HomeMy WebLinkAboutCT 05-10; POINSETTIA PROPERTY; POINSETTIA PROPERTY TRAFFIC IMPACT ANALYSIS; 2005-06-29. OS
June 29, 2005
TO: ASSISTANT ENGINEER, DAVID RICK
FROM: Associate Engineer, Brandon Miles
POINSETTIA PROPERTY TRAFFIC IMPACT ANALYSIS (CT 05-10)
Below are comments for the Poinsettia Property Traffic Impact Analysis Report dated April 27,
2005. I have also provided comments in the report.
The roadway segment south of Poinsettia Lane fronting the project is should be called Sumac
Lane.
The Highway Design Manual refers to ramp meter analysis as Stable, Unstable, and Capacity.
This should be consistent with report.
V/C calculations provided for roadway segments should be revised.
Revise "Cumulative Projects" as noted.
It addition to providing stop control at both driveway access points, other modifications to
signing and striping may be necessary.
Other typographical errors to be revised as noted in report.
'BRANDON ES,P.E.
Associate Engineer
Page 1 of I
1.0 Introduction
The purpose of this study is to determine and analyze traffic impacts from 29 detached residential
dwelling units. The project is to be located on the southwest corner of Poinsettia Lane and Paseo
Del Norte in the City of Carlsbad, California. The location of the project is shown in Figure 1 with
a site plan shown in Figure 2.
This report describes the existing roadway network in the vicinity of the project site and includes a
review of the existing and proposed activities for weekday peak AM and PM periods, and daily
traffic conditions when the project is completed. The format of this study includes the following
chapters:
1.0 Introduction
2.0 Study Methodology
3.0 Existing Conditions
4.0 Project Description
5.0 Existing + Project Conditions
6.0 Cumulative Projects
7.0 Existing + Project + Cumulative Conditions
8.0 Build-Out (Year 2030) Conditions
9.0 Conclusion
LOS EflguneeriDg lilt. Poinsettia Property Draft Traffic Impact Analysis
IfivesUgalive Sc/silts aflullflgiflee,iilg, lilt 1 April 27, 2005
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2.3.1 Intersections
The study intersections were analyzed based on the ICU ratio. This process defines LOS in terms of
the ratio of available intersection capacity. Intersection LOS were calculated using ICU
spreadsheets from the Growth Management Plan Traffic Monitoring Program. The ICU LOS is
described in Table 1.
TABLE 1: INTERSECTION LEVEL OF SERVICE (ICU]
Level of Service Intersection Capacity Utilization Ratio
A 0.00-0.60
B 0.61-0.70
C 0.71-0.80
0 . E
0.81-0.90
0.91-1.00
F Greater than 1.00
Source: Growth Management Plan Traffic Monitoring Program.
The accepted methodology by Caltrans for signalized intersections is the Intersecting Lane Volume
(ILV) methodology. The ILV operations are shown below in Table 2.
P.1 TABLE 2: SIGNALIZED INTERSECTION ILV OPERATIONS [CALTRAJISI
Description of Operations ILV per Hour
Under Capacity <1,200
Near Capacity fU'' 1,200-1,500
Over Capacity c24c.'r > 1,500
Source: Caltrans' Highway Design Manual page 400-2.
2.3.2 Street Segments
The street segments were analyzed on a peak hour basis using a Volume to Capacity ratio (V/C) to
determine the LOS. The City of Carlsbad uses a one-direction capacity of 1,800 vehicles per lane
per hour for LOS capacity calculations.
2.3.3 Freeway Segments
The typical methodology by Caltrans for requiring mainline freeway analyses is when 50 or more
peak hour trips are anticipated to use the freeway. For this project, I-S was not analyzed because the
project is calculated to add less than 50 peak hour trips to 1-5.
2.3.4 Freeway On-Romps
The typical methodology by Caltrans for requiring freeway on-ramp analyses is when 20 or more
peak hour trips are anticipated to use an on-ramp. For this project, the on-ramps at 1-5/Poinsettia
Lane were not analyzed because the project is calculated to add less than 20 peak hour trips. - ILlS Eiigineering INC. Poinsettia Property Draft Traffic Impact Analysis
Invest/iNNs Science aiulIngineering, lilt. 5 April 27, 2005
3.0 Existing Conditions
This section describes the study area street system, peak hour intersection volumes, daily roadway
volumes, and existing LOS.
