ANALYSIS OF THE EFFECT OF SCHOOL SAFETY ZONE (ZOSS) ON-ROAD PERFORMANCE (Case Study of Veteran Street SDN 1,2,6 Dirgahayu Pulau Laut Utara Sub-district Kotabaru Regency)

Abstract

The ZoSS that was reviewed was the ZoSS on Jl. Veteran in front of SDN 1,2,6 Dirgahayu, Kotabaru Regency. ZoSS itself can affect traffic conditions, ranging from volume, speed, and density. This study aimed to determine the effect of the presence of ZoSS and the absence of ZoSS and to determine the Traffic Performance on Jl. Veteran which has a ZoSS area. The research conducted was a field survey to find data on volume, speed, and side obstacles. The survey was taken with three conditions, namely the condition of the influence of ZoSS, before the influence of ZoSS, and after ZoSS. Calculations using the Greenshield Model Analysis method, Greenberg Model, Underwood Model, and Bell Model, to determine the Capacity of the road section supported by daily Traffic Volume Data, and Vehicle Speed to get the density of the road section. From the modeling analysis, the Greenshield model was selected. From the calculation results, in the area before ZoSS to the ZoSS effect area, the maximum volume decreased by 17.67%, the average speed decreased by 0.18%, and the maximum density, decreased by 17.52%. In the area after ZoSS, the maximum volume increased by 8.78%, the average speed increased by 4.98%, and the maximum density increased by 3.62%. ITP values were obtained with V/C comparisons during ZoSS operating hours, in the area before ZoSS influence, DS 0.90 was obtained, the area affected by ZoSS was DS 0.97, and the area after ZoSS influence was DS 0.86. The same ITP value was obtained in all three areas, namely, E, which means that the traffic volume is close to/at capacity, the flow is unstable, and the speed is stopped.

Keywords: Safe School Zone (ZoSS), Road Performance, Greenshield Model, Capacity Analysis