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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+Proposed (NVL)-AM <br /> Length of Weaving Section (feet) L 1,450 Freeway SB Interstate 5 <br /> On-ramp WB SR 120(3 Lanes) <br /> Total Weaving Section (V) On-ramp to Mainline(W,) Mainline to Off-ramp(W,) Off-ramp Manthey Road (1 Lane) <br /> Volume(vph)* 10,053 Volume(vph)* 3,647 Volume(vph)* 156 <br /> Truck Percentage 12.0% Truck Percentage 12.0% Truck Percentage 3.0% <br /> PCE for Trucks 1.4 PCE for Trucks 2.0 PCE for Trucks 2.0 <br /> Volume(pcph) 10,553 Volume(pcph) 4,085 Volume(pcph) 161 <br /> Figure <br /> Nb N SB Interstate 5 <br /> 4000 F 'E <br /> D � L <br /> WB SR 120(3 Lanes) Manthey Road(1 Lane) <br /> L <br /> G- _ <br /> V J - - _ r_=__ } W14 2 <br /> W3000 B 11 - <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 S:�Stect, n <br /> ion <br /> 3. Interpolated Weaving Speed (SW,mph) 29.1 <br /> 0 -9 4.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(W,,W2)) 1,812 <br /> 6. Level of Service(LOS) E <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 11/22/2020 <br />