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GOALS AND RESEARCH APPROACH
SIMULATION MODEL COMPARISONS
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1985 HCM methodology 50 Mph Design alignment analysis methodology Average travel speed boundary values calibration and validation capacity and level corresponding default values defined delay values design speed highways design speed roads design speed two-lane design speeds less direction driver field measurement Figure Figure Figure freeway Highway Capacity Highway Capacity Manual highways with design imperial units input less than 60 level of service level terrain low design speed Midwest Research Institute model calibration Mph Design Speed multi-lane highways operating conditions operating speed output passing zones PCPH percent no-passing zones percent time delay platoons primary parameter procedure relationships rolling terrain sensitive Service Criteria simulation model specific grade speed two-lane highways spreadsheet study sections Table Table Table terrain segments terrain types test section Texas Transportation Institute traffic operational TRARR model two-lane roads TWOPAS and TRARR TWOPAS model types of facilities University of Calgary vehicle characteristics vehicle types Washington D.C.