Interstate 495 & Route 9 Interchange Improvement Study

Study Advisory Group Meeting #3

Februaryy24 ,,2012

MassDOT

Agenda

•Recap of SAG Meeting #2

•Future (2035) Conditions

•Alt ti f C id tiAlternatives for Consideration •Next Stepps/Discussion

MassDOT

Meeting #2 Recap – Summary of Issues

• High Peak Period Commuter Traffic Volumes

• Existing Roadway Geometry is Substandard

• • Accident Accident Rates Rates are are HighHigh

• Congestion Reduces Mobility

• Poor Pedestrian/Bike Facilities

• Available commercial and industrial spacespace exceeds prp ojojecteddemand

• Potential demand for additional retail development

MassDOT

Future (2035) Traffic/Roadway Conditions

•Traffic Volumes

•Capacity Analysis Results

• IIssues

MassDOT

Traffic Volume Projection - 2035 No-Build • CTPS Regional Model Forecasts

– Uses year 2035 Population and employment projections

– Land Land UseUse ssummarized ummarized inin TTraraff ffic ic AnalysisAnalysis ZoneZones

– 4-Step Model Process – Trip Generation, Mode Split, Distribution, and Assiggnment

– Roadway peak volumes are converted to turning movements at intersections

MassDOT

I-495 Peak Hour Traffic Volume Growth

2004 2011 2035

North of Route 9 AM 9,700 8,900 10,350

North of Route 9 PM 9,650 8,550 9,900

South of Route 9 AM 9,850 9,000 10,700

South of Route 9 PM 9,850 9,190 10,600

South of I-90 AM 9South of I -90 AM 9,990 9990 9,210 11210 11,000000

South of I-90 PM 10,100 9,620 11,350

MassDOT

Interchange Peak Hour Traffic Volume Growth

2004 2011 20352004 2011 2035

I‐495‐Route 9 AM ,5 950 6,810 8,050 , , ,

I‐495‐Route 9 PM 5,800 6,590 7,600

I‐495/‐I‐90 AM 6,650 6,690 7,900

I‐495/‐I‐90 PM 6,550 6,830 7,450

MassDOT

AM Peak Hour Interchange Traffic Volumes

Highest Traffic Volumes

• II-495495 NNortthbhboundd

• Rt. 9 Eastbound / WWeestboundstbound

• I-495 Northbound to

II-9090 EastboundEastbound

MassDOT

PM Peak Hour Interchange Traffic Volumes

Highest Traffic Volumes

• II-495495 SSoutthbhb oundd

• Rt. 9 Eastbound / WWeestboundstbound

• I-90 Westbound

RampRamp

MassDOT

AM Peak Hour Route 9 (East)

• High Rt. 9 Eastbound VolV lumes

• High Turning

Movements atat MovementsEMC

MassDOT

PM Peak Hour Route 9 (East)

• High Rt. 9 We stbound VolV lumes

• High EMC VoVolluummee to to RRtt . 9Westbound

MassDOT

AM Peak Hour Route 9 (West)

MassDOT

• High Rt. 9 We stbound VolV lumes

• Heavy Connecto rRdRd . SouthbounSouthboundLeft Turn

PM Peak Hour – Route 9 (West) • High Rt. 9

Eastbound VolV lumes

MassDOT

2035 Roadway Improvement Assumptions EMC Planned Improvements at Crystal Pond RoadEMC Planned Improvements at Crystal Pond Road

MassDOT

2035 Peak Hour Level of Service Route Route 99 aat t II-495 495 InterchangeInterchange

Interchange Movement Peak Hour LOS

Route 9 WB on-ramp from I-495 SB (merge) AM/PM E/D

I-495 SB off-ramp to Route 9 WB (diverge) AM/PM D/D

I-495 SB at Route 9 ramps (weave) PM D

I-495 NB off-ramp to Route 9 EB (diverge) AM E

I-495 SB on-ramp from Route 9 EB (merge) PM D

Route 9 WB off-ramp to I-495 NB (diverge) PM D

I-495 NB on-ramp from Route 9 WB (merge)I 495 NB on ramp from Route 9 WB (merge) PM DD I-495 NB at Route 9 ramps (weave) AM/PM E/D

MassDOT

2035 Peak Hour Level of Service I I-90 90 atat II-495 495 InterchangeInterchange

Interchange Movement Peak Hour LOS

I-495 NB to I-90 (diverge) AM/PM F/D

I-90 to I-495 NB (merge) AM E

I-495 SB to I-90 (diverge) AM/PM F/D

I-90 to I-495 SB (merge) PM F

MassDOT

2035 Peak Hour Level of Service Route Route 99 (East) Signalized (East) Signalized Intersectionss

AM

Intersection

Intersection PM

Computer Drive and Route 9 Ramps C A

Connector Road and Research Drive D D

Research Drive and Route 9 RampsResearch Drive and Route 9 Ramps BB DD

Connector Road/Computer Drive F F

Research Drive/Friberg Parkway D F

MassDOT

Peak Hour Level of Service 2035 2035 RouteRoute 9 9 (W(W est)est) SSignalized ignalized Intersectionons Intersecti

