Traffic assignment without bias. Paper presented at the 51st Annual Meeting of the Highway Research Board HRB, Washington, D.C., January 1972.

Traffic assignment procedures based on shortest time path tend to over assign traffic to high-speed facilities. Two assignment formulas were developed, taken as parameters in the assignment process, eliminate the overall bias. The exponential factor, discussed here, is based on a combination of link distance and speed raised to an exponential power.