HomeMy WebLinkAboutTraffic Analysis 11-11-21
TRAFFIC OPERATIONS ANALYSIS
PROPOSED RESIDENTIAL DEVELOPMENT
FLORA PUD
CARMEL, INDIANA
________________________________________________
PREPARED FOR
_______________________________________________
NOVEMBER 2021 8365 Keystone Crossing, Suite 201 Indianapolis, IN 46240 Phone: (317) 202-0864 Fax: (317) 202-0908
PROPOSED RESIDENTIAL DEVELOPMENT
CARMEL, INDIANA
COPYRIGHT
This analysis and the ideas, designs, concepts and data contained herein are
the exclusive intellectual property of A&F Engineering Co., LLC and are
not to be used or reproduced in whole or in part, without the written consent
of A&F Engineering Co., LLC.
2021, A&F Engineering Co., LLC
PROPOSED RESIDENTIAL DEVELOPMENT
CARMEL, INDIANA
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TABLE OF CONTENTS
TABLE OF CONTENTS ..................................................................................................................................................... II
CERTIFICATION .............................................................................................................................................................. II
INTRODUCTION & PURPOSE ........................................................................................................................................... 1
SCOPE OF WORK ............................................................................................................................................................ 1
DESCRIPTION OF THE PROPOSED DEVELOPMENT ........................................................................................................... 2
EXISTING TRAFFIC VOLUMES ........................................................................................................................................ 2
TABLE 1 – PEAK HOUR EXISTING TRAFFIC VOLUMES .................................................................................................. 2
GENERATED TRIPS FOR PROPOSED DEVELOPMENT ........................................................................................................ 3
TABLE 2 – GENERATED TRIPS FOR PROPOSED DEVELOPMENT ..................................................................................... 3
ASSIGNMENT AND DISTRIBUTION OF GENERATED TRIPS ............................................................................................... 3
GENERATED TRIPS ADDED TO THE STREET SYSTEM ...................................................................................................... 3
TABLE 3 – TRAFFIC VOLUME SUMMARY ...................................................................................................................... 4
CAPACITY ANALYSIS ..................................................................................................................................................... 4
CAPACITY ANALYSIS SCENARIOS .................................................................................................................................. 5
TABLE 4 – LEVEL OF SERVICE SUMMARY: SPRINGMILL ROAD & ILLINOIS STREET ..................................................... 5
CONCLUSIONS & RECOMMENDATIONS .......................................................................................................................... 5
CERTIFICATION
I certify that this TRAFFIC OPERATIONS ANALYSIS has been prepared by me and under my immediate
supervision and that I have experience and training in the field of traffic and transportation
engineering.
A&F ENGINEERING CO., LLC
Indiana Registration 10200056
PROPOSED RESIDENTIAL DEVELOPMENT
CARMEL, INDIANA
1
INTRODUCTION & PURPOSE
This TRAFFIC OPERATIONS ANALYSIS, prepared at the request of the City of Carmel on behalf of
Pittman Partners, is for a proposed residential development that will be located west of the intersection
of Springmill Road and Illinois Street in Carmel, Indiana.
The purpose of this analysis is to determine what impact traffic generated by the proposed residential
development will have on the intersection of Springmill Road and Illinois Street. This analysis will
identify any existing roadway deficiencies or ones that may occur in the future.
Conclusions will be reached that will determine if the roadway system can accommodate the
anticipated traffic volumes or will determine the modifications that will be required to the system if
there are identified deficiencies.
Recommendations will be made that will address the conclusions resulting from this analysis. These
recommendations will address feasible roadway system improvements to provide safe ingress and
egress, to and from the proposed residential development.
SCOPE OF WORK
The scope of work for this analysis is as follows:
First, obtain peak hour turning movement traffic volume counts between the hours of 6:30 AM
and 9:00 AM and 4:00 PM and 7:00 PM at the intersection of Springmill Road and Illinois Street.
Second, estimate the number of peak hour trips that will be generated by the proposed residential
development.
Third, assign and distribute the generated peak hour traffic from the proposed residential
development to the intersection of Springmill Road and Illinois Street.
Fourth, prepare a capacity/level of service analysis at the intersection of Springmill Road and Illinois
Street for each of the following scenarios:
Scenario 1: Existing Traffic Volumes – Based on existing peak hour traffic volumes.
