Average Daily Traffic (ADT) is utilised as important basic data in the transportation and road sector to determine the geometry of new roads and to predict the future service levels of existing roads based on planned traffic volume. As the installation of traffic counters to obtain long duration volumes like ADT is expensive, carrying out a short-duration survey and extrapolating the volumes to ADT would be more economical. The use of the ‘Expansion Factor Method’ to extrapolate short duration volumes to ADT has been discussed in this research.

Meegahapola, M.D.D.V., Ranamuka, R.D.S.M., & Sathyaprasa, I.M.S. (2017). Estimation of Average Daily Traffic (ADT) using short-duration volume counts [Extended Abstract]. In T.L. Gunaruwan (Ed.), Proceedings of 2nd International Conference on Research for Transport and Logistics Industry 2017 (pp. 117-121). Sri Lanka Society of Transport and Logistics. https://slstl.lk/r4tli-2017/