A NOTE ON TRAFFIC DELAY FORMULAS

Abstract

This paper discusses an earlier paper by R. Ackelik, 'The Highway Capacity Manual Delay Formula for Signalized Intersections,' published in ITE Journal March 1988, and which compared the delay formula for signalized intersections contained in the Highway Capacity Manual (HCM) with the Australian and Canadian formulas, and presented a generalized formula that embraces them all. This present paper discusses work at the Transport Road Research Laboratory, England, by Kimber and Hollis. A number of simplifying assumptions implicit in the Akcelik paper are also disscussed. It is noted that expressions disscussed by Akcelik are a subset of a more general family of models, and a number of additional factors can be taken into account.