Pond & Company, Inc.
3500 Parkway Lane
Suite 600
Norcross, GA 30092
Architects
Engineers
Planners
678.336.7740
678.336.7744
www pondco.com
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F
MEMORANDUM
To
Company
From
Date
Subject
Mr. David Borkowski, PE - City Engineer
Peachtree City
Pond Project No.
Copies to
Eric Lusher, AICP
January 15, 2015
Richard Fangmann,
PE, PTOE
Traffic Impacts of Potential Redevelopment of Dolci Lodge
INTRODUCTION
This memorandum documents anticipated changes in traffic volume and possible impacts to the transportation system that could be
expected with the potential for the redevelopment of the Dolci Lodge. Located to the east of SR 74, with direct access onto Aberdeen
Parkway, the Dolci Lodge currently includes 233 hotel rooms, a convention center totaling 153,394 square feet, and 25,199 square feet
of restaurant space. As shown in Table 1 below, the potential redevelopment makes some minor but negligible changes to the amount
of convention and retail space while increasing the number of hotel rooms considerably.
Table 1 Existing vs. Potential Dolci Lodge Usage
Usage
Existing
Proposed
Hotel Rooms
233 Rooms
398 Rooms
Convention Center
153,394 Square Feet
151,173 Square Feet
25,199 Square Feet
22,442 Square Feet
Restaurant
TRIP GENERATION
The Institute of Transportation Engineers (ITE) publishes the standard reference Trip Generation Manual (9th Edition), which was
used to estimate the differences in traffic demand that can be expected with the potential changes. This tool documents traffic studies
of similar land uses across the country and correlates traffic demand with different attributes of each land use. In the case of Dolci
Lodge, the most advisable land use to utilize is "Land Use: 301- Hotel", which includes "places of lodging that provide sleeping
accommodations and supporting facilities such as restaurants, cocktail lounges, meeting and banquet rooms or convention facilities,
limited recreational facilities, and/or other retail and service shops." As shown in Table 2, the Trip Generation Manual was utilized to
correlate the number of existing and anticipated hotel rooms at the Dolci Lodge to traffic demand over the course of a typical
weekday, a weekday AM peak hour, and a weekday PM peak hour. As a result, it is estimated that on a typical weekday, the potential
changes to the Dolci Lodge will increase traffic by no more than 1,348 vehicles a day, 86 vehicles (51 inbound//35 outbound) in the
AM peak Hour, and 99 vehicles (51 inbound/48 outbound) in the PM peak hour.
Table 2 Existing vs. Potential Dolci Lodge Trip Generation
Daily
ITE
Number of
Scenario
Code
Units
In
Out
AM Peak Hour
PM Peak Hour
Total
In
Out
Total
In
Out
Total
Existing
310
233
Rooms
952
952
1904
73
51
124
71
69
140
Proposed
310
398
Rooms
1626
1626
3252
124
86
210
122
117
239
Sheet 1 of 5
Pond & Company, Inc.
Architects
Engineers
Planners
3500 Parkway Lane
Suite 600
Norcross, GA 30092
678.336.7740
678.336.7744
www pondco.com
P
F
TRANSPORTATION SYSTEM IMPACTS
The additional vehicles estimated to be generated by the potential redevelopment of the Dolci Lodge were reviewed for their likely
impact to the surrounding transportation system. This was performed in a two-step process:
(1) By considering the likely patterns of where the additional traffic will distribute to and from.
(2) Considering existing traffic flows in the vicinity of the Dolci Lodge to determine the total amount of anticipated future
traffic and performing capacity analysis
Existing traffic demands on the transportation network were considered to develop the likely patterns of where the additional traffic
will distribute, with a relatively large preference for trips to originate to and from the north (to/from Atlanta). The results of this
process and the resulting additional daily traffic volumes are shown in Figure 1.
