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Leisch Method for Weaving Analysis <br /> Data Input Project Information <br /> Number of Entering Mainline Lanes Nb 3 Project River Islands SEIR <br /> Number of Lanes in Weaving Section N 6 Scenario Cumulative+Approved-AM <br /> Length of Weaving Section (feet) L 2,000 Freeway NB Interstate 5 <br /> On-ramp EB 1-205(3 Lanes) <br /> Total Weaving Section (V) On-ramp to Mainline(W,) Mainline to Off-ramp(W,) Off-ramp Mossdale Road(1 Lane) <br /> Volume(vph)* 8,700 Volume(vph)* 6,400 Volume(vph)* 30 <br /> Truck Percentage 12.0% Truck Percentage 12.0% Truck Percentage 3.0% <br /> PCE for Trucks 1.6 PCE for Trucks 2.0 PCE for Trucks 2.0 <br /> Volume(pcph) 9,362 Volume(pcph) 7,168 Volume(pcph) 31 <br /> Figure <br /> Nb INJ NB Interstate 5 <br /> 4000 F 'E <br /> D— <br /> L <br /> EB 1-205(3 Lanes) Mossdale Road(I lane) <br /> IL Xt <br /> SZ <br /> ------ <br /> CL V _ -____ W1+W2 <br /> W 3000B - <br /> 3 <br /> 0 Capacity Analysis <br /> ao <br /> A 1. Is the weaving section balanced (Y/N)? Y <br /> 3 2000 5 MPH If optional exit lane,then"Y". Otherwise"N". <br /> 3 2. In the chart to the left,which two speed <br /> + curves is the red "x" between? <br /> 3 30 MPH and 35 MPH <br /> 1000OUT OF REALM OF WEAVING <br /> If left of the 30 MPH curve,LOS is F.Select <br /> If below the 55 MPH curve,out of the realm of weaving. <br /> Balanced Section <br /> ---Imbalanced Section 3. Interpolated Weaving Speed (SW,mph) 23.8 <br /> 0E4.Weaving Intensity Factor(k) 3.00 <br /> 0 1000 2000 3000 4000 5000 6000 5.Service Volume(SV,pcph) <br /> L-Length of Weaving Section(feet) SV=(1/N)*[V+(k-1)*min(W1i W2)) 1,571 <br /> 6. Level of Service(LOS) D <br /> The LOS in the chart above refers to the capacity of weaving traffic only;through and ramp to ramp traffic is not included. <br /> *Note: Do not adjust by a Peak Hour Factor(PHF). The methodology incorporates the PHF in the Service Volume tables. <br /> Sources: Completion of Procedures for Analysis and Design of Traffic Weaving Sections,Jack E.Leisch&Associates,September 1983 and <br /> Highway Design Manual,California Department of Transportation,2014 <br /> Fehr&Peers 11/2/2020 <br />