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为研究双车道公路弯坡组合路段行车轨迹特性,以大型车和小型车作为研究对象,选取某山区公路的基本型曲线和S型曲线路段进行了现场试验。采用特征断面法及摄像法,获取了1 700组“前轮-后轮”数据,以轨迹交叉面积和轨迹横向偏移量表征行车轨迹特性,并运用刚体运动理论和博弈论对数据进行分析。分析结果表明:行车轨迹在基本型曲线的ZH~HY断面、HZ断面及S型曲线的HZ_1/ZH_2断面、HZ_2断面高频相交;当曲线半径大于临界值时,基本型曲线和S型曲线在QZ断面弯道外侧的轨迹偏移量最大,内侧的轨迹横向偏移量最小;S型曲线中第二曲线的轨迹偏移量受前后曲线半径组合影响较大,在设计时应尽量使两个方向有一致的行驶轨迹。
In order to study the driving track characteristics of two-lane highway curved-slope combined sections, a large-scale vehicle and a small-sized vehicle were selected as research objects. Field tests were conducted on the basic and S-shaped sections of a mountainous highway. A total of 1700 sets of “front wheel - rear wheel” data were acquired by the characteristic cross section method and the camera method. The trajectory characteristics were characterized by the cross track area and the track lateral offset. The data were processed by using rigid body motion theory and game theory analysis. The results show that the driving trajectory intersects at high frequency of HZ_1 / ZH_2 and HZ_2 of ZH-HY section, HZ section and S-section curve of basic curve; when the curve radius is larger than the critical value, the basic curve and S- QZ cross-section curve outside the largest trajectory offset, the inner side of the track horizontal offset minimum; S-shaped curve of the second curve trajectory offset by the front and rear curve radius combination of greater impact in the design should try to make two The direction of a consistent trajectory.