3.1 Existing Street System
In the vicinity of the project, the following roadways were analyzed as part of this study, which are
described below. The existing roadway conditions are shown in Figure 3.
Poinsettia Lane is a five-lane divided roadway (3 WB lanes and 2 EB lanes) from 1-5 NB Ramps to
Paseo Del Norte and a four-lane divided roadway from Paseo Del Norte to Batiquitos Drive. This
segment is classified as a Major Arterial on the City of Carlsbad Circulation Plan. The posted speed
limit i.41IPH. Bike lanes are provided on both sides of the roadway with curbside parking
prohibited.
is a two-lane undi4ded roadway from Poinsettia Lane to the project points of
way -segrnent~e~-St6s"at_ the gated entrance to the existing
X A
not observed. 'No parking'signs are-posted on both sides of the roadway along the project
frontage.
friA
3.2 Existing Traffic Volumes and LOS Analyses
Existing AM and PM peak hour traffic volumes were obtained from the 2004 Traffic Monitoring
Program for the intersections of:
Poinsettia Lane/Avenida Encinas (8/11/2004)
Poinsettia Lane/I-5 SB Ramps (8/11/2004)
Poinsettia Lane/I-5 NB Ramps (8/11/2004)
Poinsettia Lane/ Paseo Del Norte (8/11/2004)
j
Existing Average Daily Traffic (ADT) volumes were obtaii6 from the 2004 Traffic Monitoring
Program for the segment of Poinsettia Lane from Paseo DYNorte to Batiquitos Drive, which had
count dates of July 20th (Tue) and 21st(Wed), 2004. JADT volumes on the street segments of
Poinsettia Lane from 1-5 to Paseo Del Norte and as &cknt from Poinsettia Lane to the
project access were collect by LOS Engineering, Inc. on Thursday February 3, 2005.
The existing AM, PM, and ADT volumes are shown on Figure 4, with count data iiicluded in
Appendix A. The LOS calculated for the intersections and street segments under existing
conditions are shown in Tables 3 and 4, respectively.
Hiss rn,iiieeriiw, be. Poinsettia Property Draft Traffic Impact Analysis
Inves,igailveSeienceanilEngineerunl, Inc. 7 April 27, 2005
Figure 3: Existing Roadway Conditions
XX AM peak hour volumes at intersections
(YY) PM peak hour volumes at intersections
Z,ZZZ AOT volumes shown along segments- (j) Intersection Reference Number to LOS Tables
--Iw—
No Scale
HIllS Engined ifig, /1W. Poinsettia Property Draft Traffic Impact Analysis
invesligailve Science au!Egg/lied!iiii, iflc 8 April 27, 2005
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Figure 4: Existing Volumes
0
- ....-.-----.-.- ....... 293
(185) (1) (298) (409) (10) (102)
352 (705) - 2 4— 501 (555)
106 (193)
394 (793)
-
,-.. - 305 (175) () 4— 793 (938)
212 (353) .-'
762 (982) —4 4
48 (33)
4— 749 (748)
127 (187) .-_ . 446 (553) 18 (37) -.
