[1] Zhao Yi, Zhong Ning, Lu Jian, Li Yunxuan, et al. Analysis of key parameters sensitivity and calibration accuracyof signal timing algorithm [J]. Journal of Southeast University (English Edition), 2017, 33 (3): 316-321. [doi:10.3969/j.issn.1003-7985.2017.03.010]

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Analysis of key parameters sensitivity and calibration accuracyof signal timing algorithm()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

33

Issue:

2017 3

Page:

316-321

Research Field:

Traffic and Transportation Engineering

Publishing date:

2017-09-30

Info

Title:

Analysis of key parameters sensitivity and calibration accuracyof signal timing algorithm

Author(s):

Zhao Yi;  Zhong Ning;  Lu Jian;  Li Yunxuan

School of Transportation, Southeast University, Nanjing 210096, China

Keywords:

lost time;  saturated flow rate;  sensitivity analysis;  signal timing

PACS:

U121

DOI:

10.3969/j.issn.1003-7985.2017.03.010

Abstract:

A theoretical sensitivity analysis of total lost time and saturated flow rate is conducted based on the method proposed in the Highway Capacity Manual(HCM). In addition, the accuracy of the timing calculation algorithm suggested in the HCM is verified using field data from three intersections. It is demonstrated that there is a positive correlation between the estimation error rates of the signal cycle length and the phase lost time. Also, the estimated value of saturated flow rate must meet the specific requirements under different saturated conditions to guarantee the accuracy of the signal cycle length. However, through analysis of field data collected on the discharge headway in three intersections, it is also found that, if the 4th vehicle is set as the initial spot for the stable discharge headway, as is recommended in the HCM, the error of the phase lost time will be over 40% when the line length is over 10 vehicles. Moreover, the calculation error for signal cycle length is not guaranteed to fall within the 15% range when the length of line is over 15 vehicles. It is suggested that, to improve the applicability of the HCM method, a more accurate description of the distributed regularity of the discharge headway is necessary when calibrating key parameters.

References:

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Memo

Memo:

Biographies: Zhao Yi(1989—), male, graduate; Lu Jian(corresponding author), male, doctor, professor, lujian_1972@seu.edu.cn.
Foundation items: Jiangsu Science and Technology Project(No.BY2016076-05), the Scientific Research Foundation of Graduate School of Southeast University, the Fundamental Research Funds for the Central Universities, the Scientific Innovation Research of College Graduates in Jiangsu Province(No. KYLX15_0152).
Citation: Zhao Yi, Zhong Ning, Lu Jian, et al. Analysis of key parameters sensitivity and calibration accuracy of signal timing algorithm[J].Journal of Southeast University(English Edition), 2017, 33(3):316-321.DOI:10.3969/j.issn.1003-7985.2017.03.010.

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