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Rest Area Usage Design Criteria Update

Description: A data survey was conducted at eight rest area sites in Washington to reevaluate the rest area design guidelines for the number of parking stalls, the water/sewage volume, and the number and ratio of women's to men's restroom stalls. The criteria for the number of parking stalls and water/sewage volume are affected by the increased highway traffic volume and a lower average vehicle occupancy. A fifty/fifty ratio of women's to men's stalls was the standard, but the results of the data analysis show that a sixty/forty ratio is more appropriate. A simulation program, written in Lightspeed Pascal, is available to assist in determining the respective number of stalls based on vehicle arrival rate.

  • Date Published: January, 1989
  • Publication Number: WA-RD 173.1
  • Last Modified: June 12, 2007
  • Authors: William Melton, Anh Tran, Julie Leverson.
  • Originator: Washington State Transportation Center (TRAC)
  • # of Pages: 50 p., 1,322 KB (PDF)
  • Subject: Computer programs, Data collection, Design, Parking, Roadside rest areas, Surveys, Utilization.
  • Keywords: Rest area, restroom design, design criteria, restroom stall ratio, parking guidelines, simulation program, Washington (State)
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This abstract was last modified April 29, 2008