CALIFORNIA | FLORIDA | TEXAS
Corporate Office 4305 Hacienda Drive, Suite 550, Pleasanton, CA 94588 925.463.0611 www.TJKM.com 1 TECHNICAL MEMORANDUM
Date: September 22, 2023
To: Brad Taylor, PE, TE City of Lathrop
CC: Sean Asmus Hodgdon Group Realty, Inc.
From: Renee Reavis, EIT
Steven Matthew Dauterman, PTOE, RSP1
TJKM
TJKM
Subject: Ashely Furniture – Lathrop Road Supplemental Analysis The purpose of this memorandum is to provide a brief supplemental analysis of the Lathrop Road & I-5 Ramp intersections. The Ashley Furniture Traffic Impact Analysis Report (TIA), dated August 9, 2023, utilized estimated 2022 Baseline conditions as the basis for identifying potential improvement measures to address increases in vehicular delay above City thresholds in conjunction with additional trips generated by the Ashley Furniture project. The 2022 Baseline Conditions were based on 2018 traffic volumes plus estimated background growth by the year 2022, which was initially the projected opening year of the project. The TIA determined that widening of the northbound ramp and retiming of the southbound ramp intersection would be required to mitigate project impacts. To verify whether this was the case under 2023 Conditions as discussed in a meeting with City staff, new traffic counts at the ramp intersections were collected on August 31, 2023. (The new traffic counts included peak hour factors, pedestrians and bicycles, and heavy vehicles.) Additionally, the intersections surrounding the Lathrop Road/I-5 interchange were recently retimed and coordinated, and this analysis utilizes these new timings.
Under 2023 Existing Conditions with new signal timings, the ramp intersections both operate at LOS D or better during both peak hours. With the addition of project traffic, both intersections continue to operate at LOS D or better, within jurisdictional standards for the City of Lathrop. Table 1 summarizes these results. Based on these findings, it is determined that improvements are no longer required at either ramp intersection to mitigate project impacts.
Table 1 – Level of Service Results
Intersection Name Peak
Hour
2023 Existing
Conditions
2023 Existing Plus
Project Conditions
Change
in
Delay Delay LOS Delay LOS
I-5 NB Ramps & Lathrop Rd AM 14.4 B 18.6 B 4.2
PM 37.5 D 45.6 D 8.1
I-5 SB Ramps & Lathrop Rd AM 32.0 C 34.2 C 2.2
PM 37.4 D 39.5 D 2.1
Item 5.3 Attachment Supplemental_Traffic Analysis
2 In addition to the level of service analysis, the Synchro model was utilized for a SimTraffic analysis to identify potential queuing impacts at the northbound and southbound ramps under 2023 Existing plus Project conditions. Based on ten one-hour simulation runs, queuing on both ramps would be fully contained within the available storage and would not affect the freeway mainline. Table 2 summarizes these results
Table 2 – Queuing Results
Intersection Dir. Lane Group Peak Storage 2023 plus
Project
Required
Storage
Lathrop Rd. & I-5 NB
Ramps
