HomeMy WebLinkAboutSupplemental Materials (12-26-16)SANDOWENGINEERING
160 MADISON STREET SUITE A EUGENE, OREGON 97402 541.513.3376
December 26, 2016
Scott Gillespie
City of Eugene
Public Works Engineering
99 East Broadway, Suite 400
Eugene, OR 97401
RE: Amazon Corners AM Peak Hour Evaluation
Dear Mr. Gillespie
As per your request, Sandow Engineering has evaluated the AM peak hour traffic impacts for the
proposed of Amazon Corner development. The following includes the estimated trip generation and
impacts during the AM peak hour.
Trips to the site are estimated using the data contained within the 9t" edition of the ITE Trip
Generation Manuals. The trip generation was evaluated for the AM peak hour of generator and the
peak hour of adjacent street traffic. The estimated development trips are provided in Table 1 for the
peak hour of generator and Table 2 for the peak hour of adjacent street traffic.
Trip Generation
ITE Land Use Size Rate
Trips
826-Specialty Retail Center 14 ksf GLA 6.84*(x)
96
220 - Apartments 108 DU T = 0.54(X) + 2.45
61
Total
157
Trip Generation
ITE Land Use Size Rate Trips In
826-Specialty Retail Center 14 ksf GLA n/a*
% Trips Trips
Out In Out
220 - Apartments 108 DU T = 0.49(X) + 3.73 57 20% 80% 11 46
Total 57 11 46
*no trip generation as there is little to no traffic generated during the 7-9 AM time period from these types of land
uses.
From: Kelly Sandow
RE: Amazon Corners AM Analysis
Date: 12.26.16
Page 2
For most developments, the morning peak for developments occurs at the same time as the
morning peak hour of the adjacent street traffic (7:00-9:00 AM). However, Specialty Retail Centers
typically have a low to no traffic demand during the peak hour of the adjacent street as they
typically contain uses that open after the 9:00 AM peak hour.
As shown in Table 1 and Table 2, the development will generate over 100 trips in the AM peak hour
of generator but does not generate over 100 trips during the 7:00 to 9:00 AM time.
As per EC 9.867 an evaluation of the AM peak hour is triggered if it is shown that the site generates
more than 100 trips in the peak hour. However as per City of Eugene standards, the evaluation is to
be prepared for the AM peak hour of adjacent street traffic that occurs between 7:00 and 9:00 AM.
The site is projected to add 57 vehicle trips during this time period. The following includes the
analysis for the site impacts for the time period between 7:00 and 9:00 AM.
TRIP DISTRIBUTION
The trip distribution follows the same pattern used in the TIA with:
• 70% to/from the north on Hilyard Street
• 30% to/from the south on Hilyard Street
Figure 1 illustrates the distribution of primary trips during the AM peak hour.
TRAFFIC IMPACTS
As demonstrated in Figure 1, the development is not projected to add 50 or more vehicle trips to
any intersection. As per the City of Eugene TIA criteria, intersection evaluation needs to be
completed for intersections that have 50 or more trips added from developments. Therefore,
intersection evaluation is not required for the AM analysis.
As there are no intersections or driveways with 50 or more trips added the impacts of the
development from the AM traffic generation are considered insignificant.
Additionally, the traffic added to the intersections during the PM peak hour are significantly higher,
therefore, the evaluation for the PM peak hour as presented in the TIA represents worst case traffic
conditions for this site. The AM peak hour traffic impacts do not affect the analysis and
recommendations within the TIA.
SANDOW
ENGINEERING
From: Kelly Sandow
RE: Amazon Corners AM Analysis
Date: 12.26.16
Page 3
Please contact me if you have any additional questions or need further information.
Sincerely,
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Figure I: Site Trips - PM Peak Hour
ENGINEERING 160 Madison Street Suite A Eugene, Oregon 97402 - 541.513.3376 - sandowengineering.com