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A Study on Calculating Relevant Length of Left Turn Storages Using UAV Spatial Images Considering Arrival Distribution Characteristics at Signalized Intersections in Urban Commercial Areas

  • Yang, Jaeho (Dept. of Civil and Environmental Engineering, Incheon National University) ;
  • Kim, Eungcheol (Dept. of Civil and Environmental Engineering, Incheon National University) ;
  • Na, Young-Woo (Dept, Hub-industrial-Academic Cooperation, Incheon National University) ;
  • Choi, Byoung-Gil (Dept. of Civil and Environmental Engineering, Incheon National University)
  • Received : 2018.05.15
  • Accepted : 2018.06.26
  • Published : 2018.06.30

Abstract

Calculating the relevant length of left turn storages in urban intersections is very crucial in road designs. A left turn lane consists of deceleration lanes and left turn storages. In this study, we developed methods for calculating relevant lengths of left turn storages that vary at each intersection using UAV (Unmanned Aerial Vehicle) spatial images. Problems of conventional design techniques are applying the same number of left turn vehicles (N) using Poisson distribution without considering land use types, using a vehicle length that may not be measurable when applying the length of waiting vehicles (S), and using same storage length coefficient (${\alpha}$), 1.5, for every intersections. In order to solve these problems, we estimated the number of left turn vehicles (N) using an empirical distribution, suggested to use headways of vehicles for (S) to calculate the length of waiting vehicles (S) with a help of using UAV spatial images, and defined ranges of storage length coefficient (${\alpha}$) from 1.0 to 1.5 for flexible design. For more convenient design, it is suitable to classify two cases when possible to know and impossible to know about ratio of large trucks among vehicles when planning an intersection. We developed formula for each case to calculate left turn storage lengths of a minimum and a maximum. By applying developed methods and values, more efficient signalized intersection operation can be accomplished.

Keywords

References

  1. AASHTO (2011), A Policy on Geometric Design of Highways and Streets, Transportation Offcials, USA. pp. 1-8.
  2. Do, C. (2005), Transportation Engineering Principles(1) 2nd Edition, Chungmoongak, Seoul, Gangnan-gu. Republic of Korea, pp. 67, 90-91.
  3. Incheon Metropolitan City (2009), City planning complete map, Incheon Metropolitan City, http://www.incheon. go.kr/index.do/ (last date accessed: 10 May 2018).
  4. ITE (2008), Urban Street GEOMETRIC DESIGN HANDBOOK, Institute of Transportation Engineers, Washington, D.C., USA. pp. 199-200.
  5. JRA (2005), Rules of Road Guideline for Commentary and Management, Japan Road Association, Ministry of Land and Transportation, Japan.
  6. Kelton, W.D. and Law, A.M. (2007), Simulation Modeling & Analysys Fourth Edition, McGraw-Hill, Inc., New York, pp. 301-312.
  7. Kim, J. L. (2002), A study on the Capacity Calibration of Left Turn Bay to Signalized Intersection, Ph.D. dissertation, Keimyung University, Daegu, Korea, 144p.
  8. KSCE (2009), Rules of Road Structure and Facility Standards, Korean Society of Civil Engineers, Republic of Korea.
  9. Lee, S. (2009), A Study of Arrival Distribution of Left- Turning Vehicles at Signalized Intersections, Master's thesis, Yonsei University, Seoul, Korea, 60p.
  10. Yekhshatyan, L. and Schnell, T. (2008), Turn Lane Lengths for Various Speed Roads and Evaluation of Determining Criteria, MN/RC 2008-14, MNDOT, Minnesota, pp. 8-14
  11. KoROAD (2015), Traffc accident analysis system(2015), TAAS, http:// taas.koroad.or.kr/ (last date accessed: 10 May 2018), Korea Road Traffc Authority, Republic of Korea.
  12. Fitzpatrick, K., Wooldridge, M. D., & Blaschke, J. D. (2005), Urban Intersection Design Guide, Product 0-4365-P2 Vol. 1, TxDOT, Texas, pp. 4-6.
  13. Qi, Y., Yu, L., Azimi, M., and Guo, L. (2007), Determination of Storage Lengths of Left-Turn Lanes at Signalized Intersections, Transportation Research Record, Vol. 2023, pp. 102-111. https://doi.org/10.3141/2023-11