Identification and Evaluation of the Cost-Effectiveness of Highway Design Features to Reduce Nonrecurrent Congestion (2014) / Chapter Skim
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Pages 60-70
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60 Objective The research team developed an analysis tool to implement the analytical procedures developed in this research. The purpose of the Analysis Tool is to allow highway agencies to analyze and compare the effectiveness of a range of design treatments at improving travel time reliability for a given highway segment.
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61 to effectiveness (such as the number of crashes expected to be reduced by the design treatment) can be adjusted by the user to match local conditions.
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62 44 Set default fatal crash reduction to 0% to err on the side of a conservative benefit estimate, given that most freeway segments will not experience many fatal animal– vehicle collisions. • Snow fence 44 Refined the default installation cost on the basis of the best available information for the installation and maintenance cost of a typical snow fence; and 44 Set default fatal crash reduction to 0% to err on the side of a conservative benefit estimate, given that most freeway segments will not experience many snow-related fatal crashes that would be alleviated by a snow fence.
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63 Note: Number above bar indicates number of lanes (2 or 4) ; L = low crash count; H = high crash count.
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64 Figure 7.3. Delay reduction results.
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65 Figure 7.3. Delay reduction results.
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66 Figure 7.4. Net present benefit results.
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67 Figure 7.4. Net present benefit results.
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68 Note: Number above bar indicates number of lanes (2 or 4) ; L = low crash count; H = high crash count.
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69 Note: Number above bar indicates number of lanes (2 or 4) ; L = low crash count; H = high crash count.
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70 Table 7.2. Scenarios and Codes Used in Figures 7.3 Through 7.5 Scenario Location No.
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