7.This paper established the relationship between main lane volume and ramp volumeby utilizing acceptable gap and traffic demand capacity control model of ramp,and the influence of ramp control about the maximum service traffic volume is also analysed。
10.Based on the data of 143 sample trees, the single entry tree volume table and duality entry tree volume table were established by selecting volume equations (V = aDb and V = aDb Hc) and optimized with the modified simplex method.