Development Of Models Of Interrupted Traffic Flow Conditions Of Addis Ababa From A Study Of An Urban Multi-lane Highway

Congestion problems in metropolitan areas are not addressed only throughrninfrastructure measures. Capital cities of developing countries like Ethiopia arernexisting witnesses in supporting such premises. Thus, in assisting the collective effortrnin alleviating congestion problems, investigation of contributing factors that havernbeen taking role in the interruptions of smooth traffic flow states have got duernattention of this research. Thus, several scholars who have researched in the arearnrevealed that the interruptions are of two pair of types: fixed & non-fixed on facility,rnand recurrent & non-recurrent while the contributing factors are behavioral issuesrnassociated with pedestrian movement characteristics & drivers’ decision behaviors.rnMoreover, among the seven types of modeling of traffic flow states and transportrnengineering parameters, this research adopted Strategic/Statistical Modeling inrncapturing recurrent as well as both fixed and non-fixed interruptions on facilities.rnAnd in addition to the modeling and condition types selected, this research took arnmulti-characteristics urban multi-lane highway with considerable variation in traffic,rnpedestrian characteristics and drivers behavior. Then, validation studies werernconducted on two other random locations in Addis Ababa and the study outcomesrnwere recommended with few limitations.rnFinally, the results were interpreted and the key research findings were presentedrnin three types. That is: statistical models, quantitatively captured behavioralrnparameters and inter-relationships among several captured parameters. And uponrnrecommending for future use in research and practice, the 23 types of results werernevident to be replicable to other analogous locations in Addis Ababa while other 3rnare strongly stressed by the researcher that they shall remain to the study area.rnThey are: pedestrian crossing speeds, pedestrian crossing patterns and thernrelationship between demand flow rate and saturation flow rate.rnKEY WORDS: CHARACTERISTICS, BEHAVIOR, MODEL, FLOW, STATE, INTERRUPTION,rnDECISION, DRIVER, PEDESTRIAN, TRAFFIC, STABLE AND UNSTABLE

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