When there are three or four values for distance between cities which to consider? I am making a 10*10 distance matrix which includes distances(only via road) from one city to another. When I search for the distance between two cities, we get, let's say, 100,136,152 for those two cities. To include in the matrix which value I should consider its mean, median, mode, or other, what will be the justification for using that value?
I would be thankful if you could answer my query.

It depends on your context. If you are planning to travel between points A and B, you typically have a huge number of possible routes to use (some of which will only differ by a tiny bit). You typically want the shortest one in terms of either distance, or travel time. Potentially with some additional conditions, like avoiding toll roads. Thinking about what you want to use your distance matrix for should help you understand which is the best choice to make.
