Fort Benning Patriot’s Walk Development, Columbus, …s Walk Traffic Study Report.pdf · Fort...

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Draft Traffic Impact Study Fort Benning Patriot’s Walk Development, Columbus, Georgia Prepared by: Jordan Jones and Goulding, Inc Norcross, Georgia May 2010

Transcript of Fort Benning Patriot’s Walk Development, Columbus, …s Walk Traffic Study Report.pdf · Fort...

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Draft Traffic Impact Study

Fort Benning Patriot’s Walk Development, Columbus, Georgia Prepared by: Jordan Jones and Goulding, Inc Norcross, Georgia May 2010

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TABLE OF CONTENTS Page

1.0 INTRODUCTION ...............................................................................................................1

2.0 STUDY AREA DETERMINATION ..................................................................................1

3.0 EXISTING TRAFFIC CONDITIONS ................................................................................1

4.0 FUTURE NO-BUILD (BACKGROUND) TRAFFIC CONDITIONS...............................6

5.0 FUTURE BUILD TRAFFIC CONDITIONS......................................................................6 5.1 Project Access and Site Layout................................................................................9 5.2 Trip Generation........................................................................................................9 5.3 Trip Distribution and Assignment ...........................................................................9

6.0 LEVEL OF SERVICE ANALYSIS ..................................................................................21 6.1 Existing (2010) Level-of-Service ..........................................................................21 6.2 Future (2020) No-Build Level-of-Service .............................................................21 6.3 Future (2020) Build Level-of-Service ...................................................................22

7.0 CONCLUSION/RECOMMENDATIONS........................................................................25 APPENDIX

Capacity Analyses - Existing, No-Build (2020) and Build (2020) Conditions 24 Hour Average Daily Traffic volumes

Internal Capture Worksheets

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FIGURES Page

Figure 1: Project Location Map ..........................................................................................................2

Figure 2: Pariot’s Walk Development Site Plan .................................................................................3

Figure 3: Existing (2010) Peak Hour Conditions ...............................................................................4

Figure 4: existing (2010) Average Daily Traffic ...............................................................................5

Figure 5: 2020 No-build Peak Hour Conditions .................................................................................7

Figure 6: 2020 No-Build Average Daily Traffic ................................................................................8

Figure 7: Overall regional Trip Distribution ...................................................................................12

Figure 8: Hotel Trip Distribution ....................................................................................................14

Figure 9: Multi Family (MF) Trip Distribution ..............................................................................15

Figure 10: Retail. Office, Restaurant, and Apartment Trip Distribution ..........................................16

Figure 11: 2020 Build Peak Hour Conditions.....................................................................................17

Figure 12: Total Pass-By Trips ...........................................................................................................18

Figure 13: 2020 Project Trips .............................................................................................................19

Figure 14: 2020 Build Average Daily Traffic.....................................................................................20

Figure 15: Recommended Improvements ..........................................................................................24

LIST OF TABLES Page

Table 1: Traffic Growth Projections..................................................................................................6

Table 2-4: Patriot’s Walk Development Trip Generation............................................................. 10-11

Table 5: Existing (2010) Intersection LOS Results.........................................................................21

Table 6: Future (2020) No-Build Intersection LOS Results (Existing Roadway and Intersection Configuration) ...................................................................................................................22

Table 7: Future (2020) Build Intersection LOS Results (Existing Roadway and Intersection Configuration) ...................................................................................................................22

Table 8: Future (2020) Build Intersection LOS Results Intersections)................................23

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1.0 INTRODUCTION

This report has been prepared for submittal to City of Columbus to evaluate the traffic impact that the

proposed Fort Benning Patriot’s Walk Development will have on the transportation network surrounding

the site. The proposed development is located between South Lumpkin Road and Fort Benning Blvd in

Columbus, Georgia. Figure 1 presents the location map for the development. The proposed development

will consist of 56,000 square feet of retail space, approximately 83,900 square feet of office space, a 125 -

room hotel, 581 apartments, and 18,000 square feet of restaurant. Figure 2 presents the site plan with

these land uses. The development is expected to reach full build-out within 10 years. For the purposes of

this report, 2020 was used as the full build-out year in our analyses. This report summarizes the data

collection, analysis of traffic impacts, proposed access, as well as conclusions and recommendations from

the analysis.

