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305Â Â Temporary Pavement Markings and Marking Removal Methods by Climate Region A P P E N D I X G Table G-1. Survey results for frequency of use of temporary markings by climate region. Region Statistic Ep ox y Pr ef or m ed P la st ic Te m po ra ry T ap e Th er m op la st ic Tr af fic P ai nt B ut to ns Ta bs O th er (5=Always, 4=Almost Always, 3=Sometimes, 2=Rarely, 1=Never) All Average 1.58 1.31 2.52 1.54 3.55 1.70 2.37 1.44 Standard Deviation 1.09 0.72 1.11 0.85 1.24 1.18 1.31 1.03 Number of Responses 48 48 50 48 51 47 51 16 Central Average 1.17 1.00 2.43 1.33 4.00 1.00 1.43 1.33 Standard Deviation 0.41 0.00 1.13 0.82 0.82 0.00 1.13 0.58 Number of Responses 6 6 7 6 7 6 7 3 East North Central Average 2.00 1.25 2.50 1.25 4.25 1.67 2.25 n/a Standard Deviation 1.41 0.50 1.73 0.50 0.96 1.15 1.50 n/a Number of Responses 4 4 4 4 4 3 4 0 Northeast Average 1.55 1.36 2.58 1.64 3.50 1.18 2.33 1.00 Standard Deviation 1.29 0.81 1.16 1.12 1.31 0.60 1.37 0.00 Number of Responses 11 11 12 11 12 11 12 4 Northwest Average 1.00 1.00 3.00 1.00 3.00 3.25 3.50 1.00 Standard Deviation 0.00 0.00 1.41 0.00 1.41 1.71 1.29 n/a Number of Responses 4 4 4 4 4 4 4 1 South Average 1.67 1.67 3.00 1.83 3.83 2.33 3.33 2.50 Standard Deviation 0.82 0.82 0.63 0.75 0.75 1.21 1.03 2.12 Number of Responses 6 6 6 6 6 6 6 2
306 Temporary Pavement Markings Placement and Removal Practices in Work Zones Region Statistic Ep ox y Pr ef or m ed P la st ic Te m po ra ry T ap e Th er m op la st ic Tr af fic P ai nt B ut to ns Ta bs O th er (5=Always, 4=Almost Always, 3=Sometimes, 2=Rarely, 1=Never) Southeast Average 1.50 1.83 2.00 2.33 3.67 1.50 1.17 1.00 Standard Deviation 0.84 1.33 0.71 1.03 1.03 1.22 0.41 0.00 Number of Responses 6 6 5 6 6 6 6 3 Southwest Average 1.67 1.00 1.50 1.00 4.50 1.00 3.00 n/a Standard Deviation 1.15 0.00 0.58 0.00 0.58 0.00 0.00 n/a Number of Responses 3 3 4 3 4 3 4 0 West Average 2.00 1.33 3.67 1.67 3.00 3.00 3.00 2.50 Standard Deviation 1.73 0.58 1.15 0.58 1.73 1.73 1.73 2.12 Number of Responses 3 3 3 3 3 3 3 2 West North Central Average 2.00 1.00 2.20 1.20 2.00 1.60 2.40 1.00 Standard Deviation 1.73 0.00 0.84 0.45 1.41 0.89 1.14 n/a Number of Responses 5 5 5 5 5 5 5 1
Temporary Pavement Markings and Marking Removal Methods by Climate Region 307Â Â Table G-2. Survey results for frequency of use of pavement-marking removal methods by climate region. Region Statistic G rin di ng Sa nd bl as tin g Sh ot B la st in g W at er B la st in g M ill in g B la ck T ap e Sl ur ry S ea l O th er (5=Always, 4=Almost Always, 3=Sometimes, 2=Rarely, 1=Never) All Average 2.80 1.94 1.77 2.76 1.76 1.78 1.22 1.50 Standard Deviation 1.11 0.98 0.91 0.99 0.92 1.05 0.63 1.21 Number of Responses 50 48 47 49 46 49 46 16 Central Average 2.57 1.83 1.67 3.00 1.40 2.00 1.00 1.00 Standard Deviation 1.13 0.98 1.03 0.63 0.89 0.89 0.00 0.00 Number of Responses 7 6 6 6 5 6 5 3 East North Central Average 3.25 1.75 2.00 2.75 2.50 2.25 1.50 1.00 Standard Deviation 0.50 0.96 1.15 0.50 1.00 0.96 1.00 n/a Number of Responses 4 4 4 4 4 4 4 1 Northeast Average 2.75 1.73 1.82 2.18 1.73 1.58 1.09 1.60 Standard Deviation 1.42 1.01 1.17 1.08 1.19 1.16 0.30 1.34 Number of Responses 12 11 11 11 11 12 11 5 Northwest Average 2.75 2.50 1.50 2.00 1.50 2.00 1.25 3.00 Standard Deviation 1.71 1.73 0.58 1.41 0.58 1.15 0.50 2.83 Number of Responses 4 4 4 4 4 4 4 2 South Average 2.17 2.00 2.00 3.00 1.67 2.17 1.50 1.00 Standard Deviation 0.98 0.89 0.89 1.41 0.82 1.33 1.22 n/a Number of Responses 6 6 6 6 6 6 6 1
308 Temporary Pavement Markings Placement and Removal Practices in Work Zones Region Statistic G rin di ng Sa nd bl as tin g Sh ot B la st in g W at er B la st in g M ill in g B la ck T ap e Sl ur ry S ea l O th er (5=Always, 4=Almost Always, 3=Sometimes, 2=Rarely, 1=Never) Southeast Average 3.00 2.33 1.80 2.67 2.33 1.67 1.00 1.50 Standard Deviation 0.89 0.82 0.84 0.52 0.82 1.21 0.00 0.71 Number of Responses 6 6 5 6 6 6 6 2 Southwest Average 2.67 1.33 1.33 4.00 1.33 1.00 1.33 n/a Standard Deviation 1.15 0.58 0.58 0.00 0.58 0.00 0.58 n/a Number of Responses 3 3 3 4 3 3 3 0 West Average 3.00 2.67 2.00 3.33 2.00 1.67 2.00 n/a Standard Deviation 1.00 0.58 1.00 0.58 0.00 1.15 1.41 n/a Number of Responses 3 3 3 3 2 3 2 0 West North Central Average 3.40 1.60 1.60 2.80 1.40 1.60 1.00 1.00 Standard Deviation 0.55 0.89 0.89 0.45 0.89 0.89 0.00 0.00 Number of Responses 5 5 5 5 5 5 5 2
