Methodologies for estimating advisory curve speeds on Oregon highways.

Details

• Creators:
  Dixon, Karen ; Rohani, Joshan W.
• Corporate Creators:
  Oregon State University. School of Civil and Construction Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Speed zones
  • Traffic signs
  • Traffic signals
  • Evaluation
  • Speed zoning (Traffic engineering)--Oregon
  • Traffic signs and signals--Oregon--Evaluation
• Publication/ Report Number:
  FHWA-OR-RD-08-04
• Resource Type:
  Tech Report
• Geographical Coverage:
  Oregon
• Edition:
  Final report.
• Corporate Publisher:
  Oregon. Dept. of Transportation. Research Unit
• Abstract:
  This report reviews an Oregon research effort to evaluate the identification and marking of advisory speeds on Oregon ; highways. In particular, this research effort focused on the implications of modified advisory speed thresholds and ; identification procedures following the most recent and the upcoming MUTCD and the Traffic Control Devices (TCD) ; Handbook recommendations. The primary objectives of this research effort were to help identify the basis for the current ; and proposed advisory speed posting procedures (with specific attention to the horizontal curve location on rural roads and ; passenger vehicle condition), to evaluate Oregon placement strategies at a variety of locations, and to identify potential ; criteria for establishing advisory speeds for these curved sections on Oregon highways. Included with this evaluation is an ; assessment of associated costs for implementation of a modified advisory speed policy in Oregon. Through the use of ; both manual and digital ball-bank devices, the report identifies compliance of current and future advisory speed thresholds ; for both State- and county-maintained roads, expected costs for upgrading State-maintained facilities, evaluation of ; alternative computational methods, and an assessment of the differences observed between the two different ball-bank ; devices.
  More +
• Format:
  PDF
• Funding:
  SPR 641
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/21838/dot_21838_DS1.pdf
• File Type:
  [PDF - 5.39 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:c51f7e4f093f054e6702abaa26c12b515eedce3b79a9e6f48953860a6d207b59e7c4f17b5429663f5f830eaadc943244cb0a554f2896ae83e48b288013a0fa24