ESTIMATION OF HOURLY TRAFFIC FLOW PROFILES USING SPEED DATA AND ANNUAL AVERAGE DAILY TRAFFIC DATA

摘要

A framework for performance evaluation and active management of a transportation network infrastructure reconstructs traffic flow profiles by modeling annual average daily traffic data and collected traffic speed data to estimate an hourly traffic flow profile for a roadway segment, or link. Total daily flow for a link is derived from the corresponding annual average daily traffic data for that link, and is adjusting by the day of week and the monthly seasonal factors. An hourly flow distribution profile for a roadway link is then constructed using the traffic speed data relative to that link.

主权项

1. A method of estimating an hourly traffic flow profile for a roadway segment, comprising:
computing a daily traffic flow value at a location on a roadway segment, and for a specified direction at a specified date, from annual average daily traffic data; determining an hourly flow distribution profile for the location and for the specified direction at the specified date from collected traffic speed data, by 1) constructing temporal templates to detected traffic flows values, 2) developing one or more speed profiles from the collected traffic speed data, and 3) assigning a temporal template to a speed profile; and calculating hourly traffic flow profiles by multiplying the hourly flow distribution profile by the daily flow value.