TABLE 1 Continued – PROPOSED SAFETY SERVICE LIFE REDUCTION PREVENTABLE ACCIDENTS IMPROVEMENT ESTIMATES FACTOR % Install pavement 2 Years 20 Roadway related - off roadway on markings shoulder or beyond shoulder Install edge markings Two vehicles going same direction - sideswipe Two motor vehicles going opposite direction - head on Install 2 Years 10 First harmful event - collision of a motor pedestrian crosswalk/ vehicle with a pedestrian school zone markings Install raised 2 Years 20 Surface condition - wet light condition - reflective pavement dark, not lighted or lighted markers Install guardrail or 10 Years 30 Roadway related - off roadway on concrete traffic Guardrail shoulder or beyond shoulder barrier Object struck - vehicle hit highway sign, 15 Years curb, culvert headwall or marker post, Concrete railroad signal pole, traffic signal pole, Barrier luminaire pole, utility pole, other fixed object, end of bridge pier, or support Install impact 10 Years 60 Object struck - vehicle hit highway sign, attenuator utility pole, end of bridge, (abutment or rail end) pier or support, or concrete barrier Safety treat utility 10 Years 35 Roadway related - off roadway on poles Install shoulder or beyond shoulder breakaway utility Object struck - fixed object poles Traffic (safety) 15 Years 25 Light condition - darkness not lighted or lighting darkness lighted
TABLE 1 – Continued PROPOSED SAFETY IMPROVEMENT SERVICE LIFE ESTIMATES REDUCTION FACTOR % PREVENTABLE ACCIDENTS Install pavement markings Install edge markings 2 Years 20 Roadway related - off roadway on shoulder or beyond shoulder Two vehicles going same direction - sideswipe Two motor vehicles going opposite direction - head on Install pedestrian crosswalk/ school zone markings 2 Years 10 First harmful event - collision of a motor vehicle with a pedestrian Install raised reflective pavement markers 2 Years 20 Surface condition - wet light condition - dark, not lighted or lighted Install guardrail or concrete traffic barrier 10 Years Guardrail 15 Years Concrete Barrier 30 Roadway related - off roadway on shoulder or beyond shoulder Object struck - vehicle hit highway sign, curb, culvert headwall or marker post, railroad signal pole, traffic signal pole, luminaire pole, utility pole, other fixed object, end of bridge pier, or support Install impact attenuator 10 Years 60 Object struck - vehicle hit highway sign, utility pole, end of bridge, (abutment or rail end) pier or support, or concrete barrier Safety treat utility poles Install breakaway utility poles 10 Years 35 Roadway related - off roadway on shoulder or beyond shoulder Object struck - fixed object Traffic (safety) lighting 15 Years 25 Light condition - darkness not lighted or darkness lighted
STBG-UZA-Criteria-Jan-2018.docx