't
- 4 (2)
166 2 599 281 13
(172) (2) (492) (18) (7) (7)
\ 1 0
i 35,495
ADT
Poinsettia Lane . (
(49)
ADT
49
--.----- (3)
25 TJ __
Project
----- 6
-- Location ... t 49
25 59 118
(40) (109) (290)
30 (45) - 186 (219)
120 (208) —3 1 4— 240 (236)
36 (58) - - 266 (357)
31 52 220
LEGEND
XX AM peak hour volumes at intersections
(YY) PM peak hour volumes at intersections
Z,ZZZ ADT volumes shown along segments
() Intersection Reference Number to LOS Tables
-1*-
No Scale
HIRS lngifleeriiw, 11w. Poinsettia Property Draft Traffic Impact Analysis
Ilivesligalive Seleilce 21111IiigiiieerIiig, Ifle 9 April 27, 2005
24,332
TABLE 3: EXISTING INTERSECTION OPERATIONS
Intersection and Peak Existing
Control' Hour ICU2 LOS3
1) Poinsettia Ln at AM 0.41 A
Avenida Encinas (S) PM 0.61 B
2) Poinsettia Ln at AM 0.41 A
1-5 SB Ramps (5) PM 0.53 A
Caltrans ILV AM 802 U
Caltrans ILV PM 956 U
3) Poinsettia Ln at AM 0.5 A
1-5 NB Ramps (S) PM 0.51 A
Caltrans ILV AM 802 U
Caltrans ILV PM 956 U
4) Poinsettia Ln at AM 0.53 A
Paseo Del Norte (S) PM 0.62 B
5) Paseo Del Norte at AM DNE DNE
North Project Dwy (U) PM DNE ONE
6) Paseo Del Norte at AM ONE ONE
South Proiect Owv (U) PM DNE ONE
Notes: 1) Intersection Control - S: Signalized; U: Unsignalized. 2) ICU is measured as a ratio to capacity
3) LOS: Level of Service. Caltrans ILV: U-Under Capacity; N-Near Capacity; 0-Over Capacity.
ONE: Does Not Exist
TABLE 4: EXISTING SEGMENT VOLUMES AND OPERATIONS
Roadway and Peak Number Direction Existing
Classification Hourly of and Peak Peak V/C LOS
Capacity Lanes Period Volume
Lane - Maior
From 1-5 1,800 3 WB -AM 1,070 0 A
to Paseo Del Norte 1,800 2 EB -PM 1,372 8 A
(0.30 ) From Paseo Del Norte 1,800 2 WB-AM 801 A
to Batiquitos Drive 1,800 2 EB -PM 1,091 A
Paseo Del Norte
From Poinsettia Ln 1,800 1 NB-AM 49 0.03 A
to Project Access 1,800 1 SB - PM 49 0.03 A
Notes: Peak Volumes from adjacent peak interseciton volume by direction.
Under existing conditions, all study intersections and street segments were calculated to operate at
LOS B or better. Intersections LOS and ILV calculations are included in Appendix A.
lOS lllgilleefifig, Iiie. Poinsettia Property Draft Traffic Impact Analysis
I0ves9iia1iVe Seleilee all!!fngineerlflg 11W. 10 April 27, 2005
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4.0 Project Description
The proposed project consists of 29 detached residential dwelling units. The site. is currently
vacant.
4.1 Project Traffic Generation
The project traffic generation was calculated using SANDAG trip rates from the Brief Guide of
Vehicular Traffic Generation Rates for the San Diego Region, April 2002. Using the SANDAG
rates as shown in Table 5, the project is calculated to generate 290 ADT, 23 AM peak hour trips (7
inbound and 16 outbound), and 29 PM peak hour trips (20 inbound and 9 outbound).
TABLE 5: PROJECT TRAFFIC GENERATION
Proposed - AM PM.
Land Use Rate Size & Units ADT % Split IN OUT % Split IN OUT
Detatched Residential 10 IOU 29 DU 290 8% 0.3 0.7 7 16 10% 0.7 0.3 20 9
Source: SANDAG Brief Guide of Vehicular Traffic Generation Rates for the San Diego Region, April 2002. DU: Dwelling Unit.
4.2 Project Distribution and Assignment
Project trips were distributed to the adjacent roadway network based existing turning movement
distribution patterns. In other words, the distribution for the intersection of Poinsettia Lane at Paseo
Del Norte was calculated by taking the average between the AM and PM existing volumes for the
percentage of left, thru and right vehicles, which calculated to 57% to/from the west, 19% to/from
the north, and 24% to/from the east. This methodology was also applied to the other study
intersections. Calculations are included in Appendix B. The project distribution is shown in
Figure 5 with assignment of the project volumes shown in Figure 6.
