2D. Traffic analysis Flashcards
(e.g., volume studies, peak hour factor, speed studies, modal split, trip generation, traffic impact studies)
What are the 3 levels of analysis defined by the HCM
HCM: Volume 1 - Chapter 2
Operational analysis:
Typically focuses on current or near-term conditions. It involves detailed inputs to HCM procedures, with no or minimal use of default values.
Design analysis:
Typically uses HCM procedures to identify the characteristics of a transportation facility that will allow it to operate at a desired LOS, with some use of default values.
Planning and preliminary engineering analyses:
typically focus on initial problem identification, long-range analyses, and performance monitoring applications, where many facilities or alternatives must be evaluated quickly or when specific input values to procedures are not known. The extensive use of default values is required.
What is a peak hour factor?
PE. Handbook 5.1.3.3
PHF = V / (V15*4)
Where
PHF =peak hourfactor
V = hourlyvolumeforhourofanalysis
V15 =maximum15minflowratewithinpeakhour
