12-06-05 i-91 pac meeting materials

7/31/2019 12-06-05 I-91 PAC Meeting Materials

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I-91 Interchange 19 ImprovementsNorthampton, MAI-91 Interchange 19 ImprovementsNorthampton, MA

Project Advisory Committee

ee ng

June 5, 2012


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Meeting AgendaMeeting Agenda

Review of Alternatives

Discussion of Evaluation Matrix

Discussion of Public Information Meeting

I-91 Interchange 19June 5, 2012


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Concept 13Concept 13

Concept 13 Intersection & Ramp

Improvements

Modified to add additional WB left turn laneonto SB on-ramp

Modified to add additional NB through laneto Damon Road from NB off-ramp

Left turn lane extended under bridge byrelocating sidewalk or replacing thestructures


Improves on and off-ramps


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Concept 13Concept 13

Concept 13 Intersection & Ramp

Improvements

Modified to add additional WB left turn laneonto SB on-ramp

Modified to add additional NB through laneto Damon Road from NB off-ramp





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Concept 13AConcept 13A

Concept 13A Intersection & Ramp

Improvements with Roundabout

Adds additional WB left turn lane onto SBon-ramp

Converts Damon Road/Route 9 intersectionto a roundabout





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Concept 13BConcept 13B

Concept 13B Ramp Improvements

with Double Roundabout

Converts Damon Road/Route 9 & Route9/SB On-Ramp intersections to roundabouts




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Concept 13BConcept 13B

Concept 13B Ramp Improvements

with Double Roundabout

Converts Damon Road/Route 9 & Route9/SB On-Ramp intersections to roundabouts




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Concept 13CConcept 13C

Concept 13C Ramp Improvements

with Roundabout at SB On-Ramp

Converts Route 9/SB On-Rampintersections to roundabout

Improves on and off-rampsAdds additional NB through lane from NBOff-Ramp to Damon Road



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Click to edit Master

title styleClick to edit Master

text styles

Second level

Third levelFourth level

Fifth level

SAFETY

Alternatives

No Build C13 C13A C13B C13C

Rating Discussion Rating Discussion Rating Discussion Rating Discussion Rating Discussion

Crash Rates No ChangeReduced Delays at

Route 9 intersections willlikely reduce crashes

Reduced Delays at Route 9intersections will likely

reduce crashes.Roundabout will likelyreduce severity andfrequency of crashes.

Reduced Delays at Route9 intersections will likely

reduce crashes.Roundabouts will likelyreduce severity andfrequency of crashes.

Reduced Delays atRoute 9 intersectionswill likely reduce

crashes.Roundabout at SBOn-Ramp will reduceseverity of crashes.

Roundabout is more difficultto maneuver than asignalized intersection with

Roundabout is moredifficult to maneuver thana signalized intersectionwith emergency pre-emption but substantial

Roundabout is moredifficult to maneuverthan a si nalized

I-91 Interchange 19June 5, 2012I-91 Interchange 19June 5, 2012

AccessNo Change No Change

emergency pre-emption butsubstantial queue

reductions facilitateemergency vehiclepassage.

queue reductions facilitateemergency vehicle

passage. Roundabout ismore difficult to maneuverthan a signalizedintersection withemergency pre-emption.

intersection withemergency pre-emption.

Traffic Calming No Change

No Change as currentlydeveloped however thereis a possibility to addsome traffic calmingelements (street trees,

median, etc.) if thisalternative advances intodesign.

A roundabout at DamonRd/Route 9 intersection willforce vehicles to reducespeed when entering theroundabout. Theroundabout will also serve

as a visual signal to driversof a change in roadwaycharacter.

A roundabout at DamonRd./Route 9 and 2nd atRoute 9/SB On-ramp willmagnify the traffic calming

affect discussed in 13A.

A roundabout at SBOn-Rampintersection will forcevehicles to reducespeed when enteringthe roundabout. Theroundabout will also

serve as a visualsignal to drivers of achange in roadwaycharacter.

LEGEND Some Moderate Substantial

Benefits

Impacts

Negligible Benefit or

Impact


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Second level


Fifth level

TRAFFIC

Alternatives



Delays (LOS) No ChangeReduced delays at Route9 intersections

Reduced delays at Route 9intersections. Considerabledelay reduction at Route 9intersection with I-91 NBoff-ramp.

