Reconciling Speed Limits With Design Speeds [Technical Summary]

Details

• Creators:
  Tarko, Andrew
• Corporate Creators:
  Purdue University. Joint Transportation Research Program
• Corporate Contributors:
  Indiana Department of Transportation ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Speed limits
  • Mathematical prediction
  • Statistical dispersion
  • Data analysis
  • Vulnerable road users
  • Safety
  • Highway design
  • Costs
  • Road construction
  • Intersections
  More +
• Publication/ Report Number:
  FHWA/IN/JTRP-2004/26
• Resource Type:
  Brief
• Geographical Coverage:
  United States ; Indiana
• Edition:
  Technical Summary
• Corporate Publisher:
  Indiana Department of Transportation
• Abstract:
  Some Indiana road sections designed and built in the past do not meet the current design standards. INDOT makes a continuous effort to modernize these sections. Due to prohibitive costs, reduced design speeds and design exceptions are considered. Guidance is needed to help reduce the discrepancy between the economically justifiable design solutions and the design standards expected by the motorists. Predicting the 85th percentile speed on modernized sections would help designers in finding solutions that meet both the motorists’ expectations and the current design standards to the possible extent. The objective of the research was the development of a tool for predicting the actual speeds on modernized two- and four-lane roads in Indiana.
• Format:
  PDF
• Funding:
  SPR-2661
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/90710/dot_90710_DS1.pdf
• File Type:
  [PDF - 56.57 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:a8a171a979cd531ff154cf23c6507ee15ca004db9613fef9c1c94e2d0e9f42348053daec4391ef6f2ece262459a4161e6ca4bde5c91c3c8770a50aed0963c346