Scenario 2: Proposed Development Traffic Volumes – Based on the sum of existing peak hour traffic
volumes and generated traffic volumes from the proposed development.
Fifth, prepare recommendations for the roadway geometrics that will be needed to accommodate
the future traffic volumes.
PROPOSED RESIDENTIAL DEVELOPMENT
CARMEL, INDIANA
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Finally, prepare a report documenting all data, analyses, conclusions, and recommendations to
provide for the safe and efficient movement of traffic through the study area.
DESCRIPTION OF THE PROPOSED DEVELOPMENT
The proposed development will be located west of the Springmill Road/Illinois Street intersection.
The proposed residential development will consist of approximately 129 residential units, with a
mix of brownstones, courtyard homes, townhomes and duplexes. As proposed, the site will be
served by an access drive that will create a fourth leg at the Springmill Road/Illinois Street
Roundabout.
EXISTING TRAFFIC VOLUMES
Turning movement traffic volume counts were collected by A&F Engineering at the intersection of
Springmill Road and Illinois Street between the hours of 6:30 AM to 9:00 AM and 4:00 PM to 7:00
PM during a typical weekday in October 2021. According to the turning movement counts, the
AM Peak Hour occurs from 7:45 AM to 8:45 AM and the PM Peak Hour occurs from 4:30 PM to
5:30 PM. Table 1 is a summary of the existing traffic volumes, and the count output summary
sheets are included in the Appendix.
TABLE 1 – PEAK HOUR EXISTING TRAFFIC VOLUMES
APPROACH
NORTHBOUND
(Springmill Rd.)
SOUTHBOUND
(Springmill Rd.)
EASTBOUND
(Access Drive)
WESTBOUND
(Illinois St.)
MOVEMENT L T R L T R L T R L T R
AM PEAK --- 130 304 9 216 --- --- --- --- 101 --- 2
PM PEAK --- 197 145 2 152 --- --- --- --- 223 --- 16
PROPOSED RESIDENTIAL DEVELOPMENT
CARMEL, INDIANA
3
GENERATED TRIPS FOR PROPOSED DEVELOPMENT
The estimate of newly generated traffic is a function of the development size and of the character
of the land use. The ITE Trip Generation Manual 1 was used to calculate the number of trips that
will be generated by the proposed development. This report is a compilation of trip data for various
land uses as collected by transportation professionals throughout the United States to establish the
average number of trips generated by those land uses. Table 2 summarizes the total trips that will
be generated by the subject site.
TABLE 2 – GENERATED TRIPS FOR PROPOSED DEVELOPMENT
DEVELOPMENT INFORMATION GENERATED TRIPS
LAND USE ITE
CODE SIZE AM PEAK HOUR PM PEAK HOUR
ENTER EXIT ENTER EXIT
Single-Family Housing
(Detached) 210 10 DU 2 7 7 4
Single-Family Housing
(Attached) 215 119 DU 17 39 38 29
TOTAL 19 46 45 33
ASSIGNMENT AND DISTRIBUTION OF GENERATED TRIPS
The generated traffic volumes from the proposed residential development are assigned and distributed
to the intersection of Springmill Road and Illinois Street based on the existing traffic distribution, the
location of destination land uses, and a field review conducted within the area.
The following outlines the assignment and distribution assumptions:
• Outbound/Inbound To/From:
North: 18%
South: 50%
East: 32%
GENERATED TRIPS ADDED TO THE STREET SYSTEM
The total generated traffic volumes that can be expected from the proposed development have been
assigned to the intersection of Springmill Road and Illinois Street. These volumes were determined
based on the trip generation data, and the assignment and distribution of generated traffic. The
total peak hour generated traffic volumes from the proposed development and the sum of existing
1 Trip Generation Manual, Institute of Transportation Engineers, 11th Edition, 2021.
PROPOSED RESIDENTIAL DEVELOPMENT
CARMEL, INDIANA
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traffic volumes and generated traffic volumes from the proposed development are shown in Table
3.
TABLE 3 – TRAFFIC VOLUME SUMMARY
APPROACH NORTHBOUND
(Springmill Rd.)
SOUTHBOUND
(Springmill Rd.)
EASTBOUND
(Access Dr.)
WESTBOUND
(Illinois St.)
