Estimation of Origin-Destination Matrix from Traffic Counts:
A case Study of Lahore-Islamabad Motorway

Conventional methods of estimating origin-destination matrix by using questionnaire surveys are expensive, time consuming and disruptive to traffic movement. Recently, several attempts have been made to estimate origin-destination matrix from traffic counts. This research aims to find out a simple and pragmatic model that can be applied on motorways. After reviewing the literature, the Furness Model is selected for empirical investigation on M-2. Entropy maximization principle is also tested for applicability. Further, the toll revenue management database of M-2 is queried in Access environment for extracting true origin-destination matrix. Matrices estimated by using Furness model are then compared with the true ones for calculating the accuracy of the model. Moreover, the OD matrix is analyzed to determine the travel patterns on M-2. The results successfully demonstrate the applicability of Furness Model by using a prior OD matrix though entropy maximization principle is found invalid. The toll revenue management database has been successfully queried to retrieve the true OD matrix of M-2. Upon analyzing the OD matrix of M-2, it is found that the route is also being used as a distributor road in addition to its role as a strategic motorway. A strong link has been evidenced between M-2 and the connecting M-3 with regards to traffic movement.