Bicyclists can either use the vehicular travel lanes or the pedestrian sidewalk to traverse the roundabout. In instances where large volumes of bicycles are anticipated to use the sidewalk to traverse the roundabout, slip ramps can be integrated into the roundabout to accommodate the transition from road to sidewalk. When bicycles traverse the roundabout on the road, they are analyzed for capacity similarly to other vehicular traffic. Conversely, when they traverse the roundabout on the sidewalk, they are analyzed as pedestrians. The volume of bicycles that enter the roundabout on the road are included in the vehicular volumes when analyzing roundabouts with the motorized vehicle methodology.

For bicycle LOS analysis, refer to HCM 7th Edition, Chapter 22, or NCHRP 616, Chapter 7.