A segment of four-lane freeway (two lanes in each direction) has a 3% upgrade that is 450 m long followed by a 300-m 4% upgrade. It has 3.6-m lanes and 0.9-m shoulders. The directional hourly traffic flow is 2000 vehicles with 5% large trucks and buses (no recreational vehicles). The total ramp density for this freeway segment is 1.45 ramps per kilometer. If the peak-hour factor is 0.90 and all of the drivers are regular users, what is the level of service of this compound-grade freeway segment?