Trip Generation Memo
1
Trip Generation Technical Memorandum
Seabreeze Townhomes
New Hanover County, NC
Prepared for SB Cottage Investments, LLC
DAVENPORT Project Number 232016
Prepared and Sealed by Donald R. Bennett, II
5/9/2023
1.0 Introduction
DAVENPORT has prepared this technical memorandum to summarize the trip generation based
on a proposed rezoning for parcels located at 7641, 7645 and 7647 Carolina Beach Road.
The existing site is currently zoned as R-15 Residential according to the New Hanover County
GIS Zoning Map. The future land use plan designates the site as a potential Community Mixed
Use and General Residential Place.
The proposed land use is to rezone to R-5 Residential to allow for Single Family Attached
Townhomes. Based on the existing and proposed intensities, this location will not require a TIA
by the NCDOT, New Hanover County, or Wilmington Metropolitan Planning Organization
(WMPO) standards of 100 peak hour trips. For comparison, theoretical mixes of uses allowed in
the community mixed use potential zoning have been provided. It is likely that the uses provided
under the community mixed use scenario zoning would require a TIA.
2.0 Existing Conditions
A desktop review of the existing roadway conditions in the study area was conducted.
2.1. Site Plan
The conceptual site plan provided as Figure 1 shows the proposed 56 townhome units. Figure 2A
shows the approximate location within New Hanover County. Figure 2B illustrates the site in
relationship to the surrounding public roadway system.
2.2. Site Access
Site access is provided via frontage directly onto SR 1575 (Service Road), which parallels US
421 south of S. Seebreeze Road. As shown in Figure 3, an unnamed right of way exists between
the parcels extending into the site and providing access to two small parcels addressed to S.
Seabreeze Road. SR 1575 also serves as access to approximately 50 parcels south of the subject
site. Per NHC GIS, there are a few private or informal accesses that connect SR 1575 to Saltspray
Lane and Roscoe Freeman Avenue. The aerials and NHC GIS indicate other unnamed accesses
that pass below the Snows Cut Bridge and provide access to SR 1576 (River Road).
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
5/9/2023
Page 2 05/09/2023
Seabreeze Townhomes DAVENPORT Project No. 232016
2
2.3. Sight Distance
Based on Google Street view, the site access has adequate sight distance at both the proposed
site access to SR 1575 and at the service road access to SR 1531 (South Seabreeze Road). A
formal evaluation of sight distance would be required of any development whether by-right or as
proposed through the NCDOT driveway permitting process. The intersection of SR 1575 at S.
Seabreeze Road is unsignalized. S. Seabreeze Road at US 421 is signalized (NCDOT Signal
Inventory Number 03-0827).
2.4. Traffic Counts
Based on NCDOT 2021 AADT mapping, US 421 is estimated to carry approximately 32,500
vehicles per day (vpd) measured just north of the Snows Cut Bridge but south of S. Seabreeze
Road. US 421 has an AADT of approximately 36,000 vpd as measured approximately 1.5 miles
north of S. Seabreeze Road and represents the addition of many trips from the residential
subdivisions between S. Seabreeze and the sampling location. S. Seabreeze Road indicated a
2019 AADT of approximately 400 vehicles per day; however, the highest recorded AADT in the
last twenty years was captured in 2017 at 480 vpd. The AADT of SR 1575 is not listed but can be
estimated as 500 vpd based on the number of residential parcels accessing the roadway. A
summary of the AADTs and inventory of the surrounding roadway network is provided in Figure
4.
3.0 Trip Generation (Existing and Proposed Zoning)
The Institute of Transportation Engineers (ITE) 11th Edition Trip Generation Manual was used to
project the weekday daily, AM peak hour, and PM peak hour traffic that could be generated by
the site. No internal capture, pass-by, or diverted trips are assumed. The results of the trip
generation for the existing and proposed uses are shown in Table 1.
