Toolbox of Countermeasures and Their Potential Effectiveness for ...
Toolbox of Countermeasures and Their Potential Effectiveness for ...
Toolbox of Countermeasures and Their Potential Effectiveness for ...
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<strong>Toolbox</strong> <strong>of</strong> <strong>Countermeasures</strong> <strong>and</strong> <strong>Their</strong> <strong>Potential</strong> <strong>Effectiveness</strong> <strong>for</strong> Roadway Departure CrashesTable 6 (continued)Sign/Marking/Operational <strong>Countermeasures</strong>Countermeasure(s)MARKINGSDelineate multiple lanes(painted lane lines)Install centerline markingsInstall chevron converging patternmarkings on pavementInstall edgelines <strong>and</strong> centerlinesInstall edgelines, centerlines <strong>and</strong>delineatorsInstall edgeline markingsInstall edgeline markings(from 4 to 6 in)Install edgeline markings(8 in)Install raised pavement markers(snowplowable) whereDOC = degree <strong>of</strong> curvatureREGULATORYInstall no-passing lineProhibit on-street parkingReduce mean speed by 5%through speed limit change<strong>and</strong> en<strong>for</strong>cementReduce mean speed by 10%through speed limit change<strong>and</strong> en<strong>for</strong>cementCrashSeverityAreaTypeRoad TypeAllCrashesAll Urban Multilane 18(22) 8All 33 9Injury All 2-lane 1(6) 8PDO All 2-lane -1(5) 8All Urban 38(6) 12Injury Freeway 56(26) 4All Rural Undivided -3(21) 2 1,000 - 4,000` Injury All All 24(11) 8Injury All All 45(11) 8All 44 9 45 9 66 9 f 45 9 5,000/laneAll 30 9Injury 15 9PDO 8 9Injury Rural 2-lane 3(4) 8PDO Rural 2-lane 3(11) 8Injury Rural 2-lane -5(8) 8PDO Rural 2-lane 1(15) 8All Mostly Rural 4-lane freeway b -13(14) 3 ≤20,000All Mostly Rural 4-lane freeway b 33(21) 3 3.5 b -43(9) 3 ≤5,000All Mostly Rural 2-lane, DOC>3.5 b -26(10) 3 5,001 - 15,000All Mostly Rural 2-lane, DOC>3.5 b -3(11) 3 15,001 - 20,000All Mostly Rural 2-lane, DOC
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