4.3 Project Access
Project accessjs4oposed through two new driveways. The driveway will be T-intersections with
as-l1rte. The north driveway will be located approximately 200 feet south of Poinsettia
Lane (centerline to centerline). The south driveway will be located approximately 235 feet south of
the north driveway (centerline to centerline). The City of Carlsbad Street Design Criteria (Table A)
notes a minimum T-intersection spacing of 150 feet for local streets with an ADT volume of up to
2,000 ADT. The existing plus project ADT on Paserte along the project frontage is
anticipated to be 1,664 ADT. A copy of the aforementioned Table A is included in Appendix C.
L.
A queuing analysis was performed for the south leg of Poinsettia Lane and Paseo Del Norte with
buildout volumes (year 2030) to determine if vehicles would queue back and block the entrance
to the north driveway on Paseo Del Norte. The queuing analysis was prepared using Synchro 6.0
(Trafficware Corporation, 2003), which is an intersection analysis software package. Synchro
reports a vehicle queue of 56 feet in the AM period and 45 feet in the PM period for the
northbound left turn approach at Poinsettia Lane/Paseo Del Norte. Based on the Synchro output,
vehicles queuing on the south leg of Poinsettia Lane at Paseo Del Norte will not block the
proposed driveway. Calculations are included in Appendix D.
198 Engiiiec,ii,g IlIC .
Poinsettia Property Draft Traffic Impact Analysis
Inveso,atveleieiee sold fngliweriiig, 11w. 11 April 27, 2005
5.0 Existing + Project Conditions
This scenario accounts for the addition of project traffic onto the existing background traffic for
AM, PM and ADT conditions. The peak hour intersection volumes and- daily traffic volumes for
this scenario of existing + project are shown in Figure 7. The LOS calculated for the intersections
and street segments under existing plus project conditions are shown in Tables 6 and 7.
TABLE 6 BUSTING + PROJECT INTERSECTION OPERATIONS
Intersection and
Control1
Peak
Hour
Existing
1CU2 LOS3 ICU2
Existing
LOS3
+ Project
Delta impact'
1) Poinsettia Ln at AM 0.41 A 0.41 A 0.00 No
Avenida Encinas (S) PM 0.61 B 0.61 B 0.00 No
2) Poinsettia Ln at AM 0.41 A 0.41 A 0.00 No
1-5 SB Ramps (8) PM 0.53 A 0.53 A 0.00 No
Caltrans ILV AM 802 U 807 U NA NA
Caltrans ILV PM 956 U 964 U NA NA
3) Poinsettia Ln at AM 0.5 A 0.5 A 0.00 No
1-5 NB Ramps (S) PM 0.51 A 0.51 A 0.00 No
Caltrans ILV AM 802 U 807 U NA NA
Caltrans ILV PM 956 U 964 U NA NA
4) Poinsettia Ln at AM 0.53 A 0.53 A 0.00 No
Paseo Del Norte (S) PM 0.62 B 0.62 B 0.00 No
5) Paseo Del Norte at AM DNE DNE 0.13 A NA No
North Project Dwy (U) PM DNE DNE 0.13 A NA No
6) Paseo Del Norte at AM DNE DNE 0.13 A NA No
South Project Dwy (U) PM DNE DNE 0.12 A NA No
Notes: 1) Intersection Control - S: Signalized; U: Unsignalized. 2) ICU is measured as a ratio to capacity
LOS: Level of Service. Caltrans ILV: U-Under Capacity; N-Near Capacity; 0-Over Capacity.
Delta is the decrease in ICU capacity. 5) Impact due to project (yes or no). DNE: Does Not Exist
TABLE 1: EXISTING + PROJECT SEGMENT VOLUMES AND OPERATIONS
Roadway and Peak Number Direction Existing Existing + Project
Classification Hourly of and Peak Peak V/C LOS Project Peak V/C LOS
Capacity Lanes Period Volume Volume Volume
Poinsettia Lane - Major
From 1-5 1,800 3 WB-AM 1,070 .2 A 9 1,079 .2 A
to Paseo Del Norte 1,800 2 EB - PM 1,372 6.38 A 12 1,384 .38 A
From Paseo Del Norte 1,800 2 WB - AM 801 10.2 A 2 803 0.22 A
to Batiquitos Drive 1,800 2 EB - PM 1,091 A 2 1,093 . 0.3 A
Paseo Del Norte
From Poinsettia Ln 1,800 1 NB-AM 49 0.03 A 16 65 0.04 A
to Project Access 1,800 1 SB - PM 49 0.03 A 20 69 0.04 A
Notes: Peak Volumes from adjacent peak interseciton volume by direction.
