研究表明 ,车辆在有边缘线的道路上行驶比在仅有中心线或无标线的道路上行驶时更居中。边缘线能促使驾驶员准确、稳定驾驶 ,提高交通安全度。对驾驶员心率变异系数和操作稳定性测试表明 ,在有边缘线的道路上行驶不易疲劳 Studies have shown that vehicles are more centered on roads with marginal lines than on only centreline or no-mark roads. Edge line can promote the driver accurate and stable driving, improve traffic safety. The driver’s heart rate variability coefficient and operating stability tests show that the road in the edge of the line is not easy to fatigue