2.0 STUDY AREA DETERMINATION

In order to assess the traffic impact that this project would have on the surrounding roadway network, the

study area includes Fort Benning Road and South Lumpkin Road. With the proposed development, seven

intersections will be created with the site entrance driveways. These driveway intersections will be

analyzed in this report.

3.0 EXISTING TRAFFIC CONDITIONS

In early May 2010, 24 hour vehicle classification counts were conducted for three weekdays at the

following roads in the study area. The existing peak hour traffic is shown in Figure 2 and the raw counts

are included in the appendix.

• Fort Benning Road – Northbound

• Fort Benning Road – Southbound

• South Lumpkin Road

The existing peak hour and ADT traffic is presented in Figures 3 and 4. The classification counts reveal a

truck percentage of 8% on South Lumpkin Road and 4.5 % on Fort Benning Road. South Lumpkin Road

is a two-lane urban minor arterial and Fort Benning Road is a four-lane divided urban principal arterial.

There are no signalized or unsignalized intersections immediately adjacent to the proposed development.

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Figure 1. Project Location Map

Proposed Patriot’s Walk Development

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Figure 2. Patriot’s Walk Development Site Plan

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4.0 FUTURE NO-BUILD (BACKGROUND) TRAFFIC CONDITIONS

Future traffic volumes were developed for the 2020 No-Build (background) condition. The No-Build

condition is defined as the traffic on the roadway network in the future year absent the construction and

opening of the proposed project. As per the traffic growth projections, the roadway segments in the study

area experienced -1.2% growth from 2003 to 2008. Table 1 presents the traffic growth projections in the

study area.

TABLE1. Traffic Growth Projections (2003 - 2008)

TC Station County 2003 2004 2005 2006 2007 2008 Growth

216 Muscogee 31,755 37,107 31,110 38,300 32,140 31,640 -0.7% 218 Muscogee 25,680 26,056 19,190 23,410 18,530 22,980 -3.9% 374 Muscogee 6,979 7,205 7,160 7,220 6,700 6,530 -1.5% 372 Muscogee 5,210 5,648 5,340 5,720 5,630 5,490 0.9% 221 Muscogee 25,164 26,103 20,750 31,650 26,440 26,030 1.8% 141 Muscogee 16,025 16,308 16,470 15,740 14,510 14,150 -2.9% 138 Muscogee 9,099 14,480 13,220 13,600 13,900 13,560 5.6% 105 Muscogee 8,694 8,846 8,650 7,120 6,460 6,370 -7.4% 223 Muscogee 23,914 33,413 22,880 28,520 24,730 22,130 -3.0% 107 Muscogee 9,013 9,172 9,260 8,640 8,110 8,820 -1.5% 109 Muscogee 10,608 13,478 8,420 11,710 11,320 11,040 0.0%

Total 172,141 197,816 162,450 191,630 168,470 168,740 -1.2% Source: Georgia Department of transportation STARS data

However, as per the Base Realignment and Closure (BRAC) program, the Fort Benning base is expected

to grow and will add 28,000 additional population by 2011. This growth includes military service

members (11,831), government civilians (4,851), and contractors (11,406). Considering the anticipated

growth of the base, the existing 2010 peak hour and 24-hour traffic volumes were increased at 1.5% per

year for 10 years to account for background traffic growth. Under No-Build conditions, the truck

percentages are not expected to change significantly. The 2020 No-Build peak hour and Average Daily

Traffic (ADT) is presented in Figures 5 and 6.

