ANALYTICAL MODELS FOR GUIDEWAY SURFACE IRREGULARITIES AND TERRAIN SMOOTHING

The report relates to the analytical modeling of guideway irregularities. A design criteria for determining the degree of leveling and filling of the natural terrain in order to achieve a particular PSD specification is formulated and presented. An analytical model for the PSD of short wavelength surface roughness type irregularities is derived and interpreted in terms of familiar roughness measurement techniques. The procedure for relating a PSD design specification to an equivalent California profile index is presented in addition to the procedure for interpreting measuremetns of guideway profile deviations from a straight edge. Examples are presented demonstrating typical applications of the resutls. Numerical simulations incorporating random numbers for formulating typical guideway profiles are used to verify the analytical model. Excellent agreement between the analytical and numerical results are demonstrated.

• Supplemental Notes:
  • Sponsored by DOT, Urban Mass Transportation Administration.
• Corporate Authors:

  University of Texas, Arlington

  Public Transportation Center, Room 206E
  Arlington, TX  United States  76010
• Authors:
  • Hullender, D A
  • Bartley, T M
  • KRISHNA, M B
• Publication Date: 1976-1

Media Info

• Pagination: 68 p.

Subject/Index Terms

• TRT Terms: Analysis; Design; Earthwork; Guideways; Leveling; Mathematical models; Numerical analysis; Texture
• Uncontrolled Terms: Design criteria; Models
• Old TRIS Terms: Analytical method
• Subject Areas: Design; Highways; Operations and Traffic Management; Safety and Human Factors; Terminals and Facilities;

Filing Info

• Accession Number: 00158146
• Record Type: Publication
• Source Agency: Urban Mass Transportation Administration
• Report/Paper Numbers: UMTA-TX-11-0001-76-1
• Contract Numbers: TX-11-0001
• Files: TRIS, USDOT
• Created Date: Sep 28 1977 12:00AM