MOVEMENT L T R L T R L T R L T R
GENERATED TRAFFIC VOLUMES
AM PEAK 10 --- --- --- --- 3 8 14 23 --- 6 ---
PM PEAK 23 --- --- --- --- 8 6 10 17 --- 14 ---
EXISTING + GENERATED TRAFFIC VOLUMES
AM PEAK 10 130 304 9 216 3 8 14 23 101 6 2
PM PEAK 23 197 145 2 152 8 6 10 17 223 14 16
CAPACITY ANALYSIS
The "efficiency" of an intersection is based on its ability to accommodate the traffic volumes that
approach the intersection. It is defined by the Level-of-Service (LOS) of the intersection. The
LOS is determined by a series of calculations commonly called a "capacity analysis". Input data
into a capacity analysis include traffic volumes, intersection geometry, and number and use of
lanes. To determine the LOS at the intersection of Springmill Road and Illinois Street, a capacity
analysis has been made using the recognized computer program Synchro/SimTraffic2.This program
utilizes the capacity calculation methods outlined within the Highway Capacity Manual (HCM 6th
Edition)3. The following list shows the delays related to the levels of service for a roundabout
intersection:
2 Synchro/SimTraffic 11, Trafficware, 2020.
3 Highway Capacity Manual (HCM), 6th Edition Transportation Research Board, National Research
Council, Washington, DC, 2016.
PROPOSED RESIDENTIAL DEVELOPMENT
CARMEL, INDIANA
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Level of Service Control Delay (seconds/vehicle)
A Less than or equal to 10
B Between 10.1 and 15
C Between 15.1 and 25
D Between 25.1 and 35
E Between 35.1 and 50
F greater than 50
CAPACITY ANALYSIS SCENARIOS
To evaluate the proposed development's effect on the public street system, a series of traffic
volume scenarios were analyzed to determine the adequacy of the existing roadway network. From
this analysis, necessary recommendations are made to improve the public street system so it will
accommodate the future traffic volumes. An analysis has been made for the peak hours at the
intersection of Springmill Road and Illinois Street for the following traffic volume scenarios:
Scenario 1: Existing Traffic Volumes – Based on the existing peak hour traffic volumes.
Scenario 2: Proposed Development Traffic Volumes – Based on the sum of existing peak hour traffic
volumes and generated traffic volumes from the proposed development.
The following table summarizes the peak hour level of service results at the intersection of
Springmill Road and Illinois Street and the Synchro (HCM 6th Edition) intersection reports
illustrating the capacity analysis results are included in the Appendix.
TABLE 4 – LEVEL OF SERVICE SUMMARY: SPRINGMILL ROAD & ILLINOIS STREET
APPROACH
AM PEAK PM PEAK
Analysis Scenario Analysis Scenario
1 2 1 2
Northbound Approach A A A A
Southbound Approach A A A A
Eastbound Approach N/A A N/A A
Westbound Approach A A A A
Intersection A A A A
CONCLUSIONS & RECOMMENDATIONS
Capacity analyses have shown that the intersection of Springmill Road and Illinois Street currently
operates at acceptable levels-of-service. In addition, when traffic from the proposed residential
development is added, capacity analyses have shown that the roundabout will continue to operate
at acceptable levels of service with the addition of a fourth leg to serve the proposed development.
