The design speed is the 85th percentile approach operating speed. The default value for this is the speed limit. The minimum values in this table are based on a general minimum reaction time of two seconds. Table 18: Corrections to stopping sight distances due to grade Corrections due to 8% 6% 4% grade gradient gradient gradient gradient gradient gradient gradient 40 km/h 5m 3m 2m 1m 50 km/h 8 5 3 2 60 km/h 11 8 5 2 7 70 km/h 15 11 3 80 km/h 20 14 9 4 90 km/h 25 18 11 5 100 km/h 31 22 14 6 110 km/h 38 26 17 8 Note This table sets out the distance (m) to be added or subtracted from the stopping sight distances in Table 17 to correct for gradient. Sightlines for road/rail crossings Sites subject to sightlines for level crossings are identified on the planning maps by the Infrastructure overlay Level crossings with sightline controls. Level crossings with sightline controls are controlled by Stop or Give Way signs, rather than by alarms and/or barrier arms. If alarms and/or barrier arms are subsequently installed at these locations, the rules below cease to apply. Approach sight triangles (refer to Figure 11) on sites adjacent to the level crossings with sightline controls, buildings or structures cannot be located within the approach sight triangles identified on the planning maps.
The design speed is the 85th percentile approach operating speed. The default value for this is the speed limit. The minimum values in this table are based on a general minimum reaction time of two seconds. Table 18: Corrections to stopping sight distances due to grade Corrections due to grade gradient gradient gradient gradient 4% gradient 6% gradient 8% gradient 40 km/h 5m 3m 2m 1m 50 km/h 8 5 3 2 60 km/h 11 8 5 2 70 km/h 15 11 7 3 80 km/h 20 14 9 4 90 km/h 25 18 11 5 100 km/h 31 22 14 6 110 km/h 38 26 17 8 Note This table sets out the distance (m) to be added or subtracted from the stopping sight distances in Table 17 to correct for gradient. Sightlines for road/rail crossings Sites subject to sightlines for level crossings are identified on the planning maps by the Infrastructure overlay Level crossings with sightline controls. Level crossings with sightline controls are controlled by Stop or Give Way signs, rather than by alarms and/or barrier arms. If alarms and/or barrier arms are subsequently installed at these locations, the rules below cease to apply. Approach sight triangles (refer to Figure 11) on sites adjacent to the level crossings with sightline controls, buildings or structures cannot be located within the approach sight triangles identified on the planning maps.
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