Develop Crash Predictive Methods for Frontage Roads Including Ramp Terminals, and Intersections with Crossroads in Texas

Currently, no frontage specific intersection or ramp terminal predictive methods are available, and transportation engineers typically apply methods developed for non-frontage road intersections to evaluate their safety. Additionally, no guidelines exist to select the appropriate distance between adjacent ramps and/or intersections, ramp type and their orders, and distance between ramps and driveways. The first objective of this project is to develop Safety Performance Functions (SPFs) and Crash Modification factors (CMFs) for ramp terminals and intersections of frontage roads with crossroads. The second objective of this project is to evaluate the safety impact of weaving on the frontage road versus weaving on the freeway. The research team will collect site characteristics data and develop crash predictive methods for different types of frontage road segments and intersections on frontage roads, including ramp terminals. The research team will develop these models by area type (i.e., large urban, small urban, suburban/fringe, and rural), Texas Department of Transportation's (TxDOT) regions, and facility type (one-way and two-way). These models will supplement the generic SPFs developed in TxDOT's 0-7083 project. The research team will incorporate the crash predictive methods into spreadsheet tools to facilitate the analysis and to support project design decisions of frontage roads. The researchers will also develop a framework for selecting an appropriate configuration for frontage road segments and intersections, and as well guidance for the minimum distance from ramp terminal to crossroad intersection and a need for lane additions.

• Record URL:
  • https://library.ctr.utexas.edu/Presto/project=0-7222
• Supplemental Notes:
  • Related to TxDOT Research Project 0-7083.

Language

• English

Project

• Status: Active
• Funding: $392825
• Contract Numbers:

  0-7222

• Sponsor Organizations:

  Texas Department of Transportation

  125 E. 11th Street
  Austin, TX  United States  78701-2483
• Project Managers:

  Adediwura, Jade

• Performing Organizations:

  Texas A&M Transportation Institute

  Texas A&M University System
  3135 TAMU
  College Station, TX  United States  77843-3135

  Texas State University, San Marcos

  JCK Building, Suite 489
  San Marcos, TX  United States 
• Principal Investigators:

  Geedipally, Srinivas

• Start Date: 20240901
• Expected Completion Date: 20260831
• Actual Completion Date: 0

Subject/Index Terms

• TRT Terms: Crash modification factors; Crashes; Frontage roads; Geometric design; Highway design; Interchange ramps; Intersections; Predictive models; Weaving traffic
• Identifier Terms: Safety Performance Functions
• Geographic Terms: Texas
• Subject Areas: Design; Highways; Operations and Traffic Management; Safety and Human Factors;

Filing Info

• Accession Number: 01932650
• Record Type: Research project
• Source Agency: Texas Department of Transportation
• Contract Numbers: 0-7222
• Files: RIP, STATEDOT
• Created Date: Oct 3 2024 10:27AM