关键词: 交通工程；通行能力；智能辅助驾驶车队；基本图模型；混合交通流

Abstract: Aiming at the traffic flow mixed with regular manual driving vehicles and intelligent assistant driving vehicle platoons, the characteristics of traffic capacity were analyzed. A probabilistic analytical expression of traffic flow mixed with intelligent assistant driving vehicles platoons was built. Meanwhile, the intelligent driver model and full velocity difference model were applied respectively as the car-following models of intelligent assistant driving vehicles and manual driving vehicles. Then, the fundamental diagram model of the mixed traffic flow was deprived. Based on this, the traffic capacity of mixed flow was analyzed. Finally, for the intelligent assistant driving vehicle market rate p, the maximum fleet size S of intelligent assistant driving fleet and the intelligent assistant driving level e, the parameter sensitivity analysis was carried out respectively. The research results show that the traffic capacity of the mixed flow improves with the increase of p. When p≤0.2, the traffic capacity improvement is not significant; when p≥0.4, the traffic capacity improves significantly. With the increase of p, the optimal value of the maximum platoon size S is also different. When p≤0.4, the optimal value of S is 2; when p≥0.6, the optimal value of S is 4. The effect of e on traffic capacity is greatly restricted by p. When p≤0.2, e has no significant effect on the improvement of traffic capacity; when p≥0.4, e has a significant impact on traffic capacity.

Key words: traffic engineering; traffic capacity; intelligent assistant driving vehicle platoons; fundamental diagram model; mixed traffic flow