NB LTR AM
1600
402 405
PM 984 985
Lathrop Road/I-5 SB Ramps SB LTR AM
1525
477 780
PM 707 710
3 Appendix
Level of Service Worksheets
Simulation Queueing Worksheets
HCM 6th Signalized Intersection Summary Existing Conditions 3: I-5 NB Off Ramp/I-5 NB On Ramp & Lathrop Road Timing Plan: A.M. Peak Lathrop Interchange Update Synchro 11 Report
TJKM 09/11/2023
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 133 821 0 0 852 280 84 2 214 0 0 0 Future Volume (veh/h) 133 821 0 0 852 280 84 2 214 0 0 0 Initial Q (Qb), veh 000000000
Ped-Bike Adj(A_pbT) 1.00 1.00 1.00 0.95 1.00 0.99
Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No
Adj Sat Flow, veh/h/ln 1811 1841 0 0 1870 1870 1767 1767 1767 Adj Flow Rate, veh/h 141 873 0 0 906 298 89 2 228
Peak Hour Factor 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 Percent Heavy Veh, % 640022999
Cap, veh/h 162 2424 0 0 1471 482 96 2 245
Arrive On Green 0.19 1.00 0.00 0.00 1.00 1.00 0.22 0.22 0.22 Sat Flow, veh/h 1725 3589 0 0 2682 848 428 10 1097
Grp Volume(v), veh/h 141 873 0 0 621 583 319 0 0
Grp Sat Flow(s),veh/h/ln 1725 1749 0 0 1777 1660 1535 0 0 Q Serve(g_s), s 10.3 0.0 0.0 0.0 0.0 0.0 26.5 0.0 0.0
Cycle Q Clear(g_c), s 10.3 0.0 0.0 0.0 0.0 0.0 26.5 0.0 0.0 Prop In Lane 1.00 0.00 0.00 0.51 0.28 0.71
Lane Grp Cap(c), veh/h 162 2424 0 0 1010 943 342 0 0
V/C Ratio(X) 0.87 0.36 0.00 0.00 0.61 0.62 0.93 0.00 0.00 Avail Cap(c_a), veh/h 172 2424 0 0 1010 943 463 0 0
HCM Platoon Ratio 2.00 2.00 1.00 1.00 2.00 2.00 1.00 1.00 1.00 Upstream Filter(I) 0.84 0.84 0.00 0.00 0.88 0.88 1.00 0.00 0.00 Uniform Delay (d), s/veh 52.0 0.0 0.0 0.0 0.0 0.0 49.5 0.0 0.0 Incr Delay (d2), s/veh 27.7 0.4 0.0 0.0 2.5 2.7 18.9 0.0 0.0 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 5.3 0.1 0.0 0.0 0.7 0.7 11.7 0.0 0.0 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 79.7 0.4 0.0 0.0 2.5 2.7 68.5 0.0 0.0 LnGrp LOS EAAAAAEAA
Approach Vol, veh/h 1014 1204 319
Approach Delay, s/veh 11.4 2.6 68.5
Approach LOS B A E
Timer - Assigned Phs 2 5 6 8
Phs Duration (G+Y+Rc), s 95.2 16.2 79.0 34.8
Change Period (Y+Rc), s 5.1 4.0 5.1 5.8
Max Green Setting (Gmax), s 79.9 13.0 62.9 39.2
Max Q Clear Time (g_c+I1), s 2.0 12.3 2.0 28.5
Green Ext Time (p_c), s 6.8 0.0 10.1 0.5
Intersection Summary
HCM 6th Ctrl Delay 14.4
HCM 6th LOS B
HCM 6th Signalized Intersection Summary Existing Conditions 4: I-5 SB On Ramp/I-5 SB Off Ramp & Spartan Way/Lathrop Road Timing Plan: A.M. Peak Lathrop Interchange Update Synchro 11 Report
TJKM 09/11/2023
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 0 703 87 290 646 0 0 0 0 247 3 115 Future Volume (veh/h) 0 703 87 290 646 0 0 0 0 247 3 115 Initial Q (Qb), veh 000000 000
Ped-Bike Adj(A_pbT) 1.00 0.98 1.00 1.00 1.00 1.00
Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No
Adj Sat Flow, veh/h/ln 0 1856 1856 1841 1870 0 1796 1796 1796 Adj Flow Rate, veh/h 0 764 95 315 702 0 268 3 125
Peak Hour Factor 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 Percent Heavy Veh, % 033420 777