TRAFFIC OPERATIONS ANALYSIS
APPENDIX
8365 Keystone Crossing Boulevard, Suite 201
Indianapolis, IN 46240
Phone: (317) 202-0864 Fax: (317) 202-0908
PROPOSED RESIDENTIAL DEVELOPMENT
CARMEL, INDIANA
SPRINGMILL ROAD & ILLINOIS STREET
TRAFFIC VOLUME COUNTS
CAPACITY ANALYSIS
SPRINGMILL RD & ILLINOIS ST - TMCSPRINGMILL RD & ILLINOIS ST - TMC
Tue Oct 26, 2021
Full Length (6:30 AM-9 AM)
All Classes (Lights and Motorcycles, Heavy)
All Movements
ID: 893315, Location: 39.931926, -86.164659
Provided by: A&F Engineering
8365 Keystone Crossing, Suite 201, Indianapolis, IN, 46240, US
Leg North South East
Direction Southbound Northbound Westbound
Time L T U AppApp T R U AppApp L R U AppApp IntInt
2021-10-26 6:30AM 0 14 0 1414 3 19 0 2222 13 0 0 1313 4949
6:45AM 0 25 0 2525 5 38 0 4343 12 0 0 1212 8080
Hourly Total 0 39 0 3939 8 57 0 6565 25 0 0 2525 129129
7:00AM 0 25 0 2525 6 36 0 4242 11 0 0 1111 7878
7:15AM 0 47 0 4747 8 48 1 5757 13 1 0 1414 118118
7:30AM 0 61 0 6161 15 54 0 6969 22 2 0 2424 154154
7:45AM 5 66 0 7171 29 86 0 115115 30 0 1 3131 217217
Hourly Total 5 199 0 204204 58 224 1 283283 76 3 1 8080 567567
8:00AM 1 44 0 4545 43 74 1 118118 17 0 0 1717 180180
8:15AM 2 51 0 5353 35 83 0 118118 26 0 1 2727 198198
8:30AM 1 55 0 5656 23 61 1 8585 28 0 0 2828 169169
8:45AM 2 41 0 4343 23 62 0 8585 24 0 0 2424 152152
Hourly Total 6 191 0 197197 124 280 2 406406 95 0 1 9696 699699
TotalTotal 11 429 0 440440 190 561 3 754754 196 3 2 201201 13951395
% Approach% Approach 2.5% 97.5% 0% --25.2% 74.4% 0.4% --97.5% 1.5% 1.0%---
% Total% Total 0.8% 30.8% 0% 31.5%31.5%13.6% 40.2% 0.2% 54.1%54.1%14.1% 0.2% 0.1% 14.4%14.4%-
Lights and MotorcyclesLights and Motorcycles 11 425 0 436436 186 560 3 749749 193 3 1 197197 1382
% Lights and Motorcycles% Lights and Motorcycles 100% 99.1% 0% 99.1%99.1%97.9% 99.8% 100% 99.3%99.3%98.5% 100% 50.0% 98.0%98.0%99.1%
HeavyHeavy 0 4 0 44 4 1 0 55 3 0 1 44 13
% Heavy% Heavy 0% 0.9% 0% 0.9%0.9%2.1% 0.2% 0% 0.7%0.7%1.5% 0% 50.0% 2.0%2.0%0.9%
*L: Left, R: Right, T: Thru, U: U-Turn
1 of 4
SPRINGMILL RD & ILLINOIS ST - TMCSPRINGMILL RD & ILLINOIS ST - TMC
Tue Oct 26, 2021
AM Peak (7:45 AM - 8:45 AM) - Overall Peak Hour
All Classes (Lights and Motorcycles, Heavy)
All Movements
ID: 893315, Location: 39.931926, -86.164659
Provided by: A&F Engineering
8365 Keystone Crossing, Suite 201, Indianapolis, IN, 46240, US
Leg North South East
Direction Southbound Northbound Westbound
Time L T U AppApp T R U AppApp L R U AppApp IntInt
2021-10-26 7:45AM 5 66 0 7171 29 86 0 115115 30 0 1 3131 217217
8:00AM 1 44 0 4545 43 74 1 118118 17 0 0 1717 180180
8:15AM 2 51 0 5353 35 83 0 118118 26 0 1 2727 198198
8:30AM 1 55 0 5656 23 61 1 8585 28 0 0 2828 169169
TotalTotal 9 216 0 225225 130 304 2 436436 101 0 2 103103 764764
% Approach% Approach 4.0% 96.0% 0% --29.8% 69.7% 0.5% --98.1% 0% 1.9% ---
