Results
Our dataset consisted of 50,245 scene transports occurring in 2008. A total of 48,248 (96.0%) of scene addresses were successfully geocoded by Google maps without any manual editing. An additional 1997 4.0% were geocoded manually. Charts for 1843 transports were excluded for actual transport times shorter than estimated. Charts for 94 transports were excluded for transport times > 60 minutes. After exclusions, 24,133 transports were used to derive our model and 24,175 for validation. The two datasets showed no significant differences (Table 1). Figure 1 shows the distribution of actual