Cap, veh/h 0 1153 142 654 1244 0 286 3 133
Arrive On Green 0.00 0.25 0.25 0.75 1.00 0.00 0.26 0.26 0.26 Sat Flow, veh/h 0 4722 562 1753 1870 0 1115 12 520
Grp Volume(v), veh/h 0 565 294 315 702 0 396 0 0
Grp Sat Flow(s),veh/h/ln 0 1689 1740 1753 1870 0 1647 0 0 Q Serve(g_s), s 0.0 19.5 19.8 9.3 0.0 0.0 30.6 0.0 0.0
Cycle Q Clear(g_c), s 0.0 19.5 19.8 9.3 0.0 0.0 30.6 0.0 0.0 Prop In Lane 0.00 0.32 1.00 0.00 0.68 0.32
Lane Grp Cap(c), veh/h 0 855 440 654 1244 0 422 0 0
V/C Ratio(X) 0.00 0.66 0.67 0.48 0.56 0.00 0.94 0.00 0.00 Avail Cap(c_a), veh/h 0 855 440 654 1244 0 556 0 0
HCM Platoon Ratio 1.00 1.00 1.00 2.00 2.00 1.00 1.00 1.00 1.00 Upstream Filter(I) 0.00 1.00 1.00 0.75 0.75 0.00 1.00 0.00 0.00 Uniform Delay (d), s/veh 0.0 43.5 43.6 11.5 0.0 0.0 47.3 0.0 0.0 Incr Delay (d2), s/veh 0.0 4.0 7.8 0.2 1.4 0.0 18.3 0.0 0.0 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 0.0 8.6 9.4 2.7 0.5 0.0 14.5 0.0 0.0 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 0.0 47.5 51.5 11.7 1.4 0.0 65.6 0.0 0.0 LnGrp LOS A D D B A A E A A
Approach Vol, veh/h 859 1017 396
Approach Delay, s/veh 48.9 4.6 65.6
Approach LOS D A E
Timer - Assigned Phs 1 2 4 6
Phs Duration (G+Y+Rc), s 53.6 38.0 38.4 91.6
Change Period (Y+Rc), s 5.1 * 5.1 5.1 5.1
Max Green Setting (Gmax), s 39.0 * 33 43.9 75.9
Max Q Clear Time (g_c+I1), s 11.3 21.8 32.6 2.0
Green Ext Time (p_c), s 0.1 3.9 0.7 5.2
Intersection Summary
HCM 6th Ctrl Delay 32.0
HCM 6th LOS C
Notes
* HCM 6th computational engine requires equal clearance times for the phases crossing the barrier.
HCM 6th Signalized Intersection Summary Existing Conditions 3: I-5 NB Off Ramp/I-5 NB On Ramp & Lathrop Road Timing Plan: P.M. Peak Lathrop Interchange Update Synchro 11 Report
TJKM 09/11/2023
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 46 771 0 0 718 248 110 6 543 0 0 0 Future Volume (veh/h) 46 771 0 0 718 248 110 6 543 0 0 0 Initial Q (Qb), veh 000000000
Ped-Bike Adj(A_pbT) 1.00 1.00 1.00 0.97 1.00 1.00
Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No
Adj Sat Flow, veh/h/ln 1870 1870 0 0 1870 1870 1870 1870 1870 Adj Flow Rate, veh/h 48 803 0 0 748 258 115 6 566
Peak Hour Factor 0.96 0.96 0.96 0.96 0.96 0.96 0.96 0.96 0.96 Percent Heavy Veh, % 220022222
Cap, veh/h 126 1945 0 0 1156 399 102 5 503
Arrive On Green 0.14 1.00 0.00 0.00 0.90 0.90 0.38 0.38 0.38 Sat Flow, veh/h 1781 3647 0 0 2666 887 270 14 1330
Grp Volume(v), veh/h 48 803 0 0 517 489 687 0 0
Grp Sat Flow(s),veh/h/ln 1781 1777 0 0 1777 1682 1614 0 0 Q Serve(g_s), s 3.6 0.0 0.0 0.0 10.3 10.3 55.2 0.0 0.0
Cycle Q Clear(g_c), s 3.6 0.0 0.0 0.0 10.3 10.3 55.2 0.0 0.0 Prop In Lane 1.00 0.00 0.00 0.53 0.17 0.82
Lane Grp Cap(c), veh/h 126 1945 0 0 799 756 610 0 0
V/C Ratio(X) 0.38 0.41 0.00 0.00 0.65 0.65 1.13 0.00 0.00 Avail Cap(c_a), veh/h 207 1945 0 0 799 756 610 0 0
