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Senate Bill 220
(section 5), passed in 2001, requires county officials to
provide TxDOT an
engineering analysis when a
county’s road or bridge load zone limits change. This analysis must be signed by
a professional engineer.
The
following links provide more
information about county road load zone changes and analysis procedures.
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Texas Administrative Code 25.2 Subchapter A General Rule §25.2
– Establishes the information
required in the road load zone analysis.
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County Road Load Zone Procedure
– Counties may use this procedure to analyze a roadway to
determine the allowable load limit. Page 5 includes a link to
the Natural Resource Conservation Service Web site, which provides online maps
for determining soil series.
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Texas Triaxial Classes
– A
spreadsheet listing triaxial classes for approximately 700 Texas soil series. The
soil series information is used in conjunction with the county road load
zone procedure.
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