| Title |
Development of Quantity Take-off Algorithm for Irregularly Shaped Structures using 3D Object |
| Authors |
하철석(Ha, Cheol-Seok) ; 문소영(Moon, So-Yeong) ; 문현석(Moon, Hyoun-Seok) ; 강인석(Kang, Leen-Seok) |
| DOI |
https://doi.org/10.12652/Ksce.2014.34.2.0655 |
| Keywords |
비정형 구조물;물량산출;불규칙삼각망;서피스모델 Irregularly shaped structures;Quantity take-off;Triangulated irregular network;Surface model |
| Abstract |
This study aims to calculate optimal travel speeds based on analysis of the AVI data collected in the uninterrupted traffic flow, and the results are as follows. Firstly, we looked into the distribution of the sectional travel times of each probe vehicle and compared the difference in the sectional travel speeds of each probe vehicle. As a result, it is shown that outliers should be removed for the distribution of the sectional travel times. Secondly, there were differences among type 1(passenger automobiles) & type 2(automobiles for passengers and freight) and type 4(special automobiles) in the non-congestion section. thus it was revealed that there is a necessity to remove type 4(special automobiles) when calculating the sectional travel speeds. Thirdly, Based on the results of these, the optimal outlier removal procedures were applied to this study. As a result, it showed that the MAPE was between 0.3% and 2.0% and RMSE was between 0.3 and 2.3 which are very similar figures to the actual average traffic speed. Also, the minimum sample size was satisfied at the confidence level of 95%. The result of study is expected to serve as a useful basis for the local government to build the AVI. In the future, it will be necessary to study to integrate AVI data and other data for more accurate traffic information. |