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Pavement Management System
The Public Works Department's Pavement Maintenance Program is operated through the Engineering Division which uses a software program to store asset inventories and condition assessment. The program calculates pavement index to aid in preventative maintenance. The goal is to do preventative maintenance to prolong pavement life.
The typical life of a Leawood Residential Roadway:
|Year 2 - Year 8||Crack Seal|
|Year 9||Slurry Seal|
|Year 10||Crack Seal|
|Year 15||Slurry seal (base repairs as needed)|
|Year 16 - Year 20||Crack Seal|
|Year 21||Mill and Overlay (base repairs as needed)|
For Arterial Streets the Pavement Maintenance Program is to mill and overlay these streets every 10-years. If there is funding limitations these streets would receive a micro-surface in the interim.
For Collector Streets the Pavement Maintenance Program is to mill and overlay these streets every 15-years. If there is funding limitations these streets would receive a micro-surface in the interim.
By adopting this maintenance program, the City hopes to prevent the necessity of the more costly and disruptive process of reconstructing a street. Many of the streets, mostly north of I-435, have already deteriorated to the point where a complete reconstruction is necessary. The City has developed a balanced plan of preventative maintenance on newer streets with the reconstruction of older streets within the budget constraints.
How do they determine when a street needs maintenance?
Every two years the Engineering/Design Division rates all of the streets. The streets are rated on several factors which are combined to give an overall rating. This overall rating is used to determine when a street is scheduled for maintenance and what type of maintenance it will receive.
Factors used in rating the City streets
Several factors are taken into consideration when rating the pavement condition:
patching estimate: The estimate amount of patching the pavement needs.
- When excessive asphalt cement rises to the surface creating a shiny, glass-like,
reflecting surface that usually becomes quite sticky.
- Raveling – The wearing away of the pavement surface caused by the loss of asphalt
or tar binder and dislodged aggregate particles.
- When the surface of the roadway becomes smooth to the touch, creating low
- Scaling – The breakdown of a slab surface to a depth of ¼ to ½ in.
- Popouts – A small piece of pavement that freeze-thaw action combined with aggregate
expansion causes to break loose from the surface (these are much smaller than
holes - Bowl-shaped depressions in the pavement surface.
- Permanent, longitudinal displacement of a localized area of the pavement
- Faulting – A difference in elevation across a joint.
- When there are pronounced impressions in the pavement along the wheel paths.
- Cracking – Cracking can take on several forms, such as fatigue cracking, longitudinal
cracking, block cracking, corner cracking, D cracking, and transverse cracking.
riding comfort of the street.
- Drainage problems - such as ponding.
Items that do not affect the pavement rating, but may be taken into consideration are:
Curb and Gutter condition and replacement estimate: The overall condition of the curbs, along with the estimated amount of curbing that needs to be replaced.
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