The Influence of Jogjakarta Outer Ring Road Development Plan on the National Roads in DIY

Abstract

The development of Jogja Outer Ring Road (JORR) has been issued by the government as one of possible alternatives to deal with traffic jams. The ring road has occupied the existing road with an extension of 7 meters to seize 14 meters. In the future, ring road will pass through 22 districts in 3 regencies. In this study, there were 4 main streets, i.e. Solo-Jogja street, Kaliurang St, Magelang St, and Palagan Tentara Pelajar St, set as the objects of comparison to the existence of JORR, which was analyzed three probabilities, namely 1) without JORR, 2) JORR of government route, and 3) actualized JORR with alternative route. As a result, V/C ratio of four surround roads with JORR were better. Additionally, with alternate JORR the result was much better until 5 more times. In the opposite, there were 3 roads surrounds that had more performance than the existence of JORR. Based on this study, the V/C ratio of Solo-Jogja St in front of the eastern part of Kalasan district as the north part, it decreased for about 8.79% if JORR was actualized and 60.78% if JORR was actualized with alternate road. At the western part, there was increased performance of 6.55% if JORR was actualized and 49.42% if JORR was actualized with alternate road. At southern part, there was raised performance around 16.25% if JORR was actualized and 5.27% if JORR was actualized with alternate road.