Table 1 - ITE Trip Generation: Average Weekday Driveway Volumes
ITE 11th Edition
Land Use Size Data
Source Weekday AM Peak Hour PM Peak Hour
Enter Exit Total Enter Exit Total
Existing Zoning:
210, Single-Family
Detached Housing
21 Dwelling
Units
Adjacent-
Equation 240 5 13 18 14 9 23
Proposed Zoning:
215, Single-Family
Attached Housing
56 Dwelling
Units
Adjacent-
Equation 376 6 17 23 18 12 30
Differential Expected Trips +136 +1 +4 +5 +4 +3 +7
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
Page 3 05/09/2023
Seabreeze Townhomes DAVENPORT Project No. 232016
3
Trip Generation, (Future Land Use Plan)
While the site is not currently zoned for Community Mixed Use, parcels fronting SR 1575
are listed as such in the New Hanover Future Land Use Plan. Figure 5 provides excerpts
from the Future Land Use Plan that illustrate potential uses that are typical of the Community
Mixed Use zone. For comparison, trips were generated for uses that can be accommodated
under that classification. Table 2 provides the potential trips from these uses. The selected
uses each have a potential for over 100 trips per hour and up to over 5,000 vehicles per day
under the Future Land Use Plan.
Table 2 - ITE Trip Generation: Average Weekday Driveway Volumes (Future Land Use Plan)
ITE 11th Edition
Land Use Size Data
Source Weekday AM Peak Hour PM Peak Hour
Enter Exit Total Enter Exit Total
720 – Medical
Office
100
kSF
Dwelling
Units
Adjacent-
Equation 4,189 190 51 191 121 283 404
821 – Shopping
Plaza (retail) 80 kSF Dwelling
Units
Generator-
Equation* 5,402* 219 228 447 230 136 426
720 – Medical
Office + 822 Retail
40 kSF
+40kSF kSF Adjacent-
Equation 3,529 126 52 178 152 216 368
822 – Retail +
220 – Multifamily
40 kSF
+40 DU
kSF &
Dwelling
Units
Adjacent-
Equation 2,250 51 56 107 128 118 246
*Rate only provided for 24 hr. volumes
4.0 Conclusion
In conclusion, this memorandum provides the estimated trip generation for multiple potential users
on the site. Comparisons are provided for the existing and requested Zoning classifications. To
provide a sense of scale, trips that could be generated if the site were zoned per the Future Land
Use Plan were provided. Based on the estimated trip generation associated with the proposed
zoning, less than 10 trips are added in each of the typical peak hours, or one additional vehicle
every 6 minutes.
Please let us know if you need additional information.
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
Page 4 05/09/2023
Seabreeze Townhomes DAVENPORT Project No. 232016
4
Supporting Documents
Conceptual Site Plan – Figure 1
Site Location Map – Figure 2A
Site Plan Relationship Map – Figure 2B
New Hanover County Parcel Map Excerpt – Figure 3
Existing Lane Geometry – Figure 4
Future Land Use Plan Information – Figure 5
Trip Generation Plots
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
FIGURE 1
CONCEPTUAL SITE PLAN
Seabreeze Townhomes- Wilmington, NC
Project Number 232016
N
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
FIGURE 2A
SITE LOCATION MAP
PROJECT NUMBER 232016
SITE INDICATOR
N
SITE
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
FIGURE 2B – Site Plan Relationship Map
Seabreeze Townhomes – New Hanover County, NC
Project Number 232016
N
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
FIGURE 3 – New Hanover County Parcel Map Excerpt
Seabreeze Townhomes – New Hanover County, NC
Project Number 232016
N
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
*** NOT TO SCALE ***
N
This document, together with the concepts and designs presented herein, is intended only for the specific purpose
and client for which it was prepared. Reuse of, or improper reliance on, this document by others without written
authorization and adaptation by DAVENPORT, shall be without liability to DAVENPORT, and shall be a violation
of the agreement between DAVENPORTand the client.
FIGURE 4 EXISTING LANE GEOMETRY
DAVENPORT PROJECT NAME
LOCATION, NC
PROJECT NUMBER 230000
2021 AADT
VOLUMESXXXX
BLACK = EXISTING
TRAFFIC MOVEMENT
ROADWAY
LEGEND
SIGNAL
STOP
SPEED
LIMIT
45
Se
r
v
i
c
e
R
o
a
d
US
4
2
1
C
a
r
o
l
i
n
a
Be
a
c
h
R
o
a
d
South Seabreeze
Road
River Road
SPEED
LIMIT
45
32
5
'
32
5
'
4003,700
32
,
5
0
0
SPEED
LIMIT
45
SPEED
LIMIT
55
35
0
'
12
5
'
US
4
2
1
C
a
r
o
l
i
n
a
Be
a
c
h
R
o
a
d
50'
36
,
0
0
0
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
Figure 5 Seabreeze Townhomes – NHC Future Land Use Plan
Details Project Number 232016
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6
DocuSign Envelope ID: 386C94CF-3157-42FC-BA92-0FAA725FF0A6