Pavement intrusion has long been accepted as normal but in recent years pavement intrusion has been eliminated by pushing the pit back so that its outer wall or alternatively the edge of the grate aligns with the lip of the channel. This creates an intrusion into the footpath that poses safety issues for pedestrians. Such designs are called lip-in-line inlets.
This is the subject of the technical bulletin which compares the pedestrian safety of some designs in current use in Queensland.
To read more or download Pedestrian Safety– Technical Bulletin No 2, click on the link below.