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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, the Pavement Safety Performance, is a retrospective study started in November 2012 and will be completed in February 2014. Eleven strategies are being evaluated for:

  • Asphalt; thin hot-mix asphalt overlay, chip seal, microsurfacing, ultra-thin bonded wearing course, open graded friction course, and slurry seal.
  • Concrete; diamond grinding, ultra-thin bonded wearing course, microsurfacing, grooving.
  • Everyday Counts 2; high friction surface treatment.

The 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 will be determined by Technical Advisory Committee (TAC) members in the Ninth Annual TAC Meeting, May of 2013.

 

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