Consider a study area with three zones. The following data is provided

The number of trip productions and attractions per zone $($Table $12\mathrm{.}9).$

The average travel times between zones $($Table $12\mathrm{.}10).$

Calibrated $F$ values for each travel time increment $($Table $12\mathrm{.}11).$

Assume the same $K$ value for all zones. Note that Zone I has a larger intrazonal travel time due to geographical characteristics and limited access, representing conditions in a congested downtown area. Determine the number of trips between each zone using the gravity model using one iteration.

Table $12\mathrm{.}9$ Trip Productions and Attractions for a Three$-$Zone Study Area

$\backslash$table$[[$Zone$,1,2,3,$Tonel$],[$Trip productions,$140,330,280,750$