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:
- Increased retroreflectivity of STOP signs.
- Flashing beacons at STOP-controlled intersections.
- STOP AHEAD pavement markings.
- Installing center two-way left-turn lanes on two-lane roads.
The Phase II study (retrospective) was completed for:
- Improved curve delineation.
- Offset improvements for left-turn lanes.
- Lane and shoulder width combinations on rural, two-lane, undivided roads.
- 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:
- Surface friction treatment on curves.
- Surface friction treatment on ramps.
- In-lane pavement markings for curve warning.
- Larger chevrons.
- Edgeline rumble stripEs on curves.
- Red light indicator lights.
Phase IV is complete. This phase was conducted for:
- Rural two-lane undivided roads: nighttime delineation for curves (three strategies).
- 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:
- Combination of centerline and edgeline rumble strips.
- Combination of median barrier and rumble strips.
- Signalized intersection multicountermeasures.
- 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:
- Pedestrian signals, signs, markings, etc.
- Driver feedback signs.
- Active intersection conflict warning systems/dynamic signing.
- 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.