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Abstract:
Enabling large-scale deployment of automated vehicles (AVs) in the near future requires answering the question firstly: whether AVs could safely adapt to as-built road geometry? This study aims to examine the feasibility of current spiral curve design controls for LiDAR-based AVs (LAVs) from the perspective of the available sight distance (ASD). A series of tests featuring the design speed (V-d), lengths of tangent (L-T) and spiral (L-S), circular curve radii (R), and point thresholds for detection (N-T) were simulated in PreScan/MATLAB/Simulink co-simulation platform. The ASDs affected by those parameters' combined effects were analyzed and compared with required stopping sight distances (RSDs) of human-driven vehicles (HVs) and level 3 to 5 (L3-L5) LAVs followed by proposing the ASD-oriented safe speeds and the corresponding speed limits. The results indicate that: (1) the combination of the tangent-spiral curve-circular curve causes a shorter ASD than that without the spiral curve; (2) a longer spiral curve causes a shorter ASD; and (3) only a low-type combination of R, L-S, V-d conditions is feasible for L3 LAVs while L4 or L5 LAVs have difficulties in dealing with high-type conditions. These findings help understand the ASD for AVs and provide safety-critical speed references for administrators.
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IET INTELLIGENT TRANSPORT SYSTEMS
ISSN: 1751-956X
Year: 2022
Issue: 5
Volume: 17
Page: 848-866
2 . 7
JCR@2022
2 . 3 0 0
JCR@2023
ESI Discipline: ENGINEERING;
ESI HC Threshold:66
JCR Journal Grade:3
CAS Journal Grade:4
Cited Count:
WoS CC Cited Count: 2
SCOPUS Cited Count: 1
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
Affiliated Colleges: