Hi,
Thanks again for your reply, I am trying to make a work around for the fact that I cannot find any traffic light data for the south east of England.
Therefore, where there is a change in road type for example motorway -> minor road; it could be assumed that there would be traffic lights or a similar restriction which would add to the overall cost of the route as it is traversed.
What I might have to do is just add to the cost of the roads where there is roundabouts and leave out traffic lights (and similar road features).
I did have a look at the turn feature class tutorial earlier, but I discounted it as I have every road in the south east of England to model and to calculate the cost of each turn for over a million junctions would be just too greater task.
If there was just a way to include some form of global variable that I could write to, then I could check the value in the field evaluator as each road is calculated.
Thanks again,
Liam.