This paper aims to quantify the impact of highway geometry characteristics of rural two-lane, two-way roads on traffic performance. To achieve this aim, twelve sites were selected from Minoufiya Governorate, Egypt. Each site is consisted of two elements, horizontal curve and tangent, with various geometric characteristics. Traffic surveys were carried out using automatic traffic counters to collect sufficient traffic data at each site for both curve and tangent elements. Preliminary investigations examined the impact of element type (curve and tangent) on traffic stream relationships, average travel speed, and follower density (the best performance measure in Egypt). Several regression models were developed to quantify the impact of geometric characteristics on follower density for tangents and curves separately. The best model, in the case of tangents, was function of pavement width, number of side access points, tangent length and flow rate. For curve elements, the best model was function of curve radius, forward visibility and flow rate. Flow rate is the main platooning variable and should be included in all models. The developed models are very useful and can be used to make effective operational improvements on such roads.