Arlington Blvd., Falls Church

BMS Enterprises, Inc., 5700 Telegraph Rd., Alexandria

Boulevard Mobil Service Center, 7233 Arlington Blvd., Falls Church

Broad Street Amoco, 1105 W. Broad St., Falls Church

Burke Auto Service Center, 9413 Burke Rd., Burke

Burke Center Exxon, 5701 Burke Center Pkwy., Burke

Capital Services, 8011 Braddock Rd., Springfield

Cardinal Plaza Shell, 8334 Old Keene Mill Rd., Springfield

Carl's Exxon, 7312 Richmond Hwy., Alexandria

Carters American Service, 1423 Chain Bridge Rd., McLean

Chantilly Sunoco, 13740 Lee Jackson Hwy., Chantilly

Cotton Automotive, 6263 Old Dominion Dr., McLean

Dave Pyles Lincoln/Mercury, 6500 Little River Tpk., Annandale

Dick Herriman Ford, 8201 Leesburg Pike, Vienna

Dolly Madison Exxon, 6860 Old Dominion Dr., McLean

Dunn Loring Mobil Service Station, 2212 Gallows Rd., Dunn Loring

Edmonds Exxon, 7336 Little River Tpk., Annandale

Edsall Road Mobil Service, 6458 Edsall Rd., Alexandria

Falls Church Chrysler/Plymouth, 6319 Arlington Blvd., Falls Church

Farrish Oldsmobile, 9610 Lee Hwy., Fairfax

Franconia Amoco, 6134 Franconia Rd., Alexandria

Franconia Citgo, 6201 Franconia Rd., Alexandria

Franconia Shell, 6136 Franconia Rd., Alexandria

Gill's Amoco Servicenter, 10701 Leesburg Pike, Herndon

Glynn's Gulf Servicenter, 11198 Main St., Fairfax

H.B. Lantzsch Inc., 11050 Main St., Fairfax

Heritage Exxon, 7623 Little River Tpk., Annandale

Herndon Mobil, 2150 Centreville Rd., Herndon

International Exxon, 8021 Leesburg Pike, Vienna

J.K.J. Chevrolet, 2000 Chain Bridge Rd., Vienna

J. Koons Pontiac, 8525 Leesburg Pike, Vienna

Jerry's Ford, 6510 Little River Tpk., Annandale

Jim McKay Chevrolet, 3509 University Dr., Fairfax

JKJ Chrysler/Plymouth, Inc., 5990 Duke St., Alexandria

Kargo Service Center, 5720 Center St., Bailey's Crossroads

Koons Chrysler/Plymouth, 2050 Chain Bridge Rd., Vienna

Koons Ford, 1051 E. Broad St., Falls Church

Koons Ford, 400 Roosevelt Blvd., Falls Church

Lane's Auto Parts and Service, 6001 Lane Dr., Alexandria

Lindsay Oldsmobile/Cadillac Co., 1525 Kenwood Ave., Alexandria

Main Street Shell, 9956 Main St., Fairfax

Merchant Tire, 9568 Burke Rd., Burke

Merchant Tire, 37 E. Harry F. Byrd Hwy., Sterling

Merchant Tire, 4206 John Marr Dr., Annandale

Old Town Sunoco, 801 N. Washington St., Alexandria

Pallone Chevrolet, 14715 Backlick Rd., Springfield

Pinecrest Exxon, 6566 Little River Tpk., Alexandria

Pineridge Texaco, 5712 Little River Tpk., Fairfax

Roger's Gulf, 8620 Park St., Vienna

Rosslyn Tire, 8320 Lee Hwy., Merrifield

Schmitz Exxon, 8526 Leesburg Pike, Vienna

Seminary Plaza Exxon, 4550 Kenmore Ave., Alexandria

Seven Corners Shell, 6623 Wilson Blvd., Falls Church

Springfield Toyota, 6570 Backlick Rd., Springfield

Sterling Ford, 300 Leesburg Pike, Sterling

Stohlman Datsun, 150 S. Pickett St., Alexandria

Stohlman Oldsmobile, 200 S. Pickett St., Alexandria

Stohlman Volkswagen, 8433 Leesburg Pike, Vienna

Sunderland Shell, 7131 Columbia Pike, Annandale

Temple Motor Co., 1914 Diagonal Rd., Alexandria

Temple Motor Co., 1930 Diagonal Rd., Alexandria

Templeton Oldsmobile, 8598 Leesburg Pike, Vienna

The Car Doctor, 7714 Lee Hwy., Falls Church

Tony's Gulf, 1112 First St., Alexandria

Tysons Corner Amoco, 1955 Chain Bridge Rd., McLean

Vienna Mobil Service, 102 Maple Ave. West, Vienna

Volvo of Alexandria, 1646 King St., Alexandria

Westbriar Servicenter, 396 Maple Ave., Vienna

Wiygul Automotive, 364 S. Pickett St., Alexandria

Youngman's Exxon, 703 N. Washington St., Alexandria Prince William County

Ashdale Citgo, 2850 Dale Blvd., Woodbridge

Battlefield Ford, 8980 Mathis Ave., Manassas

Battlefield Shell, 7110 Sudley Rd., Manassas

Cope Ford, 1100 Cope St., Woodbridge

Dale City Exxon, 14715 Smoketown Rd., Woodbridge

Dale City Mobil, 4194 Dale Blvd., Dale City

Evans Sunoco, 8004 Sudley Rd., Manassas

Frank's Exxon, 8905 Centreville Rd., Manassas

Horner Road Exxon, 13306 Gordon Blvd., Woodbridge

Kennan Inc., 3711 Davis Ford Rd., Woodbridge

Jack Klawans Chevrolet, 15605 Jefferson Davis Hwy., Woodbridge

Lake Ridge Mobil, 1930 Davis Ford Rd., Woodbridge

Lakewood Auto Service, 13302 Occoquan Rd., Woodbridge

Lustine Dodge, 14227 Jefferson Davis Hwy., Woodbridge

Manaport Auto Service, 8375 Sudley Rd., Manassas

Manassas Datsun, 9010 Liberia Ave., Manassas

Manassas Mall Exxon, 8217 Sudley Rd., Manassas

Manassas Shell, 8904 Centreville Rd., Manassas

Marumsco Exxon, 13958 Jefferson Davis Hwy., Woodbridge

Milloy Dodge, 9026 Centreville Rd., Manassas

Nick's Pontiac/Oldsmobile, 14530 Jefferson Davis Hwy., Woodbridge

Riverview Shell Servicenter, 12522 Gordon Blvd., Woodbridge

Scotties Texaco, 9115 Sudley Rd., Manassas

Westgate Exxon, 8005 Sudley Rd., Manassas

Westgate Shell, 8195 Sudley Rd., Manassas

Woodbridge Datsun, 14803 Jefferson Davis Hwy., Woodbridge

Woodbridge Lincoln/Mercury, 14655 Jefferson Davis Hwy., Woodbridge

Wright's Buick, 8914 Reb Yank Dr., Manassas