Evaluating Strategies for Work Zone Transportation Management Plans (2020) / Chapter Skim
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Pages 158-163
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158 8.0 Summary of Findings 8.1. Standalone Guidebook Although there is a wealth of information, it is scattered among published research, DOT handbooks, manuals, plans, as well as unpublished documentation.
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159 speeds. The vehicle speeds were compared separately according to the time period -- morning peak period (6:00 to 9:00 a.m.)
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160 Conditions most conducive to favorable application of truck lane restrictions are freeways with two or more lanes in each direction, interchanges spaced more than 2 to 3 mi apart, and with low ramp volumes and truck percentages between 10% to 25% of the total traffic stream. Results also suggest that where crash data are available, transportation agencies conduct the before-and-after evaluations of the safety characteristics.
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161 • The team also analyzed headways between vehicles on the mainline of the freeway at the merging area of ramp and mainline to determine the changes, if any, that occurred between with and without implementing ramp metering. The results were somewhat different for the two study areas, primarily because of roadway capacity condition.
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162 exceed 400–600 vph)
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163 8.3. Suggestions for Future Research The field evaluations conducted as part of this research effort are the first of their kind in a work zone setting and act as a good starting point for future research.
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