Study of Macroscopic fundamental diagrams on Motorway Number 7 and Motorway Number 9

Abstract

The macroscopic fundamental diagram (MFD) is a tool used to study traffic at the city level, which covers a broader scope than traditional traffic analysis on individual roads or intersections. The MFD illustrates the relationship between traffic density and either speed or flow across road networks. This research explores the use of the total vehicle kilometers traveled (VKT), representing the total travel distance of users within the network, as an indicator of traffic flow, and Vehicle Hours Traveled (VHT), representing the total travel time of users, as an indicator of traffic density. Data were collected on the Motorway No. 7 and No. 9. The results show that the derived MFD has characteristics similar to the traditional flow-density relationship (Fundamental diagram) of given road. These findings can be applied to other road networks to forecast travel demand, improve traffic management, and inform future road construction planning.