吉林高速：第三季度毛利率同比及环比增长的主要原因是高速公路车流量增加，通行费收入相应增加

Core Viewpoint - The company reported an increase in gross margin in the third quarter due to higher traffic volume on highways and corresponding toll revenue growth [2] Group 1 - The company's gross margin increased year-on-year and quarter-on-quarter in the third quarter [2] - The primary reason for the increase in gross margin was the rise in highway traffic volume [2] - The increase in toll revenue contributed significantly to the growth in gross margin [2]