HCM Platoon Ratio 2.00 2.00 1.00 1.00 2.00 2.00 1.00 1.00 1.00 Upstream Filter(I) 0.95 0.95 0.00 0.00 0.92 0.92 1.00 0.00 0.00 Uniform Delay (d), s/veh 59.8 0.0 0.0 0.0 4.6 4.6 45.4 0.0 0.0 Incr Delay (d2), s/veh 0.7 0.6 0.0 0.0 3.7 3.9 76.3 0.0 0.0 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 1.6 0.2 0.0 0.0 2.8 2.6 34.2 0.0 0.0 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 60.5 0.6 0.0 0.0 8.3 8.5 121.7 0.0 0.0 LnGrp LOS EAAAAAFAA
Approach Vol, veh/h 851 1006 687
Approach Delay, s/veh 4.0 8.4 121.7
Approach LOS A A F
Timer - Assigned Phs 2 5 6 8
Phs Duration (G+Y+Rc), s 85.0 14.3 70.7 61.0
Change Period (Y+Rc), s 5.1 4.0 5.1 5.8
Max Green Setting (Gmax), s 79.9 17.0 58.9 55.2
Max Q Clear Time (g_c+I1), s 2.0 5.6 12.3 57.2
Green Ext Time (p_c), s 6.0 0.0 7.4 0.0
Intersection Summary
HCM 6th Ctrl Delay 37.5
HCM 6th LOS D
HCM 6th Signalized Intersection Summary Existing Conditions 4: I-5 SB On Ramp/I-5 SB Off Ramp & Spartan Way/Lathrop Road Timing Plan: P.M. Peak Lathrop Interchange Update Synchro 11 Report
TJKM 09/11/2023
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 0 392 60 237 591 0 0 0 0 419 8 155 Future Volume (veh/h) 0 392 60 237 591 0 0 0 0 419 8 155 Initial Q (Qb), veh 000000 000
Ped-Bike Adj(A_pbT) 1.00 0.98 1.00 1.00 1.00 1.00
Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No
Adj Sat Flow, veh/h/ln 0 1885 1885 1856 1870 0 1856 1856 1856 Adj Flow Rate, veh/h 0 426 65 258 642 0 455 9 168
Peak Hour Factor 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 Percent Heavy Veh, % 011320 333
Cap, veh/h 0 1170 174 449 1026 0 470 9 174
Arrive On Green 0.00 0.26 0.26 0.51 1.00 0.00 0.38 0.38 0.38 Sat Flow, veh/h 0 4677 671 1767 1870 0 1233 24 455
Grp Volume(v), veh/h 0 322 169 258 642 0 632 0 0
Grp Sat Flow(s),veh/h/ln 0 1716 1747 1767 1870 0 1712 0 0 Q Serve(g_s), s 0.0 11.2 11.6 14.8 0.0 0.0 52.8 0.0 0.0 Cycle Q Clear(g_c), s 0.0 11.2 11.6 14.8 0.0 0.0 52.8 0.0 0.0 Prop In Lane 0.00 0.38 1.00 0.00 0.72 0.27
Lane Grp Cap(c), veh/h 0 891 454 449 1026 0 653 0 0
V/C Ratio(X) 0.00 0.36 0.37 0.57 0.63 0.00 0.97 0.00 0.00 Avail Cap(c_a), veh/h 0 891 454 449 1026 0 702 0 0
HCM Platoon Ratio 1.00 1.00 1.00 2.00 2.00 1.00 1.00 1.00 1.00 Upstream Filter(I) 0.00 1.00 1.00 0.74 0.74 0.00 1.00 0.00 0.00 Uniform Delay (d), s/veh 0.0 44.2 44.3 30.4 0.0 0.0 44.3 0.0 0.0 Incr Delay (d2), s/veh 0.0 1.1 2.3 0.9 2.1 0.0 24.8 0.0 0.0 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 0.0 4.9 5.3 5.2 0.6 0.0 26.5 0.0 0.0 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 0.0 45.3 46.7 31.3 2.1 0.0 69.1 0.0 0.0 LnGrp LOS A D D C A A E A A
Approach Vol, veh/h 491 900 632
Approach Delay, s/veh 45.8 10.5 69.1
Approach LOS D B E
Timer - Assigned Phs 1 2 4 6
Phs Duration (G+Y+Rc), s 42.2 43.0 60.8 85.2
Change Period (Y+Rc), s 5.1 * 5.1 5.1 5.1
Max Green Setting (Gmax), s 34.0 * 38 59.9 75.9
Max Q Clear Time (g_c+I1), s 16.8 13.6 54.8 2.0
Green Ext Time (p_c), s 0.1 2.9 0.9 4.5
Intersection Summary
HCM 6th Ctrl Delay 37.4
HCM 6th LOS D
Notes
* HCM 6th computational engine requires equal clearance times for the phases crossing the barrier.
