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Region Statistic (1 = Poor, 5 = Outstanding) East North Central Number of Responses 4 4 2 0 4 1 0 3 1 Northeast Average 4.30 4.17 3.67 3.25 2.50 4.00 - 3.00 4.00 Northeast Standard Deviation 0.82 0.75 0.58 0.50 1.91 - - 0.00 1.41 Northeast Number of Responses 10 6 3 4 4 1 0 2 2 Northwest Average 3.50 3.00 - - - 4.00 - - - Northwest Standard Deviation 0.71 - - - - - - - - Northwest Number of Responses 2 1 0 0 0 1 0 0 0 South Average 4.17 3.83 4.50 - 3.33 4.00 - - - South Standard Deviation 0.75 1.17 0.71 - 0.58 0.00 - - - South Number of Responses 6 6 2 0 3 2 0 0 0 Southeast Average 4.00 4.00 5.00 3.50 4.00 2.50 - 3.50 - Southeast Standard Deviation 0.00 1.00 - 0.71 - 2.12 - 0.71 - Southeast Number of Responses 5 3 1 2 1 2 0 2 0 Southwest Average 3.33 5.00 4.00 4.00 3.00 - 2.50 - - Southwest Standard Deviation 0.58 - 0.00 - 0.00 - 0.71 - - Southwest Number of Responses 3 1 2 1 2 0 2 0 0 West Average 4.50 1.00 2.00 3.50 - 4.00 - - 3.00 Traveler Inform ation System s Q ueue W arning D ynam ic Lane M erge D ynam ic (Variable) Speed Lim it W ork Zone D ata C ollection Technologies W ork Zone Location Technologies W ork Zone Intrusion A larm N otification of C onstruction Equipm ent Entering/Exiting O ther
Region Statistic Traveler Inform ation System s Q ueue W arning D ynam ic Lane M erge D ynam ic (Variable) Speed Lim it W ork Zone D ata C ollection Technologies W ork Zone Location Technologies W ork Zone Intrusion A larm N otification of C onstruction Equipm ent Entering/Exiting O ther (1 = Poor, 5 = Outstanding) West Standard Deviation 0.71 - 1.41 0.71 - - - - - West Number of Responses 2 1 2 2 0 1 0 0 1 West North Central Average 4.50 4.00 - 3.00 - - - - - West North Central Standard Deviation 0.71 0.00 - - - - - - - West North Central Number of Responses 2 3 0 1 0 0 0 0 0 NOTES: Statistics exclude performance ratings of 0 (= no opinion); a (-) indicates that the value could not be calculated because of an insufficient number of responses.
I-1Â Â A P P E N D I X I Summary of Synthesis Findings by Smart Work Zone Technology
Table I-1. Summary of synthesis findings by smart work zone technology. Smart Work Zone Technology % of DOTs that Already Implemented Technology % of DOTs that Plan to Implement Technology Average DOT Performance Rating (1 = Poor, 5 = Outstanding) Example Findings from Literature Example Resources General - - - ⢠Evaluation framework developed and used to determine benefit-cost ratios (2.1 to 1 to 6.9 to 1) (Edara et al. 2013a) ⢠68% of 147 work zone safety technology studies concern speed reduction systems (Nnaji et al. 2020) ⢠Federal Highway Administration (FHWA) Work Zone Intelligent Transportation Systems (ITS) Implementation Guide (Ullman et al. 2014) ⢠FHWA Work Zone ITS Implementation Tool (GitHub 2021b) ⢠Connecticut DOT Smart Work Zones Guide (IBI Group 2017) ⢠Smart Work Zone Design Standards (Massachusetts DOT 2016c) ⢠Smart Work Zone Standard Operating Procedures (Massachusetts DOT 2016a)
