Estimating Annual Average Daily Traffic Using Hourly Traffic Pattern and Grouping in National Highway

Abstract

This study shows how to estimate AADT(Annual Average Daily Traffic) on temporary count data using new grouping method. This study deals with clustering permanent traffic counts using monthly adjustment factor, daily adjustment factor and a percentage of hourly volume. This study uses a percentage of hourly volume comparing with other studies. Cluster analysis is used and 5 groups is suitable. First, make average of monthly adjustment factor, average of daily adjustment factor, a percentage of hourly volume for each group. Next estimate AADT using 24 hour volume(not holiday) and two adjustment factors. Goodness of fit test is used to find what groups are applicable. MAPE(Mean Absolute Percentage Error) is 8.7% in this method. It is under 1.5% comparing with other method(using adjustment factors in same section). This method is better than other studies because it can apply all temporary counts data.

A supervised learning approach to calibrating annual average daily traffic against highway roadworks: the impact of demographic and weather conditions

“…Annual average daily traffic (AADT) is defined as the average number of daily traffic flows at a certain location over an entire year (Sfyridis and Agnolucci 2020). It is wellknown that AADT plays a pivotal role in providing essential information to present a wide picture of traffic flows, evaluate traffic patterns, and predict the level-of-service of roads in the future (Eom et al 2006;Sfyridis and Agnolucci 2020;Wang, Gan, and Alluri 2013;Gastaldi, Gecchele, and Rossi 2014;Xia et al 1999;Gastaldi et al 2013;Ha and Oh 2014;Khan et al 2019;Jessberger et al 2016). As a way to collect AADT data, the permanent traffic count method is intended to collect 24-hour basis traffic volume during 365 days a year, using automatic traffic counters (Sfyridis and Agnolucci 2020; Department for Transport 2020).…”

“…As a way to collect AADT data, the permanent traffic count method is intended to collect 24-hour basis traffic volume during 365 days a year, using automatic traffic counters (Sfyridis and Agnolucci 2020; Department for Transport 2020). Portable devices are also used to collect traffic data 1-5 times over a year, as the short-term traffic count method (Ha and Oh 2014).…”