HCM 6th Signalized Intersection Summary Existing Plus Project Conditions 3: I-5 NB Off Ramp/I-5 NB On Ramp & Lathrop Road Timing Plan: A.M. Peak Lathrop Interchange Update Synchro 11 Report
TJKM 09/11/2023
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 161 829 0 0 864 280 127 2 214 0 0 0 Future Volume (veh/h) 161 829 0 0 864 280 127 2 214 0 0 0 Initial Q (Qb), veh 000000000
Ped-Bike Adj(A_pbT) 1.00 1.00 1.00 0.94 1.00 0.99
Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No
Adj Sat Flow, veh/h/ln 1811 1841 0 0 1870 1870 1767 1767 1767 Adj Flow Rate, veh/h 171 882 0 0 919 298 135 2 228
Peak Hour Factor 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 0.94 Percent Heavy Veh, % 640022999
Cap, veh/h 172 2331 0 0 1392 449 143 2 242
Arrive On Green 0.20 1.00 0.00 0.00 1.00 1.00 0.25 0.25 0.25 Sat Flow, veh/h 1725 3589 0 0 2692 838 575 9 970
Grp Volume(v), veh/h 171 882 0 0 627 590 365 0 0
Grp Sat Flow(s),veh/h/ln 1725 1749 0 0 1777 1660 1554 0 0 Q Serve(g_s), s 12.9 0.0 0.0 0.0 0.0 0.0 30.0 0.0 0.0
Cycle Q Clear(g_c), s 12.9 0.0 0.0 0.0 0.0 0.0 30.0 0.0 0.0 Prop In Lane 1.00 0.00 0.00 0.51 0.37 0.62
Lane Grp Cap(c), veh/h 172 2331 0 0 952 889 388 0 0
V/C Ratio(X) 0.99 0.38 0.00 0.00 0.66 0.66 0.94 0.00 0.00 Avail Cap(c_a), veh/h 172 2331 0 0 952 889 468 0 0
HCM Platoon Ratio 2.00 2.00 1.00 1.00 2.00 2.00 1.00 1.00 1.00 Upstream Filter(I) 0.76 0.76 0.00 0.00 0.87 0.87 1.00 0.00 0.00 Uniform Delay (d), s/veh 51.9 0.0 0.0 0.0 0.0 0.0 47.8 0.0 0.0 Incr Delay (d2), s/veh 57.1 0.4 0.0 0.0 3.1 3.4 23.4 0.0 0.0 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 7.6 0.1 0.0 0.0 0.8 0.8 13.7 0.0 0.0 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 109.1 0.4 0.0 0.0 3.1 3.4 71.3 0.0 0.0 LnGrp LOS F AAAAAEAA
Approach Vol, veh/h 1053 1217 365
Approach Delay, s/veh 18.0 3.2 71.3
Approach LOS B A E
Timer - Assigned Phs 2 5 6 8
Phs Duration (G+Y+Rc), s 91.8 17.0 74.8 38.2
Change Period (Y+Rc), s 5.1 4.0 5.1 5.8
Max Green Setting (Gmax), s 79.9 13.0 62.9 39.2
Max Q Clear Time (g_c+I1), s 2.0 14.9 2.0 32.0
Green Ext Time (p_c), s 6.9 0.0 10.3 0.5
Intersection Summary
HCM 6th Ctrl Delay 18.6
HCM 6th LOS B
HCM 6th Signalized Intersection Summary Existing Plus Project Conditions 4: I-5 SB On Ramp/I-5 SB Off Ramp & Spartan Way/Lathrop Road Timing Plan: A.M. Peak Lathrop Interchange Update Synchro 11 Report
TJKM 09/11/2023
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 0 739 114 290 701 0 0 0 0 247 3 158 Future Volume (veh/h) 0 739 114 290 701 0 0 0 0 247 3 158 Initial Q (Qb), veh 000000 000
Ped-Bike Adj(A_pbT) 1.00 0.98 1.00 1.00 1.00 1.00
Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No
Adj Sat Flow, veh/h/ln 0 1856 1856 1841 1870 0 1796 1796 1796 Adj Flow Rate, veh/h 0 803 124 315 762 0 268 3 172
Peak Hour Factor 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 Percent Heavy Veh, % 033420 777
Cap, veh/h 0 1118 171 601 1188 0 283 3 182
Arrive On Green 0.00 0.25 0.25 0.69 1.00 0.00 0.29 0.29 0.29 Sat Flow, veh/h 0 4583 677 1753 1870 0 988 11 634