These resulting volumes were then added to existing traffic flows (shown in Figure 2) to estimate future daily traffic with the potential
redevelopment. As shown in Table 3, the existing and estimated future daily traffic were analyzed for general planning-level segment
Level of Service. As these results show, the majority of the study area segments operate at LOS A/B indicating overall good flow,
with the exception of SR 54 (West of SR 74) which operates at LOS E/F indicating constrained conditions. However, the small
amount of additional traffic generated by the potential Dolci Lodge redevelopment does not change LOS from the existing to the
anticipated future (with the redevelopment) scenario at any of the locations, meaning that from an overall perspective additional study
is not appropriate.
Other considerations include impacts to traffic signals and individual intersections in the vicinity of the Dolci Lodge. The segment
analysis has limited ability to understand the operations and effects of traffic signals (which is why SR 74 is indicated to be a LOS
A/B despite some sporadic congestion at individual intersections at certain times of the day). Nonetheless, this analysis suggests the
impacts to any of the individual intersection locations will likely be negligible at any specific time of day.
A further consideration is access at the intersection at Aberdeen Parkway and SR 74 which will process a considerable amount of the
additional Dolci Lodge traffic. The possibility of needing signalization at the intersection was considered but it is likely the additional
Dolci Lodge traffic will not warrant a traffic signal. This is primarily due to the majority of the traffic orienting to and from the north
on SR 74. For the majority of incoming traffic (the southbound left from southbound SR 74 to eastbound Aberdeen Parkway) there is
an exclusive turn lane with a reasonable amount of storage and likely gaps in the conflicting northbound traffic created from the traffic
signals to the south. For the majority of outgoing traffic (the westbound right from westbound Aberdeen Parkway to northbound SR
74), there is a channelized right turn lane with likely gaps in the same conflicting northbound traffic created from the traffic signals to
the south. Likewise, the presence of this channelized right turn lane suggests that any signal warrant analysis would likely require
“removing the minor-street right-turns”, a methodology preferred by the Georgia Department of Transportation. The removal of these
right turns would likely result in not enough minor street traffic to warrant a traffic signal. Furthermore, for drivers preferring the
protection of a traffic signal, a signal is currently proposed in the SR 54 Corridor Traffic Study to the south at Westpark Drive which
has internal network access to Aberdeen Parkway and the Dolci Lodge.
Sheet 2 of 5
Pond & Company, Inc.
Architects
Engineers
Planners
3500 Parkway Lane
Suite 600
Norcross, GA 30092
678.336.7740
678.336.7744
www pondco.com
P
F
Sheet 3 of 5
Pond & Company, Inc.
Architects
Engineers
Planners
3500 Parkway Lane
Suite 600
Norcross, GA 30092
678.336.7740
678.336.7744
www pondco.com
P
F
Sheet 4 of 5
Pond & Company, Inc.
3500 Parkway Lane
Suite 600
Norcross, GA 30092
Architects
Engineers
Planners
Table 3 Existing and Anticipated Traffic Volumes and Level of Service
Location
Existing
Daily Traffic
SR 74, North of Aberdeen Parkway
SR 74, South of Aberdeen Parkway
SR 74, South of SR 54
SR 54, West of SR 74
SR 54, East of Northlake Drive
Aberdeen Parkway, East of SR 74
Riley Parkway, North of Aberdeen Parkway
30,206
30,206
20,100
42,210
23,720
3,090
2,930
Level of
Service
A/B
A/B
A/B
E/F
A/B
A/B
A/B
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678.336.7744
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Anticipated Future
(with Dolci Lodge Redevelopment)
Daily Traffic
Level of
Service
31,109
A/B
30,502
A/B
20,248
A/B
42,558
E/F
23,828
A/B
4,289
A/B
2,971
A/B
CONCLUSIONS
Based on the results of this analysis, a relatively small amount of additional traffic is anticipated with the proposed Dolci Lodge
redevelopment. This additional traffic is not anticipated to fundamentally change traffic operations in the vicinity. Additionally,
access considerations at Aberdeen Parkway suggest that the existing lanes and traffic control configuration of the intersection at SR 74
and Aberdeen Parkway is likely appropriate to process the anticipated additional traffic. Therefore, more detailed study of the Dolci
Lodge redevelopment is not recommended at this time.
Sheet 5 of 5