Best Practices In Lane-Departure Avoidance and Traffic Calming

This domestic scan was developed from proposals of state highway engineers concerned about the unacceptable levels of run-off-road crashes, injuries, and fatalities on the nation’s highways. The scan team’s mission was to identify transportation agencies with successful solutions to lane departures, to be educated on those solutions, and to disseminate information from these promising programs to other transportation agencies. The scan tour’s scope was further restricted to low-cost measures on high-speed rural roadways. The scan team also chose to focus primarily on engineering solutions through standard engineering practices instead of on education, enforcement or emergency-response strategies. The team chose to focus on the following program categories as topics of interest; specifically, transportation agencies: that have advanced highway safety programs; that employ systematic countermeasures (i.e., proactive measures); with proven successes in mitigating lane departures; and that have implemented low-cost programs. The team focused on these relatively low-cost initiatives taken by transportation agencies to mitigate the causes and effects of lane departures: Shoulder rumble strips (SRS); Centerline Rumble Strips (CLRS); Edge line rumble stripes (ELRS); Safety edge and pavement drop-offs (especially high-severity drop-offs); Paved shoulder widening; Edge line pavement markings; Pavement markings at curves; Additional signing, especially at horizontal curves; Dynamic signing (e.g. speed feedback and light-emitting diode [LED] illuminated signs); Cable median barriers; and Removal of frequently hit objects (e.g., trees and utility poles).

• Record URL:
  http://www.domesticscan.org/wp-content/uploads/NCHRP20-68A_09-03.pdf
• 
• Corporate Authors:

  Arora and Associates, P.C.

  3120 Princeton Pike, 3rd Floor
  Lawrenceville, NJ  United States  08648-2372

  American Association of State Highway and Transportation Officials (AASHTO)

  444 North Capitol Street, NW
  Washington, DC  United States  20001

  National Cooperative Highway Research Program

  Transportation Research Board
  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Nelson, Mark
  • Miller, John P
  • Zisman, Ina
  • Isackson, Cassandra
  • Helms, Daniel
  • Albin, Richard B
  • Focke, Dean
• Publication Date: 2011-8

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Domestic Scan Team Report
• Features: Appendices; Figures; Photos;
• Pagination: 115p

Subject/Index Terms

• TRT Terms: Best practices; Costs; Countermeasures; Dropoffs (Pavements); Edge lines; Median barriers; Ran off road crashes; Road markings; Road shoulders; Rumble strips; Rural highways; Traffic calming; Traffic signs
• Uncontrolled Terms: Dynamic signing; Fixed objects (Roadside); Lane departures; Shoulder widening
• Subject Areas: Design; Highways; Operations and Traffic Management; Safety and Human Factors; I21: Planning of Transport Infrastructure; I73: Traffic Control; I83: Accidents and the Human Factor;

Filing Info

• Accession Number: 01549330
• Record Type: Publication
• Report/Paper Numbers: NCHRP Project 20-68A, Scan 09-03
• Files: TRIS
• Created Date: Dec 31 2014 9:52AM