Grp Volume(v), veh/h 0 613 314 315 762 0 443 0 0
Grp Sat Flow(s),veh/h/ln 0 1689 1716 1753 1870 0 1633 0 0 Q Serve(g_s), s 0.0 21.5 21.8 11.5 0.0 0.0 34.5 0.0 0.0 Cycle Q Clear(g_c), s 0.0 21.5 21.8 11.5 0.0 0.0 34.5 0.0 0.0 Prop In Lane 0.00 0.39 1.00 0.00 0.60 0.39
Lane Grp Cap(c), veh/h 0 855 434 601 1188 0 468 0 0
V/C Ratio(X) 0.00 0.72 0.72 0.52 0.64 0.00 0.95 0.00 0.00 Avail Cap(c_a), veh/h 0 855 434 601 1188 0 551 0 0
HCM Platoon Ratio 1.00 1.00 1.00 2.00 2.00 1.00 1.00 1.00 1.00 Upstream Filter(I) 0.00 1.00 1.00 0.67 0.67 0.00 1.00 0.00 0.00 Uniform Delay (d), s/veh 0.0 44.3 44.4 15.2 0.0 0.0 45.4 0.0 0.0 Incr Delay (d2), s/veh 0.0 5.1 10.1 0.3 1.8 0.0 22.6 0.0 0.0 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 0.0 9.5 10.4 3.4 0.6 0.0 16.7 0.0 0.0 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 0.0 49.4 54.5 15.5 1.8 0.0 68.0 0.0 0.0 LnGrp LOS A D D B A A E A A
Approach Vol, veh/h 927 1077 443
Approach Delay, s/veh 51.1 5.8 68.0
Approach LOS D A E
Timer - Assigned Phs 1 2 4 6
Phs Duration (G+Y+Rc), s 49.7 38.0 42.3 87.7
Change Period (Y+Rc), s 5.1 * 5.1 5.1 5.1
Max Green Setting (Gmax), s 39.0 * 33 43.9 75.9
Max Q Clear Time (g_c+I1), s 13.5 23.8 36.5 2.0
Green Ext Time (p_c), s 0.1 3.7 0.7 5.9
Intersection Summary
HCM 6th Ctrl Delay 34.2
HCM 6th LOS C
Notes
* HCM 6th computational engine requires equal clearance times for the phases crossing the barrier.
HCM 6th Signalized Intersection Summary Existing Plus Project Conditions 3: I-5 NB Off Ramp/I-5 NB On Ramp & Lathrop Road Timing Plan: P.M. Peak Lathrop Interchange Update Synchro 11 Report
TJKM 09/11/2023
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 97 786 0 0 729 248 148 6 543 0 0 0 Future Volume (veh/h) 97 786 0 0 729 248 148 6 543 0 0 0 Initial Q (Qb), veh 000000000
Ped-Bike Adj(A_pbT) 1.00 1.00 1.00 0.97 1.00 1.00
Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No
Adj Sat Flow, veh/h/ln 1870 1870 0 0 1870 1870 1870 1870 1870 Adj Flow Rate, veh/h 101 819 0 0 759 258 154 6 566
Peak Hour Factor 0.96 0.96 0.96 0.96 0.96 0.96 0.96 0.96 0.96 Percent Heavy Veh, % 220022222
Cap, veh/h 144 1945 0 0 1134 385 130 5 478
Arrive On Green 0.16 1.00 0.00 0.00 0.88 0.88 0.38 0.38 0.38 Sat Flow, veh/h 1781 3647 0 0 2677 878 344 13 1265
Grp Volume(v), veh/h 101 819 0 0 522 495 726 0 0
Grp Sat Flow(s),veh/h/ln 1781 1777 0 0 1777 1684 1622 0 0 Q Serve(g_s), s 7.8 0.0 0.0 0.0 12.7 12.7 55.2 0.0 0.0
Cycle Q Clear(g_c), s 7.8 0.0 0.0 0.0 12.7 12.7 55.2 0.0 0.0 Prop In Lane 1.00 0.00 0.00 0.52 0.21 0.78
Lane Grp Cap(c), veh/h 144 1945 0 0 780 739 613 0 0
V/C Ratio(X) 0.70 0.42 0.00 0.00 0.67 0.67 1.18 0.00 0.00 Avail Cap(c_a), veh/h 207 1945 0 0 780 739 613 0 0
HCM Platoon Ratio 2.00 2.00 1.00 1.00 2.00 2.00 1.00 1.00 1.00 Upstream Filter(I) 0.89 0.89 0.00 0.00 0.92 0.92 1.00 0.00 0.00 Uniform Delay (d), s/veh 59.5 0.0 0.0 0.0 5.8 5.8 45.4 0.0 0.0 Incr Delay (d2), s/veh 2.1 0.6 0.0 0.0 4.2 4.4 98.6 0.0 0.0 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 3.4 0.2 0.0 0.0 3.3 3.2 38.2 0.0 0.0 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 61.6 0.6 0.0 0.0 9.9 10.2 144.0 0.0 0.0 LnGrp LOS EAAAABFAA
