The pedestrian crossing process in roundabout areas is modeled as a two-stage crossing demarked by a splitter island. A composite queuing system is used to describe the process. The system was simulated by using Arena, a general-purpose simulator chosen for its convenient flowchart modeling capability and vast built-in statistical analysis tools. The model outputs indicate that this composite model is able to provide basic insights into the pedestrian crossing process. Sensitivity analyses revealed that often-overlooked traffic parameters, such as the pedestrian holding space in the splitter island, could have significant impacts on pedestrian crossing performance and capacity.