An interactive toy from the analysis. It shows the part most people get wrong: the safety credit is mostly already in your postcode. The only thing an explicit infrastructure model adds is speed, and you can watch that edge decay below.
Severity relativities are point estimates from a Toronto open-data proof-of-concept (protected ~0.83 is the robust headline; painted is noisier). The "already in your postcode" share grows with time because territorial rating absorbs realised loss experience: the cross-sectional infrastructure signal, net of postcode, was ~0 in the data. Illustrative only; not an insurance quote.