Traffic entropy characteristics at on-ramp junctions on urban freeway;

It had been approved that the headways for vehicles following the Weibull distribution function at on-ramp junctions in urban freeway system.

Robust Optimal Control Strategy of the On-ramp of Freeways;

Research on Control Strategy of Expressway on-ramp;

Calculating model for the capacity of the junction at on-ramps;

In order to work out the merging regularity of the on ramp freeway junction, video tape recorder and Autoscope 2004 image sensing system are used to investigate merging characteristics on freeway interchanges in many provinces and cities such as Jiangsu, Shanxi, Hebei, Beijing, Tianjin and Guangdong.

This paper presents a new design philosophy on acceleration lane that the traffic volumes on main line of expressway and on ramp are considered in the computation of the acceleration lane length.

This paper has solved the control problem of flow/density in freeways, designed fuzzy controller in exact fuzzy way and provided new method for on ramp to be suitable for real time control.

The traffic momentum differential equation and Euler s equation for the ramp junction is founded by means of differential calculus in this paper,the traffic momentum differential coupled equation is solved by characteristic curve method,two groups of characteristic curves and corresponding related equation in high speed(low density)states and low speed(high density)states are presented.

On-ramp junction is choke point of expressway,and it has import and realistic significance for building and managing expressway to study its capacity.