Hourly and Daily Traffic Expansion Factors on Selected Roads in Gaza, Palestine

Yahya R. Sarraj*
Department of Civil Engineering, Islamic University of Gaza, P. O. Box 108, Rimal, Gaza, Palestine



The shortage of sufficient, reliable and continuous traffic data in many developing countries makes it difficult for traffic engineers and researchers. Traffic data are essential for both planning and design of transportation facilities.


This work tries to provide data that in order to help local experts in Gaza city to provide better estimates of the average daily traffic (ADT) and hence better transportation facilities.


The analysis and discussion are based on continuous traffic flow counts conducted on three selected main streets in Gaza. Data were collected for 24 hours on seven consecutive days on each street.


The results indicate that the average hourly expansion factors(HEFs) have a margin of error for the period between 7:00 and 16:00 that does not exceed ±3%. The results also indicate that the average daily expansion factors (DEFs) on the three streets have a maximum margin of error of 3.2% on both Sunday and Monday. On the other hand, the analysis proved that the maximum peak hour volume was 2864 vehicles/hour on Al Jalaa Street between 7:00 and 8:00 and the average peak-to-daily ratio (p/d) of the three streets was found to be 7.18%. The maximum directional traffic split (D) was found to be 60% in the heaviest direction of traffic flow during the peak period.


The HEFs and DEFs produced in this work can be used with a 95% confidence on the main streets of Gaza city.

Keywords: Traffic expansion factor, Daily expansion factor, p/d, K-factor, Directional split, Gaza.

Abstract Information

Identifiers and Pagination:

Year: 2018
Volume: 12
Publisher Item Identifier: EA-TOCIEJ-2018-42

Article History:

Received Date: 16/7/2018
Revision Received Date: 12/10/2018
Acceptance Date: 17/10/2018
Electronic publication date: 29/10/2018
Collection year: 2018

© 2018 Yahya R. Sarraj.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Correspondence: Address correspondence to this author at the Department of Civil Engineering, Islamic University of Gaza, P. O. Box 108, Rimal, Gaza, Palestine; Tel: +970-8- 2644400; E-mails: ysarraj@iugaza.edu.ps, ysarraj62@gmail.com