AbstractWe present a new approach to estimating the distribution of free speeds based on the method of censored observations. The original distribution-free method of Kaplan–Meier is generalized to include partially censored data, i.e. observations that are censored with a certain probability. This is achieved using a composite time headway distribution model that is estimated as well. Using synthetic data, the method is validated. The method is applied using real life data collected at different two-lane rural roads in the Netherlands to establish free speed distributions and the differences between different vehicle-types.
Unified approach to estimating free speed distributions
Transportation Research Part B: Methodological ; 39 , 8 ; 709-727
2004-09-14
19 pages
Article (Journal)
Electronic Resource
English
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