% Total% Total 1.2% 28.3% 0% 29.5%29.5%17.0% 39.8% 0.3% 57.1%57.1%13.2% 0% 0.3% 13.5%13.5%-
PHFPHF 0.450 0.818 - 0.7920.792 0.756 0.884 0.500 0.9240.924 0.842 - 0.500 0.8310.831 0.880
Lights and MotorcyclesLights and Motorcycles 9 215 0 224224 127 303 2 432432 99 0 1 100100 756
% Lights and Motorcycles% Lights and Motorcycles 100% 99.5% 0% 99.6%99.6%97.7% 99.7% 100% 99.1%99.1%98.0% 0% 50.0% 97.1%97.1%99.0%
HeavyHeavy 0 1 0 11 3 1 0 44 2 0 1 33 8
% Heavy% Heavy 0% 0.5% 0% 0.4%0.4%2.3% 0.3% 0% 0.9%0.9%2.0% 0% 50.0% 2.9%2.9%1.0%
*L: Left, R: Right, T: Thru, U: U-Turn
3 of 4
SPRINGMILL RD & ILLINOIS ST - TMCSPRINGMILL RD & ILLINOIS ST - TMC
Mon Nov 1, 2021
Full Length (4 PM-7 PM)
All Classes (Lights and Motorcycles, Heavy)
All Movements
ID: 893969, Location: 39.931926, -86.164659
Provided by: A&F Engineering
8365 Keystone Crossing, Suite 201, Indianapolis, IN, 46240, US
Leg North South East
Direction Southbound Northbound Westbound
Time L T U AppApp T R U AppApp L R U AppApp IntInt
2021-11-01 4:00PM 0 34 0 3434 42 32 0 7474 24 0 0 2424 132132
4:15PM 0 29 0 2929 47 29 0 7676 26 0 0 2626 131131
4:30PM 1 47 0 4848 49 21 0 7070 58 3 0 6161 179179
4:45PM 0 26 0 2626 55 43 0 9898 48 6 0 5454 178178
Hourly Total 1 136 0 137137 193 125 0 318318 156 9 0 165165 620620
5:00PM 1 44 0 4545 49 37 0 8686 56 2 0 5858 189189
5:15PM 0 35 0 3535 44 44 0 8888 61 5 0 6666 189189
5:30PM 1 31 0 3232 36 40 0 7676 61 3 0 6464 172172
5:45PM 0 25 0 2525 35 27 0 6262 31 0 0 3131 118118
Hourly Total 2 135 0 137137 164 148 0 312312 209 10 0 219219 668668
6:00PM 0 25 0 2525 19 31 2 5252 43 3 0 4646 123123
6:15PM 0 29 0 2929 29 17 0 4646 28 0 0 2828 103103
6:30PM 0 31 0 3131 26 14 0 4040 42 0 0 4242 113113
6:45PM 0 19 0 1919 16 12 0 2828 29 2 0 3131 7878
Hourly Total 0 104 0 104104 90 74 2 166166 142 5 0 147147 417417
7:00PM 0 0 0 00 0 0 0 00 0 0 0 00 00
Hourly Total 0 0 0 00 0 0 0 00 0 0 0 00 00
TotalTotal 3 375 0 378378 447 347 2 796796 507 24 0 531531 17051705
% Approach% Approach 0.8% 99.2% 0% --56.2% 43.6% 0.3% --95.5% 4.5% 0% ---
% Total% Total 0.2% 22.0% 0% 22.2%22.2%26.2% 20.4% 0.1% 46.7%46.7%29.7% 1.4% 0% 31.1%31.1%-
Lights and MotorcyclesLights and Motorcycles 2 372 0 374374 441 342 2 785785 503 24 0 527527 1686
% Lights and Motorcycles% Lights and Motorcycles 66.7% 99.2% 0% 98.9%98.9%98.7% 98.6% 100% 98.6%98.6%99.2% 100% 0% 99.2%99.2%98.9%
HeavyHeavy 1 3 0 44 6 5 0 1111 4 0 0 44 19
% Heavy% Heavy 33.3% 0.8% 0% 1.1%1.1%1.3% 1.4% 0% 1.4%1.4%0.8% 0% 0% 0.8%0.8%1.1%
*L: Left, R: Right, T: Thru, U: U-Turn
1 of 4
SPRINGMILL RD & ILLINOIS ST - TMCSPRINGMILL RD & ILLINOIS ST - TMC
Mon Nov 1, 2021
PM Peak (4:30 PM - 5:30 PM) - Overall Peak Hour
All Classes (Lights and Motorcycles, Heavy)
All Movements
ID: 893969, Location: 39.931926, -86.164659
Provided by: A&F Engineering
