Research Article

Driver Source-Based Traffic Control Approach for Mitigating Congestion in Freeway Bottlenecks

Figure 3

Colour and size of each circle illustrate the traffic flow contribution of each on-ramp to the freeway bottleneck of (a) Beijing-Hong Kong-Macao Expressway and (b) Changsha- Zhangjiajie Expressway.
(a)
(b)