Under existing plus project conditions, the study intersections and street segments were
calculated to operate at LOS B or better with the addition of project traffic. No project related
traffic impacts were calculated. Intersection LOS and ILV calculations are included in
Appendix E. Please note the ICU delta of 0.00 with the addition of project traffic in Table 5 is
not an error. The zero delta is due to the small number of project trips being added to the study
intersections.
198 Inuiiiieefiiig INC. Poinsettia Property Draft Traffic Impact Analysis
I0vestiga1ive ScieNce Sol !Eligifleering Inc. 14 April 27, 2005
6.0 Cumulative Projects
Cumulative projects in the immediate vicinity that are anticipated to use Poinsettia Lane along the
project frontage were included for analysis. Five (5) cumulative projects were identified on the City
of Carlsbad Carlsbad Tracts 1990 to Present Index Map dated September 2004. The cumulative
traffic volumes and general project locations are shown on Figure 8. Information on the individual
cumulative volumes and assignments are included in Appendix F. Summaries of the cumulative
projects are noted below with their respective and cumulative traffic generation shown in Table 8.
CT98-14 (Tabata) - A residential project with approximately 234 single family dwelling units
in the vicinity of Poinsettia Lane and Crystalline Drive. The traffic generation for this
cumulative project is calculated at 2,340 ADT with 187 AM and 234 PM peak hour trips.
CT02-08 (Tabata) - A residential project with approximately 24 multi family dwelling units in
the vicinity of Poinsettia Lane and Crystalline Drive. The traffic generation for this cumulative
project is calculated at 192 ADT with 15 AM and 19 PM peak hour trips.
CT98-05x1 (De Jong) - A residential project with approximately 28 single family dwelling
units in the vicinity of Poinsettia Lane and Black Rail Road. The traffic generation for this
cumulative project is calculated at 280 ADT with 23 AM and 28 PM peak hour trips.
CTOO-22 (Redeemer) - A residential project with approximately 12 single family dwelling units
in the vicinity of Poinsettia Lane and Black Rail Road. The traffic generation for this
cumulative project is calculated at 120 ADT with 10 AM and 12 PM peak hour trips.
Villages of La Costa - A mixed use project within Zones 10 and 11 east of El Camino Real and
south of Palomar Airport Road. The traffic generation for this cumulative project was obtained
from the Villages of La Costa traffic study, which noted 15,970 ADT with 1,450 AM and 1,640
PM peak hour trips.
cr'e.- - 0-7- , C..)?1-O ,) P/ e'i - o q'T
TABLE 8: CUMULATIVE PROJECT TRAFFIC GENERATION t'/ C01iEfi- O '4\ir&r ?f'? i1)EiT r
Cumulative Project AM PM
Rate Size & Units ADT % Split IN OUT % Split IN OUT
CT98-14 Single Family (Tabata) 10 /DU 234 DU 2340 8% 0.3 0.7 56 131 10% 0.7 0.3 164 70
CT02-08 Multi Family (Tabata) 8 /DU 24 DU 192 8% 0.2 0.8 3 12 10% 0.7 0.3 13 6
CT98-05x2 Single Family (De Jong) 10 IOU 28 DU 280 8% 0.3 0.7 7 16 10% 0.7 0.3 20 8
CTOO-22 (Redeemer) 10 /DU 12 DU 120 8% 0.3 0.7 3 7 10% 0.7 0.3 8 4
Villages of La Costa - Mixed Use _;Q920 10
Cumulative Projects Total 18900 599 1086 1250 683
Source: SANDAG Brief Guide of Vehicular Traffic Generation Rates for the San Diego Region, April 2002. DU: Dwelling Unit.
