Find: LOS and speed within the ramp influence area and the outer freeway lanes (one-ramp is followed by off-ramp)
Given:
6-lane freeway
One-lane on-ramp with FFS of 35 mph
On-lane off-ramp with FFS of 30 mph
Distance between ramps = 1,800 ft
Acceleration lane = 250 ft
Deceleration lane = 250 ft
Rolling terrain
8% trucks, 5% RVs on freeway
5% trucks, 2% RVs on ramps
Freeway flow rate (upstream of on-ramp) = 4,200 veh/hr
On-ramp flow rate = 700 veh/hr
Off-ramp flow rate = 500 veh/hr
PHF = 0.98
Commuter traffic