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Federal Highway Administration
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ELCSI-PFS: Overview | Phases of ELCSI-PFS | Technical Advisory Committee Members | Technical Advisory Committee Meetings | Publications | Treatment Databases | NCHRP Project 17-25: Crash Reduction Factors forTraffic Engineering and Its Improvements |
NCHRP Project 17-35: Evaluation of Safety Strategies at Signalized Intersections

 

 

Evaluations of Low Cost Safety Improvements Pooled Fund Study

 

Evaluations of Low Cost Safety Improvements Pooled Fund Study (ELCSI–PFS) Phases

The Phase I study (retrospective) was competed for:

  1. Increased retroreflectivity of STOP signs.
  2. Flashing beacons at STOP-controlled intersections.
  3. STOP AHEAD pavement markings.
  4. Installing center two-way left-turn lanes on two-lane roads.

The Phase II study (retrospective) was completed for:

  1. Improved curve delineation.
  2. Offset improvements for left-turn lanes.
  3. Lane and shoulder width combinations on rural, two-lane, undivided roads.
  4. Advance street name signs.

The Phase III (build to evaluate) “before” evaluation is complete, and is currently in a data-collection period for “after” evaluation of:

  1. Surface friction treatment on curves.
  2. Surface friction treatment on ramps.
  3. In-lane pavement markings for curve warning.
  4. Larger chevrons.
  5. Edgeline rumble stripEs on curves.
  6. Red light indicator lights.

Phase IV is complete. This phase was conducted for:

  1. Rural two-lane undivided roads: nighttime delineation for curves (three strategies).
  2. Rural traffic calming for small towns (three strategies).

Phase V is a prospective study and the “before” evaluation is complete. This study is currently in a data-collection period for “after” evaluation of:

  1. Combination of centerline and edgeline rumble strips.
  2. Combination of median barrier and rumble strips.
  3. Signalized intersection multicountermeasures.
  4. STOP-controlled intersection multicountermeasures.

Phase VI, Pavement Safety Performance, was completed in January 2014. Its technical report will be published in the summer of 2014. Eleven strategies were evaluated for:

  • Asphalt Pavement

    1. Thin hot-mix asphalt overlay.
    2. Chip seal, microsurfacing.
    3. Ultra-thin bonded wearing course.
    4. Open-graded friction course.
    5. Slurry seal.

  • Concrete Pavement

    1. Diamond grinding.
    2. Ultra-thin bonded wearing course.
    3. Microsurfacing and grooving.

High-Friction Surface Treatment, the second phase of Every Day Counts (EDC2).

Phase VII is a retrospective study. This study started in November 2012 and it is expected to be completed by February 2015. The following four strategies will be evaluated:

  1. Pedestrian signals, signs, markings, etc.
  2. Driver feedback signs.
  3. Active intersection conflict warning systems/dynamic signing.
  4. Pavement marking types and characteristics.

Phase VIII is a retrospective study. This study started in August of 2013 and it is to be completed in 2015. The following five strategies will be evaluated:  

  1. Restricted crossing U-turn (RCUT).
  2. Flashing yellow arrows.   
  3. Access management. 
  4. Realignment of horizontal curvature.
  5. Profiled thermoplastic pavement markings.

 

Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000
Turner-Fairbank Highway Research Center | 6300 Georgetown Pike | McLean, VA | 22101