Highway Capacity Manual Methodologies for Corridors Involving Freeways and Surface Streets (2020) / Chapter Skim
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Pages 14-17
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From page 14... ...
- 8 - 3. Critical Review of the HCM This section presents a critical review of the methods in the Highway Capacity Manual 6th Edition, highlighting strengths and identifying weaknesses related to the evaluation of trips using freeways and surface streets.
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From page 15... ...
- 9 - ramps, performance measures are estimated separately for the influence area (consisting of the two rightmost lanes, and for a length of 1,500 ft.) and the remaining leftmost lanes.
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From page 16... ...
- 10 - Impacts of spillback on weaving segments: Similar considerations to those described above are also relevant for weaving segments. Along weaves, the on-ramp that is part of the weave may be affected in different ways based on whether the spillback reaches its gore point or not.
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From page 17... ...
- 11 - The procedure includes an adjustment to consider spillback from the downstream intersection to the upstream in the form of additional lost time. This lost time is estimated for each upstream movement as a function of the downstream queue length and storage availability.
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