TY  - JOUR
PY  - 2023//
TI  - Safety-critical traffic control by connected automated vehicles
JO  - Transportation research part C: emerging technologies
A1  - Zhao, Chenguang
A1  - Yu, Huan
A1  - Molnar, Tamas G.
SP  - e104230
EP  - e104230
VL  - 154
IS  - 
N2  - Connected automated vehicles (CAVs) have shown great potential in improving traffic throughput and stability. Although various longitudinal control strategies have been developed for CAVs to achieve string stability in mixed-autonomy traffic systems, the potential impact of these controllers on safety has not yet been fully addressed. This paper proposes safety-critical traffic control (STC) by CAVs--a strategy that allows a CAV to maintain safety relative to both the preceding vehicle and the following human-driven vehicles (HVs). Specifically, we utilize control barrier functions (CBFs) to impart collision-free behavior with formal safety guarantees to the closed-loop system. The safety of both the CAV and HVs is incorporated into the framework through a quadratic program-based controller that minimizes deviation from a nominal stabilizing traffic controller subject to CBF-based safety constraints. Considering that some state information of the following HVs may be unavailable to the CAV, we employ state observer-based CBFs for STC. Finally, we conduct extensive numerical simulations - that include vehicle trajectories from real data - to demonstrate the efficacy of the proposed approach in achieving provably safe traffic.<p />  <p>Language: en</p>
LA  - en
SN  - 0968-090X
UR  - http://dx.doi.org/10.1016/j.trc.2023.104230
ID  - ref1
ER  -