|Table of Contents|

Evaluation based on ITC of rearend collision safety of automated truck platoons(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2019年05期
Page:
97-105
Research Field:
交通工程
Publishing date:

Info

Title:
Evaluation based on ITC of rearend collision safety of automated truck platoons
Author(s):
CHEN Feng;  TU Zhimin;  CHEN Tao
(1. Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 201804, China; 2. Key Laboratory for Automotive Transportation Safety Technology of the Ministry of Transport, Chang’an University, Xi’an 710064, Shaanxi, China)
Keywords:
traffic engineering;  risk assessment;  timetocollision;  truck platoon;  rearend conflict;  intelligent driver model
PACS:
-
DOI:
-
Abstract:
To control collision risk and reduce the occurrence of rearend collision accidents during the largescale application of truck platoons, the traditional traffic conflict evaluation method was improved, and the safety of the selfdriving truck platoons was analyzed and evaluated. Considering the road surface resistance and coordinated control, the intelligent driver model (IDM) was improved, and two carfollowing models suitable for selfdriving truck were established, the carfollowing model considering the road resistance (IDM+) and the carfollowing model with cooperative adaptive cruise control (CACC). The carfollowing model was then applied as the basis for platoon control. Regardless of the individual types of vehicle control, the MATLAB numerical simulation experiment was used to obtain the timevarying curve of the platoons and the state of the carfollowing model. Two kinds of collisiontime functions, timetocollision (TTC) and the inverse timetocollision (ITC) were used as evaluation indicators to obtain timevarying curves of safety indicators, and the advantages and disadvantages of the two indicators were compared. Based on the numerical simulation experimental results, and the ITC safety discriminant criteria, the qualitative analysis of truck racing followup safety was performed. Platoons of three trucks under the IDM+ and CACC carfollowing models were included in simulation experiments. The results show that CACC can improve the stability of the truck racing followup process and reduce the risk of rearend collision. Also, with the speed difference between the front and rear vehicles increasing, the risk of vehicle rearend collision tends to increase. There is an approximate linear relationship between the ITC and the speed difference between the front and rear vehicles. 〖JP2〗The results of the study can be used to evaluate the safety of truck platoons and provide risk warnings during planning of truck platoons and the operation process, to prevent the occurrence of rearend conflict accidents. 3 tabs, 10 figs, 30 refs.

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Last Update: 2019-10-16