Abstract:In order to ensure the driving safety of passengers and trucks on passenger-cargo separation high-speed dedicated ramps, and to enrich the research results on the length of the acceleration lane of passenger and cargo separation interchange, this paper analyzes the effects of various factors such as traffic volume ,headway distance , vehicle running speed of adjacent lanes in the confluence area, acceleration performance and driver's own quality on the acceleration of the lane length. At the same time, the UMRR chain Kepler radar speedometer is used to observe the actual data in the interchange intersection area. The mathematical statistics method is used to study the driving characteristics of the truck flow in the sub-sector and the confluence area, and finally the acceleration lane is divided into speed-up segment, wait segment, and triangle gradient segment. From the perspective of kinematics theory and traffic flow theory, this paper establishes a calculation model for the acceleration lane length of the passenger-cargo separation and delivery vehicle. Finally, the paper puts forward the characteristic parameters of the truck in the calculation model of the acceleration lane length by measuring the distribution characteristics of the truck circulation parameters in the integrated confluence area. Key words：highway, passenger and cargo separation, interchange, acceleration lane, length

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