Hi Andy, re your supplementary question I'd recommend having a look at Assetic Predictor. I've used it for some basic road modelling but you can take it to any level of complexity you want. In a nutshell you can define degradation profiles that simulate change in condition over time, and the treatments (+ costs) that you would apply to reverse degradation. You then set the rules for when the treatments will be applied (condition based and situation based eg Condition 3 on a Asphalt pavement on an arterial road). The system can then allocate a budget to the network and model condition over say a 20 year period.
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