Laserfiche WebLink
Leisch Method for Weaving Analysis <br /> Data Input Project Information <br /> Number of Entering Mainline Lanes Nb 5 Project River Islands SEIR <br /> Number of Lanes in Weaving Section N 6 Scenario Cumulative+Proposed-PM <br /> Length of Weaving Section (feet) L 3,200 Freeway SB Interstate 5 <br /> On-ramp Manthey Road (1 Lane) <br /> Total Weaving Section(V) On-ramp to Mainline(W,) Mainline to Off-ramp(W,) Off-ramp WB I-205(3 Lanes) <br /> Volume(vph)* 9,553 Volume(vph)* 20 Volume(vph)* 6,965 <br /> Truck Percentage 12.0% Truck Percentage 3.0% Truck Percentage 12.0% <br /> PCE for Trucks 1.5 PCE for Trucks 2.0 PCE for Trucks 2.0 <br /> Volume(pcph) 10,113 Volume(pcph) 21 Volume(pcph) 7,801 <br /> Figure <br /> Nb N SB Interstate 5 <br /> � i <br /> F ' <br /> 4000 ,' E <br /> D 4 L <br /> nn­mey goad(i La"e) WB I-205(3 Lanes) <br /> i C <br /> O_ <br /> 3000 ' ---- <br /> v B <br /> E ' <br /> c Capacity Analysis <br /> > <br /> to <br /> A 1. Is the weaving section balanced (Y/N)? Y <br /> Q) 2000 ,' 5S MPH If optional exit lane,then"Y". Otherwise"N". <br /> 2. In the chart to the left,which two speed <br /> 3 <br /> + curves is the red "x" between? <br /> 30 MPH and 35 MPH <br /> 1000 1 OUT OF REALM OF WEAVING <br /> ' If left of the 30 MPH curve,LOS is F.Select <br /> r <br /> i <br /> ' i '' If below the 55 MPH curve,out of the realm of weaving. <br /> ; . . <br /> —Balanced Section <br /> ---Imbalanced Section 3. Interpolated Weaving Speed(SW, mph) 29.4 <br /> 0 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,,WZ)] 1,692 <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 1/22/2021 <br />