Extensions of theoretical capacity models to account for special conditions |
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| Institution: | 1. Kittelson and Associates, 610 SW Alder Street, Suite No 700, Portland, OR 97205, USA;2. University of Idaho, Moscow, Idaho, USA;3. Ruhr University, Bochum, Germany;4. Queensland University of Technology, Brisbane, Australia;1. Applied Economics & Management Research Group, Universidad de Sevilla, Spain;2. Department of Applied Economics III, Universidad de Sevilla, Spain;1. Agriculture and Forest Engineering Department, University of Lleida, Alcalde Rovira Roure 191, 25198 Lleida, Spain;2. USDA Forest Service, Rocky Mountain Research Station, Missoula Fire Sciences Laboratory, 5775 US Highway 10W, Missoula, MT 59808, USA;3. Department of Forest Engineering, Resources and Management, College of Forestry, Oregon State University, 043 Peavy Hall, Corvallis, OR, 97331, USA;4. Meteorological Service of Catalonia, Carrer Berlín 38–46, 08029 Barcelona, Spain;5. Lightning Research Group, Technical University of Catalonia, Campus de Terrassa, Edifici TR1, Carrer Colom 1, Terrassa, 08222 Barcelona, Spain;6. Forest Sciences Centre of Catalonia, Carretera de Sant Llorenç de Morunys km 2, Solsona, 25280 Lleida, Spain;1. Mobility and Logistics Laboratory, Federal University of de Santa Maria – Campus Cachoeira do Sul, Brazil;2. Industrial and Transportation Engineering Department, Federal University of Rio Grande do Sul, Porto Alegre, Brazil |
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| Abstract: | The computational procedures used to analyze two-way stop-controlled intersections were extended in the National Cooperative Highway Research Project 3-46 to account for a number of effects commonly observed at actual unsignalized intersections. This paper presents theoretical extensions that can account for commonly observed phenomena, such as two-stage gap acceptance when median storage is available; right-turn “sneakers” at flared minor-street approaches; non-random arrivals caused by upstream signals; impedance due to pedestrian crossings; and delay to major-street through vehicles using shared left-turn and through lanes. The individual effects are then combined into an analytical framework suitable for inclusion in the Unsignalized Intersections procedures of the 1997 “Highway Capacity Manual”. © |
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