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| Pavement rehabilitation is required
to extend the useful life of the existing pavement structure.
For flexible pavements,
WSDOT will continue to use advanced procedures (mostly
nondestructive testing and analysis) for characterizing the
existing pavement structure and for determining the amount and
type of pavement strengthening that is required. For
flexible pavements, the preservation policy is to protect the
underlying pavement layers and rehabilitate only the surface
course layer.
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Placing AC Overlay
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| For rigid pavements,
WSDOT is primarily rehabilitating mostly 30-year-old concrete
pavements by increasing the strength of the pavement joints via
retrofitting with steel dowel bars. |
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Dowel Bar Retrofit |
This will extend the
life of these pavements by ten or more years. WSDOT will
continue to explore options for rehabilitating concrete
pavements. The most recent plan for concrete pavement
rehabilitation was completed in 1990. That plan must be
updated to incorporate the dowel bar retrofit technology and to
address issues for high volume urban areas. |
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