Study of set condition of pedestrian overpass on urban road sections

Based on the computational theory of motorway capacity and pedestrian crossing capacity under the condition of non-signal control,the corresponding calculation model under the condition of signal control is proposed.Meanwhile,the set condition that pedestrian crossing transforms from non-signal control mode to signal control mode is analyzed by using probability theory and gap acceptance theory.Then,from the perspectives of the motorway capacity and pedestrian crossing capacity,definite critical condition of the transformation from pedestrian crossing to pedestrian overpass on urban road sections is proposed.The method is shown to be feasible through a case study,which can be applied in pedestrian overpass planning on urban road sections.