TRAFFIX™ can be used to perform impact fee analyses and establish "nexus" requirements since it actually traces and documents the traffic generated by a new development through each critical intersection on the street network. The user enters the total cost of the improvements at each intersection. TRAFFIX™ then calculates the relative share of the intersection improvement costs attributable to each development project. The fees are based upon the estimated number of trips that the development sends through the intersection. The proportionate costs are added up by TRAFFIX™ to obtain a total traffic impact fee for each proposed development, resulting in a fee schedule for each new development project based upon its actual traffic impacts.