Development of Alabama traffic factors for use in mechanistic-empirical pavement design.

Details

• Creators:
  Turochy, Rod E. ; Timm, David H. ; Mai, Derong
• Corporate Creators:
  Auburn University. Highway Research Center
• Corporate Contributors:
  United States. Federal Highway Administration ; Alabama. Dept. of Transportation
• Subject/TRT Terms:
  Data Collection Flexible Pavements Mechanistic-empirical Pavement Design Rigid Pavements Thickness Traffic Data Weigh In Motion
• Publication/ Report Number:
  FHWA/ALDOT 930-793
• Resource Type:
  Tech Report
• Geographical Coverage:
  Alabama
• Corporate Publisher:
  Auburn University. Highway Research Center
• Abstract:
  The pavement engineering community is moving toward design practices that use mechanistic-empirical (M-E) approaches to the design and analysis of pavement structures. This effort is
  
  embodied in the Mechanistic-Empirical Pavement Design Guide (MEPDG) that was developed
  
  over the last several years through the National Cooperative Highway Research Program
  
  (NCHRP) and accompanying AASHTOWare Pavement ME Design®
  
  software. As ALDOT moves
  
  toward implementation of M-E pavement design, the need to evaluate the effects of differences
  
  among the many types of traffic data on pavement design became apparent. This research
  
  project examined the differences among national-level traffic inputs developed through the
  
  aforementioned NCHRP studies (and now included as the default traffic data in the Pavement ME
  
  Design®
  
  software), state-level traffic inputs developed from data collected at ALDOT’s weigh-in-motion (WIM) sites, and site-specific data. The full range of traffic inputs considered in the M-E
  
  design process was divided into 13 groups; the effects of the three levels of data were evaluated
  
  separately for each group. A rational, unbiased, quality control procedure for ALDOT WIM data
  
  was developed and applied to the data. Traffic inputs at levels 1 (national), 2 (state or regional),
  
  and 3 (site-specific), as specified in the design software, were then developed. The sensitivity of
  
  the pavement thickness required to not exceed a specified set of allowable pavement distresses,
  
  for both flexible and rigid pavements, to different levels of traffic data in Alabama was then
  
  determined. Finally, axle load spectra recommendations for flexible and rigid pavement design
  
  were made for future use by ALDOT.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:e40c7285c3835421d61043887bc906f77efaae50dbb4fe02c2ae3fdbc5e75eb1
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29484/dot_29484_DS1.pdf
• File Type:
  [PDF - 1.84 MB ]