Road Maintenance Solutions from One Source

Do I Need to Do Anything?

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WHAT THIS GUIDE DOES:

• This guide allows you to examine your own pavement and assess what you might need to do - IF ANYTHING!
• Just add up the points and use the key to decide
• Then contact VSS on 1-916-373-1500 for action!
• This does not include causes: see our technical library for full distress analysis.
• If any type of failure is all over the lot then call VSS for a full assessment!

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MAIN FAILURE TYPES:

• Cracking
• Deformation
• Disintegration

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CRACKING:

• Cracking lets water into the pavement
• It will make the pavement softer and cracking will get worse and lead to potholes and failure
• In parking lots you need to consider:
  • BLOCK or AGE CRACKING
  • ALLIGATOR CRACKING
  • LONGITUDINAL AND TRANSVERSE CRACKING
  • THERMAL CRACKING

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THERMAL AND BLOCK CRACKING (AGE):

• A square pattern no more than 6 X6 ft
• NOT In Load area
• Dry and old aged appearance.
  
  Less than 3/8 inch wide: LOW Severity - Score 20
  > 3/8 inch but < ½ inch: MEDIUM Severity - Score 40
  ½ inch: HIGH Severity - Score 60

Block Medium

Block High

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ALLIGATOR CRACKING:

• In Load area
• Looks like an alligator skin
  
  Small cracks in wheel paths: Low - Score 40
  Extensive alligator skin: Medium - Score 80
  Broken up plates of Material: High - Score: 120

Low	Medium
High

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LONGITUDINAL AND TRANSVERSE:

• Run along in either direction
• Long cracks
• Often at joints in underlying pavement
  
  Less than 3/8 inch wide: Low - Score 20
  3/8 inches but < ½ inch: Medium - Score 40
  > ½ inch: High - Score 60

Medium Longitudinal	High Transverse
High Transverse and Longitudinal

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DEFORMATION:

• Ruts
• “Bird bath” Depressions
• Shoves
  
  Less than ½ inch deep: Low - Score 40 points
  > ½ inch, < 2 inches deep: Medium - Score 80 points
  Greater than 2 inches deep: High - Score 120 points

Rutting High

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DISINTIGRATION:

• Raveling
• Fuel Spills
• Potholes

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RAVELING:

• Loss of surface materials
• Starts with fines
• May be associated with cracking
  
  Small aggregates on surface: Low - Score 20 points Pitting and small aggregates in gutters: Medium - Score 40 points Deep pitting, larger aggregates on surface. High - Score 60 points

Raveling High

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FUEL SPILLS:

• Soft spots caused by oil dripping
  
  Loose materials and dark soft looking areas - Score 40 points

Fuel Spills

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POTHOLES:

• All potholes are bad because they allow water in and they GROW
• Get them when they are small!
  
  1-2 inches diameter: Low - Score 20 points EACH
  2-4 inches : Medium - Score 40 points EACH
  >4 inches: High - Score 60 points EACH

Pothole Medium

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CALCULATION:

• ADD UP Points
• Divide by 10 = CCI (crude condition index)
• 100- CCI = PCI Pavement Condition Index

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KEY:

• 95-100: Call VSS next year
• 85-94: Call VSS for a free assessment
• 65-84: Fill up the cracks and ANY potholes. Minor skin patching, seal coat.
• 45-64: Fill up cracks, fill potholes, dig out fatigued areas, Slurry Seal
• 25-44: Fill up cracks, consider Asphalt rubber Cape Seal, Dig outs, major patching, Slurry seal. Or Overlay. < 25 : Recycling or Reconstruction or Asphalt Rubber treatment with regulating course and overlay or slurry seal.