Intersection AM PM

R t 9 EB/C li D i Route 9 EB/Coslin Drive F F FF Route 9 EB/#352 Driveway C C Route 9 EB/ Crystal Pond Road* y C BRoute 9 EB/ Deerfoot Road E E Route 9 WB/ Deerfoot Road F D Route 9 WB/# 325 Driveway Route 9 WB/# 325 Driveway D D FF Route 9 WB/Flagg Road F F Route 9 WB/Park Central Drive F F * Assumes future improvements Note: The intersection of Washington Street with Route 9 EB is assumed to be eliminated in the future as part of the proposed EMC development.

MassDOT

Summary of Traffic Issues

• I-495 Traffic Volumes Increase 10-20% • Rt.9 Traffic Volumes Increase 10% • • TTrafraffic fic Increases Increases Degrade Degrade Operations Operations at at MostMost

Locations

MassDOT

Future Demographics and Land Use • Population

• Employment

• Land UL d seU

MassDOT

Population and Employment Growth 2009 to 2035 Town 2009 2035 Percent Change PopulationPopulation Southborough 9,584 10,868 13% Westborough 18,468 21,110 14% Employment Southborough 6,590 7,688 16% Westborough 22,749 27,690 21%

MassDOT

Alternatives for Consideration

•Traffic/Roadway

•Transit/TDM

••Pedestrian/Pedestrian/ BikeBike

MassDOT

Traffic/Roadway Alternative Types

•Ramp Improvements

•Driveway Consolidation/Access Management

••CollectorCollector-Distributor Distributor RoadRoad

• Interchange Improvements

• ITS

••AlternateAlternate TToll oll Collection Collection TTechnologyechnology

MassDOT

Interchange Ramp Improvements I-495 at Rt. 9

MassDOT

Rt. 9 Improvements at I-495 Interchange West

MassDOT

Rt. 9 Improvements at I-495 Interchange East

MassDOT

I-495 at I 90 Interchange Ramp Improvements

MassDOT

Driveway Consolidation

EMC Southborough Executive Place

Unisource Distribution

Warehouse

Law Office

Gulf Station

Cumberland Farms

Auto

Clark University Office

Wendy s Volvo

Beer & Wine

9

C O S L I N DR

BAN

TRY

RD

TARA RD

C O S L I N

W A Y

FLAG

G R

D

W A S H I N G T O N ST

C R Y S T A L P O N D R D

T U R N P I K E R D

MassDOT

Collector-Distributor Road Existing I-495

0 100500 10050

Feet

CD Road Alternative Shift Mainline

to an

i

Medi

Convert M i l

to Median

Mainline to CD Road

50 0100

No Increase in Overall

ROW Width

0 10050

Feet

MassDOT

Collector-Distributor Road Options

• CD Road – Short Option

– Focused on Route 9

– 1.25 miles long

• CD Road – Long Option

– Extends to south of I-90

– 2.75 miles long

MassDOT

I-90/I-495 Interchange Improvement(CMRPC I-495 Study)

MassDOT

Transit/TDM Alternatives

• WRTA/MWRTA Limited Stop Bus Connection along Route Route 99

• Shuttle Service from Westborough and Southborough CommuterCommuter Rail Rail StationStations

• Expand TMA Participation

• Park & Ride Lots

MassDOT

Preliminary Transit Alternative Concept 8 5

Westborough Technology

Park

9

Westborough

EMC9

Business Park

8 5

R t 85 R t M lb h H ki t (b th ) N

Route 85 Route Marlborough-Hopkinton (by others) I-495/MetroWest Development Compact Priority Development Area

MassDOT

Pedestrian/Bike Improvements

• Improve Pedestrian Sidewalks and Crosswalks • Implement Bike-Sharing program

MassDOT

Next Steps

• Alternatives Analysis

• Next SAG Meeting

MassDOT

Schedule and SAG Meetings

TASK MEETING DATE 1. Study Area September 2011

2. Existing Conditions & December 2011 Issues EvaluationIssues Evaluation

3. Future Conditions & February 2012 AlternativesAlternatives

Development

June 20124.

Alternatives Analyysis September 2012

5. Recommendations

December 2012

6. Fi an l Repoeport

MassDOT

Discussion

MassDOT