Low speed bridges carrying both vehicular and non-vehicular traffic require a combination railing on the outside edge of bridge, adjacent to all pedestrian walkways, if a separator railing is not provided between the roadway and the sidewalk. A separator railing is not required on low-speed bridges, but may be considered on a case-by-case basis. If a separator railing is not provided, a raised pedestrian walkway is required. Refer to Figure B-2 for this situation. If a separator railing is provided, it is recommend to not have a raised pedestrian walkway as this can add significant load to the bridge. Refer to Figure B-3 for separator railing placement.

High speed bridges carrying both vehicular and non-vehicular traffic require a separator railing between all vehicular traffic lanes and pedestrian walkways. The separator railing may be a traffic or combination railing. The outside edges of the bridge require a combination or pedestrian railing adjacent to the pedestrian walkway. If the outside edge of bridge does not have an adjacent pedestrian walkway, a traffic or combination rail is acceptable.

Bridges carrying non-vehicular traffic only must have a combination or pedestrian rail on both outside edges.