8365 Keystone Crossing, Suite 201, Indianapolis, IN, 46240, US
Leg North South East
Direction Southbound Northbound Westbound
Time L T U AppApp T R U AppApp L R U AppApp IntInt
2021-11-01 4:30PM 1 47 0 4848 49 21 0 7070 58 3 0 6161 179179
4:45PM 0 26 0 2626 55 43 0 9898 48 6 0 5454 178178
5:00PM 1 44 0 4545 49 37 0 8686 56 2 0 5858 189189
5:15PM 0 35 0 3535 44 44 0 8888 61 5 0 6666 189189
TotalTotal 2 152 0 154154 197 145 0 342342 223 16 0 239239 735735
% Approach% Approach 1.3% 98.7% 0% --57.6% 42.4% 0% --93.3% 6.7% 0% ---
% Total% Total 0.3% 20.7% 0% 21.0%21.0%26.8% 19.7% 0% 46.5%46.5%30.3% 2.2% 0% 32.5%32.5%-
PHFPHF 0.500 0.809 - 0.8020.802 0.895 0.824 - 0.8720.872 0.914 0.667 - 0.9050.905 0.972
Lights and MotorcyclesLights and Motorcycles 1 152 0 153153 193 143 0 336336 223 16 0 239239 728
% Lights and Motorcycles% Lights and Motorcycles 50.0% 100% 0% 99.4%99.4%98.0% 98.6% 0% 98.2%98.2%100% 100% 0% 100%100%99.0%
HeavyHeavy 1 0 0 11 4 2 0 66 0 0 0 00 7
% Heavy% Heavy 50.0% 0% 0% 0.6%0.6%2.0% 1.4% 0% 1.8%1.8%0% 0% 0% 0%0%1.0%
*L: Left, R: Right, T: Thru, U: U-Turn
3 of 4
Springmill & Illinios AM Peak Existing
3: 11/04/2021
AM Existing 10:47 am 11/04/2021 Baseline Synchro 11 Report
Page 1
Intersection
Intersection Delay, s/veh 4.5
Intersection LOS A
Approach WB NB SB
Entry Lanes 2 2 1
Conflicting Circle Lanes 1 1 1
Adj Approach Flow, veh/h 117 493 255
Demand Flow Rate, veh/h 120 507 262
Vehicles Circulating, veh/h 152 10 118
Vehicles Exiting, veh/h 365 370 154
Ped Vol Crossing Leg, #/h 0 0 0
Ped Cap Adj 1.000 1.000 1.000
Approach Delay, s/veh 3.8 4.4 4.9
Approach LOS A A A
Lane Left Right Left Right Left
Designated Moves L TR LT R LT
Assumed Moves L TR LT R LT
RT Channelized
Lane Util 0.983 0.017 0.300 0.700 1.000
Follow-Up Headway, s 2.535 2.535 2.535 2.535 2.609
Critical Headway, s 4.544 4.544 4.544 4.544 4.976
Entry Flow, veh/h 118 2 152 355 262
Cap Entry Lane, veh/h 1237 1237 1407 1407 1223
Entry HV Adj Factor 0.975 1.000 0.971 0.972 0.972
Flow Entry, veh/h 115 2 148 345 255
Cap Entry, veh/h 1205 1237 1366 1368 1189
V/C Ratio 0.095 0.002 0.108 0.252 0.214
Control Delay, s/veh 3.8 2.9 3.5 4.8 4.9
LOS AA AA A
95th %tile Queue, veh 0 0 0 1 1
Springmill & Illinois AM Proposed
3: 11/09/2021
AM Proposed 10:47 am 11/04/2021 Baseline Synchro 11 Report
Page 1
Intersection
Intersection Delay, s/veh 4.6
Intersection LOS A
Approach EB WB NB SB
Entry Lanes 1221
Conflicting Circle Lanes 1111
Adj Approach Flow, veh/h 49 124 504 258
Demand Flow Rate, veh/h 50 127 518 265
Vehicles Circulating, veh/h 380 172 34 136
Vehicles Exiting, veh/h 21 380 395 163
Ped Vol Crossing Leg, #/h 0000
Ped Cap Adj 1.000 1.000 1.000 1.000
Approach Delay, s/veh 4.4 3.9 4.5 5.1
Approach LOS AAAA
Lane Left Left Right Left Right Left
Designated Moves LTR LT R LT R LTR
Assumed Moves LTR LT R LT R LTR
