Hello,

I'm not sure where to ask this, and I looked around but couldn't find an answer. Here's the question:

I would like to perform a small evacuation 'analysis' for a subdivision. The idea is to figure out how long it would take to clear out the subdivision and what road intersections would be potential 'choke' points.

I thought I could do this with Network Analyst (ArcView license level). But I installed a trail version (thank goodness I didn't buy it) and it appears that I can not do the sort of analysis that I want. I can find a route, service area, etc., but not specify 11k+ points (homes) with one car each that would drive to two points at the edge of the road network.

So, what do I need to do the job? Do I need an ArcINFO license and use geometric networks?

Thanks in advance,

Esther

I'm not sure where to ask this, and I looked around but couldn't find an answer. Here's the question:

I would like to perform a small evacuation 'analysis' for a subdivision. The idea is to figure out how long it would take to clear out the subdivision and what road intersections would be potential 'choke' points.

I thought I could do this with Network Analyst (ArcView license level). But I installed a trail version (thank goodness I didn't buy it) and it appears that I can not do the sort of analysis that I want. I can find a route, service area, etc., but not specify 11k+ points (homes) with one car each that would drive to two points at the edge of the road network.

So, what do I need to do the job? Do I need an ArcINFO license and use geometric networks?

Thanks in advance,

Esther

You can perform all of the analyses supported by Network Analyst using ArcView license. For your case, use the OD Cost Matrix solver. Load the 11K home locations as origins, two edge points as destinations and solve. The resulting lines layer will contain the shortest distance (or time based on the impedance) from each house to both the edge points. The Destination Rank field will give you an idea if the given edge point was closest. If you need the total distance as well as time, then you can specify one or more attributes on the Accumulation tab of the layer properties for your OD layer. That way the resulting lines will have shortest distance as well as time.

Hope this helps

Deelesh