Ammon Foothill - Study_Traffic Impact Study Update 3.25.22
1220 North 500 West, Ste. 202 Lehi, UT 84043 p 801.766.4343 1
www.halesengineering.com
MEMORANDUM
Date: March 22, 2022
To: Nate Meikle
From: Hales Engineering
Subject: Ammon BCP Trip Generation Comparison
UT21-1969
This memorandum discusses the study completed for the BCP development located in Ammon,
Idaho. A prior TIS dated November 24, 2021, had been completed based on a prior site plan.
Since then, unit counts have been updated and the purpose of this memorandum is to compare
trip generation and the roadway network between the two plans and to determine whether a new
TIS would be needed based on this information. A site plan is contained in Appendix A.
Project Description
The proposed project is anticipated to contain residential apartment, townhome, and single-family
units as well as some commercial. A comparison between the new and old land uses is shown in
Table 1.
Table 1: Project Land Uses
Land Use Prior Intensity Current Intensity
Single-family detached housing 2,644 Units 1,590 units
Townhomes 498 Units 990 units
Apartments - 560 units
Commercial / Office 100,000 sq. ft. 100,000 sq. ft.
The prior study assumed a total of 3,142 residential units, while the current study assumes 3,140
units.
Trip Generation
Trip generation for the development was calculated using trip generation rates published in the
Institute of Transportation Engineers (ITE), Trip Generation, 10th Edition, 2017. A comparison of
these trips with the prior plan is shown in Table 2.
03/22/2022
1220 North 500 West, Ste. 202 Lehi, UT 84043 p 801.766.4343 2
www.halesengineering.com
Table 2: Trip Generation
Period Prior Plan Current Plan
Weekday Daily 25,944 trips 25,992 trips
Morning Peak Hour 2,226 trips 1,903 trips
Evening Peak Hour 2,720 trips 2,240 trips
As can be seen, the new plan is anticipated to produce slightly more daily trips and fewer peak
hour trips. Morning peak hour trips are anticipated to drop by approximately 15 percent and
evening peak hour trips are anticipated to drop by approximately 18 percent. It is not anticipated
that this drop in trips would have a significant effect on the improvements that were recommended
in the TIS.
Roadway Network
Overall, the new roadway network remains similar to the network in the prior plan. An additional
access is planned to connect to 1st Street, which if anything, would likely improve the level of
service (LOS) at the project intersections onto 1st Street. The other notable change is the
consolidation of accesses onto 21st Street. The prior plan had three, while the current plan
contains two. It is not anticipated that this will have a significant impact on the remaining southeast
access as it is on the eastern edge of the property where little background traffic passes.
Conclusions
The current site plan changes little from a traffic perspective when compared the prior plan. The
current plan has removed two residential units and has shifted toward land uses that produce
lower peak hour trip rates. It is not anticipated that the lowered peak hour trip generation will have
a significant impact on the improvements recommended in the TIS, nor is it anticipated that the
revised roadway network would necessitate any additional improvements that were not
recommended previously. For these reasons, it was determined that the TIS should still be
adequate for the current site plan.
If you have any questions, please contact us at 801.766.4343.
1220 North 500 West, Ste. 202 Lehi, UT 84043 p 801.766.4343
www.halesengineering.com
APPENDIX A
Site Plan
VILLAGE 2AREA = 65.8 ACNET AREA = 58.0 ACROAD AREA = 4.0 ACGREEN SPACE AREA = 3.8 ACVILLAGE 4AREA = 81.0 ACNET AREA = 69.2 ACROAD AREA = 5.0 ACGREEN SPACE AREA = 6.8 ACVILLAGE 6AREA = 33.9 ACNET AREA = 32.3 ACROAD AREA = 1.3 ACGREEN SPACE AREA = 0.3 ACREGIONAL PARKAREA = 26.4 ACVILLAGE 5AREA = 32.8 ACNET AREA = 31.1 ACROAD AREA = 0.3 ACGREEN SPACE AREA = 1.4 ACVILLAGE 3AREA = 60.7 ACNET AREA = 58.3 ACROAD AREA = 0.9 ACGREEN SPACE AREA = 1.5 ACNEIGHBORHOOD 5AREA = 59.3 ACNET AREA = 48.7 ACROAD AREA = 3.5 ACGREEN SPACE AREA = 7.1 ACNEIGHBORHOOD 4AREA = 59.1 ACNET AREA = 51.9 ACROAD AREA = 2.1 ACGREEN SPACE AREA = 5.1 ACNEIGHBORHOOD 3AREA = 32.8 ACNET AREA = 29.9 ACGREEN SPACE AREA = 2.9 ACNEIGHBORHOOD 2GROSS AREA = 45.0 ACNET AREA = 43.0 ACROAD AREA = 0.6 ACGREEN SPACE AREA = 1.4 ACNEIGHBORHOOD 1AREA = 81.6 ACNET AREA = 74.0 ACGREEN SPACE AREA = 7.6 ACNEIGHBORHOOD 1NEIGHBORHOOD 1NEIGHBORHOOD 2OPEN SPACEAREA = 19.9 ACNET AREA = 18.8 ACROAD AREA = 1.1 ACCOMMERCIALAREA = 7.9 ACVILLAGE 1AREA = 48.2 ACNET AREA = 45.2 ACROAD AREA = 3.0 ACLEI PROJECT #:DRAWN BY:DESIGNED BY:SCALE:DATE:SHEET5---REVISIONS4---3---2---1---ENGINEERSSURVEYORSPLANNERS3302 N. Main StreetSpanish Fork, UT 84660Phone: 801.798.0555Fax: 801.798.9393office@lei-eng.comwww.lei-eng.com- A Utah Corporation -NOT
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ION1"=250'1LEI PROJECT #:DRAWN BY:DESIGNED BY:SCALE:DATE:SHEET2021-0020BLS/MJV5---REVISIONS4---3---2---1---3/15/2022ENGINEERSSURVEYORSPLANNERS3302 N. Main StreetSpanish Fork, UT 84660Phone: 801.798.0555Fax: 801.798.9393office@lei-eng.comwww.lei-eng.comFLAGSHIP HOMES
CITY OF AMMON, IDAHO - A Utah Corporation -CONCEPT PLANGDM/JWA2500125250NORTHSCALE:1"=250'S. 52ND E.21ST STREET S
1ST STREET LONA NORTH RD 55TH E