Investigation of the impact of the I-94 ATM system on the safety of the I-94 commons high crash area : final report.

Details

• Creators:
  Hourdos, John ; Zitzow, Stephen
• Corporate Creators:
  Minnesota Traffic Observatory ; University of Minnesota. Dept. of Civil Engineering
• Corporate Contributors:
  Minnesota. Dept. of Transportation. Research Services & Library
• Subject/TRT Terms:
  Data Analysis Physical Distribution Shock Waves Traffic Safety Variable Speed Limits
• Publication/ Report Number:
  MN/RC 2014-19
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Minnesota
• Edition:
  Final report
• Corporate Publisher:
  Minnesota. Dept. of Transportation. Research Services & Library
• Abstract:
  Active Traffic Management (ATM) strategies are being deployed in major cities worldwide to deal with pervasive system
  
  congestion and safety concerns. While such strategies include a diverse array of components, in the Twin Cities metropolitan
  
  area the deployment of the Intelligent Lane Control Signs (ILCS) allowed for the implementation of Variable Speed Limits
  
  (VSL). The VSL system in the Twin Cities aims to detect congestion and preemptively warn upstream drivers to reduce speed.
  
  By reducing the severe change in speed between upstream and downstream traffic, safety and operational benefits are sought.
  
  This report presents an investigation of the effect the I-94 VSL system has on the safety of the high frequency crash area
  
  located on the westbound lanes of the freeway through downtown Minneapolis (I-94/I-35W commons).
  
  This report describes several methodologies that were used to examine the impact of the VSL system within the I-94/I-35W
  
  commons high crash area. Numerous data sources were utilized, including video records of crash and near crash events, loop
  
  detector traffic measurements, machine vision sensor data, and actuations from the VSL system. A before-after approach was
  
  taken to examine the incident rates for crashes and near crashes using visually identified events within video data.
  
  Utilizing the unique capabilities of the Minnesota Traffic Observatory’s I-94 Freeway Lab, high resolution traffic
  
  measurements, collected by machine vision sensors at the bottleneck location, were used within a new cross-correlation based
  
  analysis methodology to measure and visualize shockwave activity before and after the implementation of the VSL system.
  
  
• Format:
  PDF
• Funding:
  CTS Project # 2013017 ; (c) 99008 (wo) 65
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:36989bebd3fd717ff42dbc66945bc07af3e77cdfad609a7a06ddbfc78a7f27ce
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/32164/dot_32164_DS1.pdf
• File Type:
  [PDF - 5.65 MB ]