5.0 FUTURE BUILD TRAFFIC CONDITIONS

Future Build traffic conditions are defined as the future traffic conditions expected with the additional

traffic generated by the Patriot’s Walk development and the distribution and assignment of this traffic

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onto the study roadway network. With this development comprised of residential, office, retail land uses,

it is expected that this site will not generate significant truck volumes.

5.1 Project Access and Site Layout

Access to the proposed development would be provided by two driveways along Fort Benning Road and

three driveways on the South Lumpkin Road.

5.2 Trip Generation

Traffic for the proposed development was calculated using equations contained in the Institute of

Transportation Engineers’ (ITE) Trip Generation Manual, Eighth Edition, and the ITE Trip Generation

Handbook, 2004. Tables 2 through 4 presents the trip generation based on full site build-out for daily and

peak hour conditions.

Since the Patriot’s Walk development is a site with a mix of land uses, there lies the potential for

interaction between these uses within the site. Trips between land uses within the site have no adverse

effect on the external roadway network. Internal capture reductions were applied to trips between the

residential, office and retail portions of the development. The internal capture worksheets are included in

the Appendix.

Tables 3 and 4 present the total of all internal and external trips generated by the development. It then

subtracts out the internally captured trips and presents the net external trips that would be generated by

the proposed development. These trips represent the vehicle trips that would utilize the existing roadway

network to travel to and from the development.

5.3 Trip Distribution and Assignment

In order to accurately predict future traffic conditions, it is important to understand the existing and future

traffic patterns within the study area. Figure 7 presents the distribution of traffic utilizing Fort Benning

Road and South Lumpkin Road. This traffic distribution is determined based on the proximity of the Fort

Benning base, and also the large residential development in the northern part of the study area. This

figure shows the expected trip distribution for project trips traveling to or from the Patriot’s Walk

development in the peak hours.

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Table 2: Patriot’s Walk Development Trip Generation - Hotel

DAILY TOTAL AM PM INTENSITY

LAND USE ITE

UNITS SQ. FT (1000)

WEEKDAY TOTAL AM PM ENTER EXIT ENTER EXIT

Hotel 310 125 746 68 417 37 31 242 175

Table 3: Patriot’s Walk Development Trip Generation – Multi Family

AM PM INTENSITY

LAND USE ITE

UNITS SQ. FT (1000)

WEEKDAY TOTAL ENTER EXIT ENTER EXIT

Multi Family 220 535 3,366 84 207 205 131 Gross Total Trips 3,366 84 207 205 131

Internal Capture (Office-Residential-Retail) 410 0 0 25 16 New External Trips 2,956 84 207 180 115

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Table 4: Patriot’s Walk Development Trip Generation – Mixed Land Uses (Retail, Restaurant, Office and Residential)

DAILY TOTAL AM PM INTENSITY

LAND USE ITE

UNITS SQ. FT (1000)

WEEKDAY TOTAL AM PM ENTER EXIT ENTER EXIT

Apartments 220 51 433 30 46 9 21 28 18 Retail 820 56 4,659 109 431 67 43 211 220 Office 710 84 1,165 163 173 143 20 29 143

Restaurant 932, 933 18 5,238 573 554 298 275 288 266 Gross Total Trips 6,257 302 650 219 84 269 381

Internal Capture (Office-Residential-Retail) 12.2% 763 0 79 0 0 33 46 New External Trips 5,494 302 571 219 84 236 335

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Once the trip distribution was developed, the project traffic needed to be assigned to the roadway system.

In order to assign the project trips to the development driveways, the trip assignment percentages

presented previously were utilized for multi family and other mixed use development such as Retail,

Office, Restaurant and Apartment land uses.

