Denver has installed 10 sets of flashing school zone warning lights in time for the opening of school on Wednesday, with another 21 sets scheduled to be completed by the end of this year.

Denver is installing flashing yellow lights to on school zones to warn drivers of reduced speed limits.

Generally, traffic fines are doubled in school zones.

The flashing beacons are being installed by Denver Public Works Department’s Traffic Engineering Services Division. Bill Vidal, manager of public works, will inaugurate the set outside Steele Elementary School, 320 S. Marion St. Parkway, on Tuesday at 2 p.m.

The other completed installations are:

• Columbian/St. Catherine’s, Federal Blvd/W. 41st Ave
• Cheltenham, W. Colfax Ave/Irving St.
• Colfax, W. Colfax Ave/Tennyson St.
• Southmoor, S. Monaco Pkwy/S. Magnolia Way
• Phillips, Monaco Pkwy/Montview Blvd.
• Valverde, W. Alameda Ave/S. Tejon St.
• Goldrick, W. Mississippi Ave/S. Zuni St.
• Asbury , Evans Ave/Lafayette St.
• Ebert-Polaris, Park Ave West/Tremont St.

The other 21 planned locations are:

• Johnson, W. Jewell Ave/S. Irving St.
• Force , W. Florida Ave/S. Wolff St.
• Dennison, W. Jewell Ave/S. Yates St.
• Gust, W. Yale Ave/S. Irving St.
• Barnum, W. 1st Ave/Irving St.
• Ashley, Montview Blvd/Syracuse St.
• Hillel Academy, Holly St./Dakota Ave.
• Christ the King, 8th Ave/Glencoe St.
• Paddington/St. James, 13th Ave/Quebec St. -Oneida St.
• McMeen, S. Holly St/Tennessee Ave.
• McKinley/Thatcher, S. Logan St/Louisiana Ave.
• Montessori/Cole, MLK Jr. Blvd/Franklin St.
• Whittier, Downing St/24th Ave.
• Blessed Sacrament, Montview Blvd/Elm St.
• Gilpin, Stout St/31st St.
• Valdez, W. 29th Ave/Bryant St.
• Swansea, 46th Ave/Columbine St.
• Greenlee, Kalamath St./W.11th Ave.
• Moore, 8th Ave/Downing St.
• Good Shepherd, 6th Ave/Elizabeth St.
• Bromwell, Josephine St/4th Ave.
• Greenwood, Gateway Blvd/Dearborn St.