HomeMy WebLinkAboutSP-23-013 - Supplemental - 1233 Shelburne RoadMEMO
To:Jeff O’Hara, Repario Properties
From:Abigail Dery, P.E.
Date:April 14, 2023
Re:Lakewood Commons – Building F
Project-Generated Traffic
TCE was asked to consider the traffic impacts on converting the formerly retail “Building F” in the
Lakewood Commons development into a 70-student daycare facility. Lakewood Commons is a Planned
Unit Development (PUD) with a mix of professional office and service uses located on the west side of
Shelburne Road in South Burlington, Vermont. This memo outlines the project-generated traffic for the
site compared to the maximum traffic budget for the site, per the South Burlington Land Development
Regulations (LDRs).
Project Access/Location
Direct access from Shelburne Road is via an
existing driveway, which is currently
restricted to ingress only. All traffic exiting
the project onto Shelburne Road
(considered a high-volume roadway) must
do so via Lewis Road and Holmes Road,
which intersects Shelburne Road to the
south of the project and is controlled by a
traffic signal.
Traffic Budget – Lakewood Commons
The original Lakewood Commons complex
was permitted for and occupied
approximately 48,000 sq. ft. of office space
and a 150-seat restaurant. The Traffic Study
and subsequent addenda for that project
identified this as generating 160 PM Peak
Hour trips.
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1233 Shelburne Road
TCE Project #23-031
4/14/2023
2
Project-Generated Traffic
The PM peak hour trip generation from existing uses on site was calculated using current ITE Trip
Generation rates for the existing office spaces (Buildings A, C, D, and E) on site, and a locally developed
trip generation rate for the Eagles Club (Building B). ITE does not have a good, standard category for the
use operating out of Building B – which is the Eagles Club. The ITE use that would match is 591-
Lodge/Fraternal Organization. However, the rate identified for this use is based on a study of 1 site
surveyed in 1977 in California, with on-site facilities including a clubhouse with 3 dining rooms, tennis
courts, swimming pool, etc. It would not be appropriate to use this study as a good comparison for the
existing site. For that reason, the observed traffic volume is a better indicator of existing traffic for this
site.
The Eagles Club, the Moose Lodge on Williston Road in South Burlington, the Elks Club on North Avenue
in Burlington, and the St. Johns Club on Central Ave in Burlington were observed for the one-week period
from 1/9/17 to 1/13/17 to determine a local trip-generation rate. The traffic volumes had a strong
correlation to the building square footage, with the average rate being 5.25 trips per 1,000 SQ FT.
Proposed project-generated traffic was calculated using the average rate for Daycare Center (Land Use
565) published in the ITE Trip Generation Manual, 11th Edition. At 0.79 trips per student, a 70-student
daycare center estimated to generate 56 PM peak hour trips, on average. Converting the Building F retail
space from “retail” to “daycare center” would result in PUD-generated traffic of 127 PM peak hour trips.
The traffic volume for each the ITE theoretical volume and the observed traffic volume is summarized in
the table below.
Table 1:Proposed Project-Generated Traffic
Building Land Use Size Traffic Budget
1,000 SF Rate Trips Prior Approval
A,C,D,E Office(1)40.0 Eq.41
B
Private Social
Club/Lodge(2)5.4 5.46 30
F Daycare Center(4)70 student 0.79 56
Total 127 160
(1)
(2)
(3)
(4) 565 - Daycare Center
Local Trip Gen. Rate for Private Social Club/Lodge
826 - Specialty Retail
ITE Trip Generation
160 trips
710 - General Office - Urban-Mixed-Use (T = 0.83(X)+7.46)
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1233 Shelburne Road
TCE Project #23-031
4/14/2023
3
Conclusion
The conversion of Building F from retail space to a 70-student daycare facility will result in 127 PM Peak
Hour Trips. Lakewood Commons traffic must egress to Shelburne Road via a signalized intersection. The
traffic budget for the Lakewood Commons parcel, based on prior approvals, is 160 PM peak hour trips.
The proposed PM peak hour trip generation does not exceed the allocated budget. Based on the the
egress traffic being required to use the existing traffic signal at the Holmes Road/Shelburne Road
intersection, the project is not anticipated to have an undue adverse impact on traffic.