Figure 2.

Road Network Showing Estimated Travel Speeds The estimated travel speed for each road segment was calculated as follows: • Sealed urban roads – average speed: 30 km/hr • Urban motorway – average speed: 80 km/hr • Non urban, 2 lanes, sealed, straight roads – average speed: 80 km/hr • Non urban, 2 lanes, sealed, bendy roads – average speed: 60 km/hr • Non urban, 1 lane, sealed, straight roads – average speed: 70 km/hr • Non urban, 1 lane, sealed, bendy roads – average speed: 40 km/hr • Metalled straight roads – average speed: 50 km/hr • Metalled bendy roads – average speed: 30 km/hr