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“Now, let’s move to a practical example. Here, we are given data about different zones, including the number of trips produced and attracted by each zone. We are also given travel times between zones. Using a gravity model with an impedance term of the form F{ij} = C{ij}^{alpha}, estimate the origin - destination (O-D) trip matrix given the set of O-D travel times (C{ij}) in Table 1, the zonal productions and attractions in Table 2, and alpha = 1.5. Assume that K{ij}=1 for all zones. Do three it