RT Channelized
Lane Util 1.000 0.984 0.016 0.315 0.685 1.000
Follow-Up Headway, s 2.609 2.535 2.535 2.535 2.535 2.609
Critical Headway, s 4.976 4.544 4.544 4.544 4.544 4.976
Entry Flow, veh/h 50 125 2 163 355 265
Cap Entry Lane, veh/h 937 1214 1214 1377 1377 1201
Entry HV Adj Factor 0.974 0.975 1.000 0.973 0.972 0.972
Flow Entry, veh/h 49 122 2 159 345 258
Cap Entry, veh/h 912 1184 1214 1339 1338 1168
V/C Ratio 0.053 0.103 0.002 0.118 0.258 0.221
Control Delay, s/veh 4.4 3.9 3.0 3.6 4.9 5.1
LOS A AAAAA
95th %tile Queue, veh 0 0 0 0 1 1
Springmill & Illinios PM Peak Existing
3: 11/04/2021
PM Existing 12:59 pm 11/04/2021 Synchro 11 Report
Page 1
Intersection
Intersection Delay, s/veh 4.2
Intersection LOS A
Approach WB NB SB
Entry Lanes 2 2 1
Conflicting Circle Lanes 1 1 1
Adj Approach Flow, veh/h 246 352 159
Demand Flow Rate, veh/h 248 355 161
Vehicles Circulating, veh/h 205 2 232
Vehicles Exiting, veh/h 152 391 221
Ped Vol Crossing Leg, #/h 0 0 0
Ped Cap Adj 1.000 1.000 1.000
Approach Delay, s/veh 4.7 3.6 4.7
Approach LOS A A A
Lane Left Right Left Right Left
Designated Moves L TR LT R LT
Assumed Moves L TR LT R LT
RT Channelized
Lane Util 0.935 0.065 0.577 0.423 1.000
Follow-Up Headway, s 2.535 2.535 2.535 2.535 2.609
Critical Headway, s 4.544 4.544 4.544 4.544 4.976
Entry Flow, veh/h 232 16 205 150 161
Cap Entry Lane, veh/h 1178 1178 1418 1418 1089
Entry HV Adj Factor 0.991 1.000 0.990 0.993 0.990
Flow Entry, veh/h 230 16 203 149 159
Cap Entry, veh/h 1168 1178 1404 1408 1078
V/C Ratio 0.197 0.014 0.145 0.106 0.148
Control Delay, s/veh 4.8 3.2 3.7 3.4 4.7
LOS AA AA A
95th %tile Queue, veh 1 0 1 0 1
Springmill & Illinois PM Proposed
3: 11/09/2021
PM Proposed 12:59 pm 11/04/2021 Synchro 11 Report
Page 1
Intersection
Intersection Delay, s/veh 4.4
Intersection LOS A
Approach EB WB NB SB
Entry Lanes 1221
Conflicting Circle Lanes 1111
Adj Approach Flow, veh/h 36 261 377 168
Demand Flow Rate, veh/h 36 263 381 170
Vehicles Circulating, veh/h 393 237 20 272
Vehicles Exiting, veh/h 49 163 409 228
Ped Vol Crossing Leg, #/h 0000
Ped Cap Adj 1.000 1.000 1.000 1.000
Approach Delay, s/veh 4.3 5.0 3.8 5.0
Approach LOS AAAA
Lane Left Left Right Left Right Left
Designated Moves LTR LT R LT R LTR
Assumed Moves LTR LT R LT R LTR
RT Channelized
Lane Util 1.000 0.939 0.061 0.606 0.394 1.000
Follow-Up Headway, s 2.609 2.535 2.535 2.535 2.535 2.609
Critical Headway, s 4.976 4.544 4.544 4.544 4.544 4.976
Entry Flow, veh/h 36 247 16 231 150 170
Cap Entry Lane, veh/h 924 1145 1145 1395 1395 1046
Entry HV Adj Factor 0.994 0.991 1.000 0.987 0.993 0.991
Flow Entry, veh/h 36 245 16 228 149 168
Cap Entry, veh/h 919 1134 1145 1376 1385 1036
V/C Ratio 0.039 0.216 0.014 0.166 0.108 0.163
Control Delay, s/veh 4.3 5.1 3.3 4.0 3.4 5.0
LOS A AAAAA
95th %tile Queue, veh 0 1 0 1 0 1