For the hotel land use, trips are assumed to use Fort Benning Road southbound as the proposed hotel is

nearer to the driveway 1 on the project site. It is also assumed 50% of the trips come from the Fort

Benning Base from the south and 50% from the north. Pass-by trips are predicted to have the site as a

stop on their way to their final destination and they exit the site in the same direction from which they

enter the site. Pass-by trips are calculated for retail, and restaurant land uses and are subtracted from the

new external trips expected to be generated by the proposed development. Pass-by trips are calculated

using the ITE Trip Generation Handbook, 2004

The final step in the distribution and assignment process was to assign the external project trips to the

entire roadway network. This was accomplished using the trip distribution percentages previously

developed. Figures 8, 9, and 10 present the hotel, multi-family, and retail, restaurant, office, and

apartment land uses’ trip distributions. Figure 11 present the 2020 AM and PM and Daily Build

condition traffic volumes. Figure 12 shows the total pass-by trips and Figure 13 shows the 2020 project

trips from the proposed development. Figure 14 shows the 2020 build average daily traffic.

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6.0 LEVEL OF SERVICE ANALYSIS

6.1 Existing (2010) Level-of-Service

Level-of-service (LOS) determinations were made for the existing weekday AM and PM peak hours for

the surrounding roadways using HCS + software Multi lane and two-lane analysis modules as there were

no traffic controlled intersections in the study area. Level-of-service (LOS) is used to describe the

operating characteristics of a road segment or intersection in relation to its capacity. LOS is defined as a

qualitative measure that describes operational conditions and motorists perceptions within a traffic

stream. The Highway Capacity Manual defines six levels of service, LOS A through LOS F, with A

being the best and F the worst. Copies of the roadway capacity analyses are included in the Appendix.

Table 5 presents the results of the LOS analysis for the roadways.

Table 5: Existing (2010) Roadway LOS Results

AM Peak PM Peak Roadway Density (Sec) LOS Density (Sec) LOS

Fort Benning Road - Northbound 10.5 A 2.9 A Fort Benning Road - Southbound 2.3 A 10.5 A South Lumpkin Road* 0.22* B 0.16* B Note: * - For two-lane roadway V/C Ratio is shown.

As presented in Table 5, under existing conditions, the study area roadways operate at an acceptable level

of service.

6.2 Future (2020) No-Build Level-of-Service

Level-of-service (LOS) determinations were made for the 2020 no-build weekday AM and PM peak

hours for the surrounding roadways using HCS + software Multi lane and two-lane analysis modules as

there were no traffic controlled intersections in the study area. This No-Build scenario assumes that no

changes will be made to the existing roadways or intersections.

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Table 6: No-Build (2020) Roadway LOS Results

AM Peak PM Peak Roadway

Density (Sec) LOS Density (Sec) LOS

Fort Benning Road - Northbound 13.8 B 3.3 A Fort Benning Road - Southbound 2.7 A 12.2 B South Lumpkin Road* 0.26* C 0.18* B Note: * - For two-lane roadway V/C Ratio is shown.

The results of the No-Build condition analysis reveal that under the existing roadway configurations,

study area roadways would operating at acceptable levels of service in 2020.

6.3 Future (2020) Build Level-of-Service

Level-of-service (LOS) determinations were made for the future Build AM and PM peak hours at all

study intersections and development entrances using SYNCHRO Professional, Version 6.0 and HCS+

Software. The Build scenario assumes the full build-out of the Patriot’s Walk development. Table 7

presents the results of the LOS analysis. This Build scenario assumes that no changes will be made to the

existing roadways. All intersections were assumed to be unsignalized.

Table 7: Future (2020) Build Intersection LOS Results

AM Peak PM Peak Intersection Delay (Sec) LOS Delay (Sec) LOS Fort Benning Road Northbound and Driveway 1* 10.3 B 15.3 C Fort Benning Road Northbound and Driveway 2* 10.9 B 21.5 C Fort Benning Road Southbound and Driveway 2* 44.3 E 14.6 B Fort Benning Road Southbound and Driveway 1* 38.9 E 16.5 C South Lumpkin Road and Driveway 3* 14.0 B 13.4 B South Lumpkin Road and Driveway 4* 13.5 B 13.2 B South Lumpkin Road and Driveway 5* 13.6 B 12.9 B Note: * - Unsignalized Intersection (delay value indicates side street delay)

The results of the 2020 Build condition analysis under existing roadway and intersection configurations

reveal that all intersections except the Fort Benning Southbound Road intersections of the project site will

operate at LOS ‘C’ and better without improvements to the existing roadway and intersections. The Fort

Benning Southbound road intersections at the north and south driveways to the project site will operate at

a failing LOS ‘E’.

