Introduction
The 12-car-platoon experiment (Straight track vs circular track) was carried out on 1 December 2018 in Automobile Experiment Base of Chang ’an University, China. A single lane circular track on the automobile test square was setup using traffic cones. the track width is about 4m and the effective diameter is 80m, and the effective circumference is about 251 m. The experiment used both of the automobile test track and the circular track. See Fig. 1 for the sketch of the experimental tracks.
High-precision difference GPS devices were installed on all vehicles to record their locations and velocities every 0.1 s. The leading car has the cruise control system and moves with constant speed 20 km/h on the automobile test track. The drivers were instructed to drive as in rush hour traffic, and follow the vehicle ahead closely, whenever safety permits. The platoon starts from the middle of straight track 2. After about 9 min, the platoon goes from the middle of straight track 1 into the circular track and moves for another 9 min. Then the experiment stops. The spatiotemporal pattern of speed was shown in Fig. 2.
References:
Zheng Shiteng, Jiang Rui*, Tian Junfang, Li Xiaopeng, Jia Bin*, Gao Ziyou, Yu Shaowei, 2022. A comparison study on the growth pattern of traffic oscillations in car-following experiments. Transportmetrica B, 1(11), 706-724.
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