111$ Enulilesiliii, lee.. Poinsettia Property Draft Traffic Impact Analysis
Invesligafive Se/alice all!!Ingineefing, INC. 16 April 27, 2005
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8.0 Build-Out (Year 20301 Conditions
Build-Out (Year 2030) conditions were analyzed using SANDAG forecasted ADTs for the study
area roadway segments. The SANDAG 2030 ADT volumes are included in Appendix H. The
build-out intersection volumes were factored up from existing turn moves based on the increase
in ADT for each intersection approach with calculations included in Appendix L The peak hour
intersection volumes and daily traffic volumes for build-out are shown in Figure 10. To be
conservative, the project volumes were added on top of build-out volumes as shown Figure 11.
-- %- J1c&. QOt t
The LOS calculated for the intersections and strsegments are shown in Tables 11 and 12,
respectively. Intersection LOS an&LU ations are included in Appendix K without
project and Appendix L with the project.
TABLE 11: BUILD-OUT WITHOUT AND WITH PROJECT INTERSECTION OPERATIONS
Intersection and
Control'
Peak
Hour
Build-Out
ICU2 LOS3 ICU2
Build-Out + Project
LOS3 Delta4 Impact5
1) Poinsettia Ln at AM 0.66 B 0.66 B 0.00 No
Avenida Enemas (S) PM 0.88 D 0.89 0 0.01 No
2) Poinsettia Ln at AM 0.52 A 0.52 A 0.00 No
1-5 SB Ramps (S) PM 0.70 B 0.70 B 0.00 No
Caltrans ILV AM 1,070 U 1,074 U NA NA
Caltrans ILV PM 1,335 N 1,342 N NA NA
3) Poinsettia Ln at AM 0.61 B 0.62 B 0.01 No
1-5 NB Ramps (S) PM 0.63 B 0.63 B 0.00 No
Caltrans ILV AM 1,070 U 1,074 U NA NA
Caltrans ILV PM 1,335 N 1,342 N NA NA
4) Poinsettia Ln at AM 0.68 B 0.69 B 0.01 Na
Paseo Del Norte (5) PM 0.79 C 0.79 C 0.00 No
5) Paseo Del Norte at AM ONE ONE 0.13 A NA No
North Project Dwy (U) PM ONE DNE 0.14 A NA No
6) Paseo Del Norte at AM ONE DNE 0.14 A NA No
South Project Owv (U) PM DNE ONE 0.13 A NA No
Notes: 1) Intersection Control - S: Signalized; U: Unsignalized. 2) ICU is measured as a ratio to capacity.
LOS: Level of Service. Caltrans ILV: U-Under Capacity; N-Near Capacity; 0-Over Capacity.
Delta is the decrease in ICU capacity. 5) Impact due to project (yes or no). ONE: Does Not Exist
lflSliigiiiee,ing, INC. Poinsettia Property Draft Traffic Impact Analysis
IflVOS9ga1ive Science anilleg! sf/eq 11W. 20 April 27, 2005
TABLE 12: BUILD-OUT WITHOUT AND WITH PROJECT SEGMENT VOLUMES AND OPERATIONS
Roadway and Peak Number Direction Build-Out Build-Out + Project
Classification Hourly of and Peak Peak V/C LOS Project Peak V/C LOS
Capacity Lanes Period Volume Volume Volume
Poinsettia Lane - Major
From 1-5 1,800 3 WB-AM 1,520 . 8 A 9 1,529 0.2 A
to Paseo Del Norte 1,800 2 EB - PM 1,850 0.51 A 12 1,862 0.52 A
From Paseo Del Norte 1,800 2 WB-AM 1,190 0.33 A 2 1,192 0.33 A
to Batiquitos Drive 1,800 2 EB- PM 1,270 .35, A 2 1,272 .35 A
Paseo Del Norte
From Poinsettia Ln 1,800 1 NB -AM 60 0.03 A 16 76 0.04 A
to Project Access 1,800 1 SB - PM 70 0.04 A 20 90 0.05 A
Notes: Peak Volumes from adjacent peak interseciton volume by direction.
Under build-out (Year 2030) conditions, the study intersections and street segments were calculated
to operate at LOS D or better. Intersection LOS and ILV calculations are included in Appendix J.