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Table 8 presents the results of the 2020 Build condition with the improvements to the intersections such

as providing turn lanes and signalization of Fort Benning Southbound Road intersections.

Table 8: Future (2020) Build Intersection LOS Results (Improved with traffic controls at Fort Benning Road Southbound Intersections)

AM Peak PM Peak Intersection Delay (Sec) LOS Delay (Sec) LOS Fort Benning Road Northbound and Driveway 1* 10.3 B 15.3 C Fort Benning Road Northbound and Driveway 2* 10.9 B 21.5 C Fort Benning Road Southbound and Driveway 2 14.5 B 12.5 B Fort Benning Road Southbound and Driveway 1 6.5 A 13.4 B South Lumpkin Road and Driveway 3* 14.0 B 13.4 B South Lumpkin Road and Driveway 4* 13.5 B 13.2 B South Lumpkin Road and Driveway 5* 13.6 B 12.9 B Note: * - Unsignalized Intersection (delay value indicates side street delay)

This analysis shows that with the proposed improvement as well as the addition of traffic signals at

Driveway 1 and 2 of the Fort Benning Road southbound, all intersections in the 2020 Build condition will

operate at acceptable LOS ‘C’ or better. Fort Benning Southbound Road driveways 1 and 2 would need

to be signalized to operate at acceptable LOS ‘C’ in build year (2020). Figure 15 shows the

recommended laneage and traffic control for the proposed development.

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7.0 CONCLUSION/RECOMMENDATIONS

The proposed Patriot’s Walk development will consist of 586 residential units, approximately 56,000

square feet of retail space, approximately 84,000 square feet of office space, and 18,000 square feet of

restaurant space. The proposed development will be built-out by 2020 and will have three entrances

located on South Lumpkin Road and two entrances on Fort Benning Road. South Lumpkin Road is

currently a two-lane roadway and Fort Benning Road is four-lane divided roadway with no signalized

intersections.

Intersection capacity analyses were conducted for existing and future No-Build and Build traffic

conditions at all intersections within the study area. The results of the capacity analyses indicate that the

roadways in the study area operating at LOS ‘C’ and better in the peak periods under existing and 2020

no-build conditions.

The proposed development is expected to add 9,196 weekday vehicle trips to the roadway network. The

traffic volumes generated by the development will require that its driveways on Fort Benning Road

Southbound be signalized by 2020 in order to operate at acceptable LOS ‘C’. The roadway and

intersection improvements recommended for acceptable intersection operation by 2020 are as follows:

Intersection Traffic Control and Lane Recommendations:

1. Fort Benning Road Northbound @ Driveway 1:

a. Addition of a northbound left turn lane

b. Addition of a eastbound left turn lane

2. Fort Benning Road Northbound @ Driveway 2:

a. Addition of a northbound left turn lane

b. Addition of a eastbound left turn lane

3. Fort Benning Road Southbound @ Driveway 2:

a. Signalize intersection

b. Addition of a southbound right turn lane

c. Addition of a eastbound right turn lane

4. Fort Benning Road Southbound @ Driveway 1:

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a. Signalize intersection

b. Addition of a southbound right turn lane

c. Addition of a eastbound right turn lane

5. South Lumpkin Road @ Driveway 3:

a. Addition of a northbound right turn lane

b. Addition of a southbound left turn lane

c. Addition of a westbound right turn lane

6. South Lumpkin Road @ Driveway 4:

a. Addition of a northbound right turn lane

b. Addition of a southbound left turn lane

c. Addition of a westbound right turn lane

7. South Lumpkin Road @ Driveway 5:

a. Addition of a northbound right turn lane

b. Addition of a southbound left turn lane

c. Addition of a westbound right turn lane