How the two fit together
The detour tool answers what happens if this road closes. The programme builder
answers what should we spend, where, and what does it avoid. They meet at the
NRPBC risk score: its detour issues input comes straight out of the detour tool,
and its consequence rating is what separates roads that otherwise look alike on
spend alone. Roads the detour tool found to be sole access — Algidus, Craigieburn,
Harper, High Peak — are already pre-set in the programme builder.
Before you rely on the numbers
Treatment rates are indicative. Unit costs and mechanism effectiveness come from a
workbook tab labelled "confirm with Council/contractor". At $40k/km the Algidus swale
package returns a BCR of 0.84; at $25k/km it returns 1.35. The Contract Rate
sheet in Historical Spend from RAMM.xlsx holds 288 priced items from the 1420
maintenance contract — that is where the real rates are.
NRPBC band thresholds are an interpretation. The National Resilience PBC publishes
the likelihood and consequence matrices but not the cut points between rating bands.
Ours are stated on the programme builder's Inputs page. Confirm them before anything
goes into a submission.
Desktop screening only. No site visits, no new hazard modelling, no design.
Travel times are modelled from road class and surface, not observed. Per-segment
emergency works figures are RAMM dispatch claim amounts — they show where damage
concentrated, not the full cost of the events.