Table 2 Speed limits assigned to roads in the network-based model. D refers to floodwater depth, whilst V refers to floodwater velocity
Road type | Travel speed (km hr− 1) in flood conditions: | ||||
|---|---|---|---|---|---|
Dry and unflooded | Wet | Flooded | Deeply flooded | Impassably flooded | |
D = 0 m V = 0 m s − 1 | D = < 0.01 m | 0.1 m > D > 0.01 m | 0.5 m > D > 0.1 m | D = > 0.5 m OR V = > 1.0 m s − 1 | |
Primary | 80 | 26.7 | 8 | 5 | 0 |
Secondary | 50 | 16.7 | 8 | 5 | 0 |
Track | 30 | 10 | 8 | 5 | 0 |
Elevated highway | 120 | n/a | n/a | n/a | n/a |
Watercrossing | 15 | 5 | 8 | 5 | 0 |