Under build-out (Year 2030) plus project conditions, the study intersections and street segments
were calculated to operate at LOS D or better with the addition of project traffic. No project related
traffic impacts were calculated. Intersection LOS and ILV calculations are included in
Appendix K. -
I]
flLOS liigiiieerlag 11w. Poinsettia Property Draft Traffic Impact Analysis
InvesIIgaai'e Se/eea sill Eiigiiieefl#I 11W. 23 April 27, 2005
L . . 1 9.0 Conclusion
The proposed project will consist of 29 detached residential dwelling units on the southwest
corner of Poinsettia Lane at Paseo Del Norte. The site is currently vacant. Based on SANDAG
traffic generation rates, the project is calculated to generate 290 ADT with 23 AM peak hour
trips and 29 PM peak hour trips.
Proj e ss roposed through two new driveways. The driveways will be T-intersections with
Pei-1tNorte. The north driveway will be located approximately 200 feet south of Poinsettia.
Lane (centerline to centerline). The south driveway will be located approximately 235 feet south of
the north driveway (centerline to centerline). This falls within the minimum T-intersection spacing
per the City of Carlsbad Street Design Criteria.
A queuing analysis was performed for the south leg of Poinsettia Lane and...Eallorte with
buildout volumes (Year 2030) to determine if vehicles would queue back and block the entrance
to the north driveway on Paseo Del Norte. The queuing analysis was prepared using Synchro 6.0
(Trafficware Corporation, 2003). Synchro reports a vehicle queue of 56 feet in the AM period
and 45 feet in the PM period for the northbound left turn approach at Poinsettia Lane/Paseo Del
Norte. Based on the Synchro output, vehicles queuing on the south leg of Poinsettia Lane at
Paseo Del Norte will not block the proposed driveway. It is recommended that the north
driveway be allowed full movements unless future safety issues arise.
cumulative projects were identified on the City of Carlsbad Carlsbad Tracts 1990 to
Present Index Map dated September 2004 and were included in this analysis. The cumulative
projects included:
CT98-14 (Tabata) - A residential project with approximately 234 single family dwelling
units in the vicinity of Poinsettia Lane and Crystalline Drive.
CT02-08 (Tabata) - A residential project with approximately 24 multi family dwelling
units in the vicinity of Poinsettia Lane and Crystalline Drive.
CT98-05x1 . (De Jong) - A residential project with approximately 28 single family
dwelling units in the vicinity of Poinsettia Lane and Black Rail Road.
CTOO-22 (Redeemer) - A residential project with approximately 12 single family
El
dwelling units in the vicinity of Poinsettia Lane and Black Rail Road.
Villages of La Costa - A mixed use project within Zones 10 and 11 east of El Camino
Real and south of Palomar Airport Road.
L7J 'JC(.
Intersection and roadway segment analysis were conducted for five (5) scenarios, which included
Existing, Existing
+ Cumulative, Existing + Cumulative + Project, Build Out (Year 2030) without
project, and Build-Out (Year 2030) with project. The adjacent freeway mainline and on-ramps
were not analyzed because the project adds less project trips than the required threshold for
analysis. The operational findings are summarized below by scenario:
1)Under existing conditions, all study intersections and Street segments were calculated to
US Engiaee,in.q, 11w. Poinsettia Property Draft Traffic Impact Analysis
Iiives1igai!vè Se!eaea sill Eagiiiaedog, INC. 24 April 27, 2005
operate better.
2) Under existing plus projeacQnditions, the study intersections and street segments were
calculated to operate a OS or better with the addition of project traffic. No project
related traffic impacts w
3) Under Under existing plus project plus cumulativ itions, the study intersections and street
segments were calculated to operate OS r better with the addition of cumulative
traffic.
Under build-out (Year 2030) without projecLconditions, the study intersections and street
segments were calculated to operate a S D r better.
Under build-out (Year 2030) with projectpn4tions, the study intersections and street
segments were calculated to operate at OSO or better with the addition of project
traffic. No project related traffic impactswere calculated.
It is recommended applicant install stop signs on the project exit points to the satisfaction of
the City
198 Eflhlllleeflhhl, 11W. Poinsettia Property Draft Traffic Impact Analysis
II1L'es!ig.lIivs SCISIWI? SRI!EDh1iI1DCfiIII, lile. 25 April 27, 2005