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Project Name: Southeastern Anatolia Regional Transportation and Infrastructure Development Study
Country: TURKEY
Finance Source: World Bank
Partners: DAPTA Engineering Co.Inc., (Turkey) SU-YAPI Engineering and Consulting Co.Inc., (Turkey)
Tags: Turkey, World Bank, Transport, Feasibility Study
Southeastern Anatolia Project (GAP) region encompasses 8 provinces and covers 9.7% (75256 km2) of Turkey’s total surface area. There are 3.07 million ha. agricultural land in the region in which 9.1% of the national population lives. Accepting 1988 as the base year and 2005 as target year, a regional transportation and infrastructure development study which covers development plans and infrastructure projects based on the results of spatial and transportation planning sub-studies have been prepared.
The transportation system in GAP Region consists of highways, rural roads, railways, airports, regional ports and pipeline network. Total length of roads in the region is 35537 km., 5259 km. of which are state highways and the remaining 30298 km. are rural roads. 50 km portion of Adana-Gaziantep Motorway also lies within the region.
Assuming 1988 as the base year, an inventory and assessment of the physical characteristics of the road network was obtained and capacities were determined. Parameters were specified with regard to the socio-economic characteristics of the region.
Origin/destination trip matrices were developed using The General Directorate of Highways’ axle load studies and traffic counts. The freight and passenger trip matrices thus developed were tested with field surveys of regional transport companies. Inventory analysis and field observations were used to specify the transportation network for the base year. The simulation model was calibrated to 1988 database. The main inputs of the model are the data on population, employment, gross domestic product, car ownership, freight and passenger transportation costs, freight and passenger traffic patterns and the physical characteristics and capacities of the existing transportation systems. The outputs of the transportation model are the traffic flows on the main transportation network and the system performance indicators related to these flows.
These outputs for the target year were used to find out the congestion levels and bottlenecks, which would be created by the freight and passenger transportation demand on the main transportation network. Then strategies were developed to relieve the congested sections and several alternative network proposals were specified to satisfy the expected freight and passenger transportation demand in 2005. After model tests of these networks, three of these networks offering various investment options were selected on economic criteria.
These alternatives were evaluated according to net present value, economic internal rate of return, net present value/discounted investment cost and the most economically sound one was chosen.
As a result of these studies, an investment program was proposed.
