at grade intersection造句

• Finally , this dissertation discusses the application of traffic control method in improving measures of urban transportation environment . the illustration example indicates that , by reasonably limiting the speed of urban vehicles and alternating the signals at grade intersection , the total emission of motor vehicles can be reduced while assuring normal transportation operation
  本文最后讨论交通管理方法在城市交通环境改善方面的作用,通过示例分析,合理地进行车辆限速和对相位差合理微调可以在保证交通正常运行的条件下减少机动车污染物排放量。