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Public Works

Phone: 913-715-8300

1800 W Old Highway 56, Olathe, KS 66061

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Paved Roads

Paved Road

General Maintenance Guidelines:

  1. Asphalt roads are divided and maintenance is considered separately for local streets and arterial streets.  This is due to different traffic volumes and types of vehicles.
    1. Arterial streets are generally defined as section line roads
    2. Local streets are generally residential or commercial
  1. Crack Sealing is considered, planned, and budgeted to support asphalt maintenance but is a separate item.
  2. Asphalt Roads are reviewed annually and items such as when the last maintenance treatment was applied, the type of maintenance, the age of the road from original construction, the condition of the road, ADT, and budget are used to determine if and what type of maintenance is needed. 
  3. Asphalt Roads generally will have an independent review and survey to assess their condition every 3 to 5 years.
  1. Arterial Asphalt Street Maintenance
    1. PMI will be kept at 70 or higher.  This would be defined as free from potholes
    2. Asphalt roads are generally expected to last 50 to 75 years depending on traffic.  Reconstruction is planned on these cycles.  Included in the pavement inventory is the best guess original asphalt construction date for each road.
    3. The general maintenance cycle for arterial asphalt roads is as follows:
      • Initial construction
      • 2-3 years crack sealing activities start after initial construction or an overlay and are maintained as needed throughout the life of the road
      • 5 - 7 year chip or nova seal cycle after initial construction
      • 2 inch overlay 10 to 15 years after initial construction
      • After overlay the cycle repeats until reconstruction;
      • Milling is undertaken after enough structural base has been established typically a minimum of 8” or when edge drop-offs become an issue
  1. There are multiple maintenance options available: overlays, chips seal, slurry seal, micro seals, and nova chip.  Generally, the life cycle described above will be implemented.  However, it is not intended to be a set in stone schedule.  The following is a brief discussion as to what each of the maintenance techniques is intended to address. 
    • Overlays will be used when the existing surface has cracking or other defects that cannot be addressed by chip seals or nova chips.  Overlays are also used when the existing structure is less than 8 inches.
    • Chip Seal is used to seal pavement surfaces that do not have excessive cracking or deterioration.  Chip seal is generally not used on roads with less than 8” of structure.  Chip Seal is generally not used on roads with traffic counts greater than 1200 ADT.  
    • Nova Chip is used to seal pavement surfaces that do not have excessive cracking or deterioration.  Nova Chip is generally not used on roads with less than 8” of structure.  Nova chip is used on roads with traffic counts greater than 1200 or with high truck traffic.  Nova chip can be used when there are edge drop off issues that cannot be addressed and are worsened if an overlay is used.
  1. Local Asphalt Street Maintenance
    1. PMI will be kept at 80 or higher.
    2. Four maintenance options are available: overlays, chips seal, and slurry seals. 
      • Overlays will be used when the existing surface has cracking or other defects that cannot be addressed by chip seals or nova chips.  Overlays are also used when the existing structure is less than 8 inches.
      • Chip Seal is used to seal pavement surfaces that do not have excessive cracking or deterioration.  Chip seal is generally not used on roads with less than 8” of structure.  Chip Seal is generally not used on roads with traffic counts greater than 1200 ADT. 
      • Slurry is used to seal pavement surfaces that do not have excessive cracking or deterioration.  Nova Chip is generally not used on roads with less than 8” of structure.  Nova chip is used on roads with traffic counts greater than 1200 or with high truck traffic.  Nova chip can be used when there are edge drop off issues that cannot be addressed and are worsened if an overlay is used.

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