Approach Vol, veh/h 920 1017 726
Approach Delay, s/veh 7.3 10.1 144.0
Approach LOS A B F
Timer - Assigned Phs 2 5 6 8
Phs Duration (G+Y+Rc), s 85.0 15.8 69.2 61.0
Change Period (Y+Rc), s 5.1 4.0 5.1 5.8
Max Green Setting (Gmax), s 79.9 17.0 58.9 55.2
Max Q Clear Time (g_c+I1), s 2.0 9.8 14.7 57.2
Green Ext Time (p_c), s 6.2 0.0 7.5 0.0
Intersection Summary
HCM 6th Ctrl Delay 45.6
HCM 6th LOS D
HCM 6th Signalized Intersection Summary Existing Plus Project Conditions 4: I-5 SB On Ramp/I-5 SB Off Ramp & Spartan Way/Lathrop Road Timing Plan: P.M. Peak Lathrop Interchange Update Synchro 11 Report
TJKM 09/11/2023
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR Lane Configurations
Traffic Volume (veh/h) 0 458 110 237 640 0 0 0 0 419 8 193 Future Volume (veh/h) 0 458 110 237 640 0 0 0 0 419 8 193 Initial Q (Qb), veh 000000 000
Ped-Bike Adj(A_pbT) 1.00 0.98 1.00 1.00 1.00 1.00
Parking Bus, Adj 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Work Zone On Approach No No No
Adj Sat Flow, veh/h/ln 0 1885 1885 1856 1870 0 1856 1856 1856 Adj Flow Rate, veh/h 0 498 120 258 696 0 455 9 210
Peak Hour Factor 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 0.92 Percent Heavy Veh, % 011320 333
Cap, veh/h 0 1076 252 407 982 0 466 9 215
Arrive On Green 0.00 0.26 0.26 0.46 1.00 0.00 0.41 0.41 0.41 Sat Flow, veh/h 0 4316 970 1767 1870 0 1149 23 530
Grp Volume(v), veh/h 0 409 209 258 696 0 674 0 0
Grp Sat Flow(s),veh/h/ln 0 1716 1686 1767 1870 0 1703 0 0 Q Serve(g_s), s 0.0 14.7 15.3 16.2 0.0 0.0 56.9 0.0 0.0 Cycle Q Clear(g_c), s 0.0 14.7 15.3 16.2 0.0 0.0 56.9 0.0 0.0 Prop In Lane 0.00 0.58 1.00 0.00 0.68 0.31
Lane Grp Cap(c), veh/h 0 891 438 407 982 0 690 0 0
V/C Ratio(X) 0.00 0.46 0.48 0.63 0.71 0.00 0.98 0.00 0.00 Avail Cap(c_a), veh/h 0 891 438 412 982 0 699 0 0
HCM Platoon Ratio 1.00 1.00 1.00 2.00 2.00 1.00 1.00 1.00 1.00 Upstream Filter(I) 0.00 1.00 1.00 0.66 0.66 0.00 1.00 0.00 0.00 Uniform Delay (d), s/veh 0.0 45.4 45.7 34.7 0.0 0.0 42.8 0.0 0.0 Incr Delay (d2), s/veh 0.0 1.7 3.7 1.6 2.9 0.0 28.0 0.0 0.0 Initial Q Delay(d3),s/veh 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 %ile BackOfQ(50%),veh/ln 0.0 6.5 6.8 5.9 0.8 0.0 28.8 0.0 0.0 Unsig. Movement Delay, s/veh
LnGrp Delay(d),s/veh 0.0 47.2 49.4 36.2 2.9 0.0 70.7 0.0 0.0 LnGrp LOS A D D D A A E A A
Approach Vol, veh/h 618 954 674
Approach Delay, s/veh 47.9 11.9 70.7
Approach LOS D B E
Timer - Assigned Phs 1 2 4 6
Phs Duration (G+Y+Rc), s 38.7 43.0 64.3 81.7
Change Period (Y+Rc), s 5.1 * 5.1 5.1 5.1
Max Green Setting (Gmax), s 34.0 * 38 59.9 75.9
Max Q Clear Time (g_c+I1), s 18.2 17.3 58.9 2.0
Green Ext Time (p_c), s 0.1 3.6 0.3 5.1
Intersection Summary
HCM 6th Ctrl Delay 39.5
HCM 6th LOS D
Notes
* HCM 6th computational engine requires equal clearance times for the phases crossing the barrier.
