Further Advice Response 21-8-24 Attachment 2 - Site Distance Correspondence

Safe Intersection Sight Distance (SISD)

SISD is the distance at which a driver on the major road can see another vehicle at the intersection or access
moving into a collision position, recognise the collision situation developing and stop before colliding with the
other vehicle. Figure 1 below reproduced from the Austroads Guide to Road Design Part 4A: Unsignalised and
Signalised Intersections (AGRD04A-23) illustrates the concept of SISD.

                            Figure 1 - Safe Intersection Sight Distance (AGRD04A-23)




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