Evaluation on the Effect of Parking Problems on Transportation System in Addis Ababa: Case Study in Addis Ketema Sub- City

Abstract

Parking is the act of stopping and disengaging a vehicle and leaving it unoccupied. These days, parking is a major challenge in different sub cities of Addis Ababa. Among Addis Ababa sub-cities, Addis ketema sub-city where, public circulation is one of the most obvious problems, and parking seems to be an overlooked element of transportation development. Sites of activities such as market centers, shops, churches, mosques, offices, schools, and similar places often generate huge parking demands, and increase the parking problems in the sub-city. Thus, the main objective of this study is to evaluate the effect of parking problems in Addis Ababa, Addis ketema sub-city. The study also seek to identify the effectiveness of parking utilization to enable the parking spaces to accommodate a large number of vehicles and the effect of on-street parking on travel time. The study used the License plate method of parking survey for both on street and offstreet parking surveys. These have been done for two days, one from the weekday Friday and one from the weekend Saturday from 9:00AM-5:00PM. The existing parking conditions were analyzed using Ms-excel. The relationships of utilized parking spaces to the available parking capacity were developed by SPSS software. The effects of on-street parking on travel time have been also analyzed using vissim simulation modeling software in two different situations one by considering roadside parking and the other by removing roadside parking. Based on the findings the average parking occupancy of off-street and on-street parking was 90% and 80% respectively. However, off-street parking turnover is lower than onstreet parking. This means the average parking duration of off-street parking were about 4hr per vehicle while the average parking duration of on-street parking were 2hr per vehicle. Using linear regression analysis, the relationship developed between utilized parking spaces and the available parking capacity of off-street and on-street parking show that parking spaces have been nearly full utilization of available capacity. The total average segment delay of total duration along the road segment due to roadside parking P4, P5 and P6 were 7.29, 12.01 and 25.95 seconds per vehicle respectively. Lastly, the intervention through fare rate and time-restriction parking will improve the parking turnover and roadside parking would be shifted to off-street parking to improve the transportation system of the sub-city. Formulating parking control enforcement also to access the space, provide a clearway allowing the parking lane to be used as a through lane where peak hour traffic volumes exceed the available lane capacity.