An eight - lane freeway (four lanes in each direction) is on rolling terrain and has 11 - ft lanes with a 4 - ft right shoulder. the total ramp density is 1.5 ramps per mile. the directional peak - hour traffic volume is 5400 vehicles with 6% large trucks and 5% buses (no rvs ). the traffic stream consists of regular users and the peak - hour factor is 0.90. it has been decided that large trucks will be banne d from the freeway during the peak hour. what will the freeway’s density and level of service be before and after the ban? assume that the trucks are removed and all other traffic attributes are unchanged.