| Title |
Study on Entering Improvement of Acceleration Lane onto an Expressway Using a Traffic Simulation |
| Authors |
노희찬(Roh, Hee-Chan) ; 김낙석(Kim, Nak-seok) |
| DOI |
https://doi.org/10.12652/Ksce.2022.42.3.0409 |
| Keywords |
연결로; 가속차로; 교통흐름; VISSIM Ramp; Acceleration lane; Traffic flow; VISSIM |
| Abstract |
The length of the acceleration lane in the area of entrance terminals is calculated based on 13 PS/ton horsepower of a cargo truckin Korea, so it is generally overestimated compared with the capacity of most vehicles traveling on an entrance ramp. Most drivers have, therefore, an indiscreet tendency to enter the main lane in all sections of an acceleration lane, which affects the traffic flow of the main lane. Because of this tendency, measures are required to minimize the impact on traffic flow of the main lane. The operating speed, rate of entrance, and traffic volume for each vehicle were investigated at the entrance terminals of the interchanges (ICs) of Yangji IC, Suseok IC, Yongin IC, and Osan IC, and the level of improvement in traffic flow was analyzed via VISSIM simulation. From the VISSIM simulation analysis, 74.0 % of the total vehicles traveled over the specified speed from the nose point where drivers would be able to recognize the traffic condition of the main carriageway, or the point at which there is a simplification of the curve section. In addition, 88.6 % of the vehicles entered the main carriageway up to 0.8 points compared with the entire length of the acceleration lane. It was subsequently found that an improvement of average speed in the main carriageway and at the entrance ramp can be achieved from 60.1 km/h to 68.5 km/h by intentionally limiting the entrance point onto the main carriageway up to 0.265 points of the entrance ramp. |