Queuing and Blocking Report A.M. Peak
Existing Plus Project Conditions 09/22/2023
Scenario 1 Lathrop Interchange Update SimTraffic Report TJKM Page 1
Intersection: 3: I-5 NB Off Ramp/I-5 NB On Ramp & Lathrop Road Movement EB EB EB WB WB NB
Directions Served L T T T TR LTR
Maximum Queue (ft) 294 56 26 559 558 427
Average Queue (ft) 151 4 2 365 458 250
95th Queue (ft) 257 25 14 643 666 402
Link Distance (ft) 502 502 502 531 531 1653
Upstream Blk Time (%) 2 8
Queuing Penalty (veh) 7 37
Storage Bay Dist (ft)
Storage Blk Time (%)
Queuing Penalty (veh)
Intersection: 4: I-5 SB On Ramp/I-5 SB Off Ramp & Spartan Way/Lathrop Road Movement EB EB EB B12 B12 B12 WB WB SB
Directions Served T T TR T T T L T LTR
Maximum Queue (ft) 249 268 253 74 126 55 348 290 549
Average Queue (ft) 123 207 172 4 19 4 203 87 297
95th Queue (ft) 230 286 247 41 82 35 320 209 477
Link Distance (ft) 182 182 182 1011 1011 1011 502 502 901 Upstream Blk Time (%) 4 17 8
Queuing Penalty (veh) 0 0 0
Storage Bay Dist (ft)
Storage Blk Time (%)
Queuing Penalty (veh)
Zone Summary
Zone wide Queuing Penalty: 44
Queuing and Blocking Report P.M. Peak
Existing Plus Project Conditions 09/22/2023
Scenario 1 Lathrop Interchange Update SimTraffic Report TJKM Page 1
Intersection: 3: I-5 NB Off Ramp/I-5 NB On Ramp & Lathrop Road Movement EB EB EB WB WB NB
Directions Served L T T T TR LTR
Maximum Queue (ft) 135 143 139 409 465 854
Average Queue (ft) 89 102 97 225 385 623
95th Queue (ft) 159 163 166 481 546 984
Link Distance (ft) 499 499 499 531 531 1728
Upstream Blk Time (%) 0 0
Queuing Penalty (veh) 0 1
Storage Bay Dist (ft)
Storage Blk Time (%)
Queuing Penalty (veh)
Intersection: 4: I-5 SB On Ramp/I-5 SB Off Ramp & Spartan Way/Lathrop Road Movement EB EB EB B12 B12 WB WB SB
Directions Served T T TR T T L T LTR
Maximum Queue (ft) 101 220 193 15 3 208 187 580
Average Queue (ft) 45 164 153 3 1 140 117 475
95th Queue (ft) 121 237 211 25 7 247 209 707
Link Distance (ft) 182 182 182 1011 1011 499 499 901
Upstream Blk Time (%) 7 3 1
Queuing Penalty (veh) 0 0 0
Storage Bay Dist (ft)
Storage Blk Time (%)
Queuing Penalty (veh)
Zone Summary
Zone wide Queuing Penalty: 2