Identification and Evaluation of the Cost-Effectiveness of Highway Design Features to Reduce Nonrecurrent Congestion (2014) / Chapter Skim
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Pages 77-84
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From page 77... ...
77 The reliability models developed in SHRP 2 Project L03 served as a starting point in Project L07 for evaluating the effectiveness of design treatments in reducing nonrecurrent congestion and improving travel time reliability. However, although these models included a variable (R0.05″)
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78 Figure A.1. Freeway stations used in Task IV-1 analysis.
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79 TTI for Hours with Rain >–0.05 in. For each of the five TTI percentiles, speed data from those hours with rain ≥0.05 in.
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80 TTI for Hours with Snow >–0.01 in. For each of the five TTI percentiles, speed data from those hours with snow ≥0.01 in.
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81 observed values for each percentile with the predicted TTI values by using the L03 reliability models. The charts shown in Figure A.4 display an observed TTI distribution and a L03-predicted TTI distribution for several HYL combinations.
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82 Figure A.4. Excerpt of figures comparing observed with L03-predicted TTI distributions.
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83 Figure A.6 shows the resulting total LHL values (including WZLHL and LHL due to incidents) per hour with all links combined and averaged by mile.
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84 and S0.01″)
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