Currently, there are about 34 registered signalized intersections in Addis Ababa. As mostrnof developing countries the capacity and level of service for these facilities is measuredrnusing manuals adopted from overseas. Among the overseas manuals the Highway CapacityrnManual (HCM 2010) is the most common one. Different vehicle types occupy differentrnspaces on the road, move at different speeds, and start at different accelerations.To adressrnsuch differences HCM(2010) has a conversion to saturation flow rate of signalizedrnintersections in units of passenger cars per hour per lane (pc/h/ln). Currently, a PCE valuernof 2.0 is specified for all through heavy vehicles where no distinction is made betweenrntrucks, recreational vehicles, buses and other vehicles in the calculation of the adjustedrnsaturation flow rate at signalized intersections. rnTraffic and drivers behavior in other countries may be significantly different from thernsituation in Addis Ababa, Ethiopia. Developing local values will minimize the errors wernincur at every step of our capacity analysis due to the use of adopted manual inputrnparameters. In this study the researcher has developed local through traffic passenger carrnequivalents for small busses, large busses, trucks and truck trailers on selected signalizedrnintersections of Addis Ababa with significant number of heavy vehicles. Using dronerntechnology as a data collection tool and deploying the headway ratio method forrndetermining through traffic PCEs the researcher has come up with new local values. Thernstudy showed that the mean local PCEs of Small Busses are 1.49, 1.51, and 1.68 on firstrn(inner), second (middle), and third (outer) lanes respectively. Similarly the mean localrnPCEs of Large Busses are 1.95, 2.20, and 1.99 on first (inner), second (middle), and thirdrn(outer) lanes respectively. Trucks on the other hand have mean local PCE values of 1.62,rn1.56, and 1.44 on first (inner), second (middle), and third (outer) lanes respectively.rnWhereas, Truck Trailers have larger mean local PCE values which are 3.62 and 3.78 onrnsecond (middle) and third (outer) lanes respectively. Moreover, on relatively levelrnapproaches the PCEs are larger than the PCE values on down and upgrades. While, lanernwidth has low effect on PCEs, approach width has significant effect on PCEs. Similarly,rnthe available green time has direct relationship with the PCE values.