Reduced delays at Route9 intersections

Reduced delays atRoute 9 intersections

Reduced delay improves Reduced delay improves Reduced delay improves Reduced delay


rave me No Change travel time throughproject area.

travel time through projectarea.

travel time through projectarea.

improves travel timethrough project area.

Queuing No ChangeReduction in averageand maximum queues

Significant reduction inaverage queues, slightreduction in maximumqueues

Significant reduction inaverage queues, slightreduction in maximumqueues

Reduction in averageand maximumqueues


Benefits

Impacts


Impact


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Second level


Fifth level

ENVIRONMENTAL

IMPACTS

Alternatives



Noise No Change No Change No Change No Change No Change

Wetland No Change No Wetland Impacts No Wetland Impacts No Wetland Impacts No Wetland Impacts

Flood Plain No Change

Placement of some fill inthe floodplain along westside of Southbound I-91On-Ramp

Placement of some fill in thefloodplain along west sideof Southbound I-91 On-Ramp

Placement of some fill inthe floodplain along westside of Southbound I-91On-Ramp

Placement of somefill in the floodplainalong west side ofSouthbound I-91 On-Ramp


SpeciesNo Change No Impacts Anticipated No Impacts Anticipated No Impacts Anticipated

o mpactsAnticipated

Open Space ` No Change No Impacts Anticipated No Impacts Anticipated No Impacts AnticipatedNo Impacts

Anticipated

Air Quality No Change

Slight improvement in airquality due to reducedcongestion along Route9

Slight improvement in airquality due to reducedcongestion along Route 9

Slight improvement in airquality due to reducedcongestion along Route 9

Slight improvementin air quality due toreduced congestionalong Route 9

Light No Change No Impacts AnticipatedSome increase in lightimpacts to residences atroundabout.

Some increase in lightimpacts to residences atroundabouts.

Some increase inlight impacts toresidences atroundabout.


Benefits

Impacts


Impact


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Fifth level

MULTI-MODAL

Alternatives



Pedestrian

AccommodationNo Change

Wider sidewalks;improved pedestrianramps, but slightly longercrossing distance

Reduced pedestrian delayat intersections and widersidewalks throughout.Pedestrians required tocross only one direction oftraffic at a time atroundabout but crossingsare unsignalized.

Reduced pedestrian delayat roundabout and widersidewalks throughout.Pedestrians required tocross only one direction oftraffic at a time atroundabout but ALLcrossings areunsignalized.

Reduced pedestrian

delay at intersectionsand wider sidewalksthroughout.Pedestrians requiredto cross only onedirection of traffic ata time at roundaboutbut crossings areunsignalized.

Traffic operates at


Bicycle

AccommodationNo Change

Intersections of Route 9with ramps can be mademore parallel, reducingbike-car conflicts

Traffic operates at lower

speeds through theroundabout. EastboundRoute 9 bicyclists mayencounter more conflictpoints through theroundabout.

Traffic operates at lower

speeds through theroundabout. EastboundRoute 9 bicyclists mayencounter more conflictpoints through thenorthern roundabout.

lower speedsthrough the

roundabout.Eastbound Route 9bicyclists mayencounter moreconflict pointsthrough theroundabout.

Transit Access No Change

Reduced intersectiondelay along Route 9(east-west) will make a

small improvement inoverall transit travel time.

Reduced intersection delayalong Route 9 (east-west)will make a small

improvement in overalltransit travel time.

Reduced intersectiondelay along Route 9 (east-west) will make a small

improvement in overalltransit travel time.

Reduced intersectiondelay along Route 9(east-west) will makea small improvement

in overall transittravel time.


Benefits

Impacts


Impact


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Fifth level

CONSTRUCTIONAlternatives


Costs$0 M $3.4 M $3.8 M $4.0 M $3.7 M

Duration (Years)0 1 2 - 3 2 - 3 2 - 3

Impacts During

Construction

SAFETY Alternatives


Crash Rates

Emergency Vehicle

Access

COMMUNITY

IMPACTS

Alternatives


Property

Recreation

Impacts/Access

Community

Cohesion

Agricultural

Aesthetics `

ENVIRONMENTAL

IMPACTS

Alternatives


Noise

Wetland



Benefits

Impacts


Impact

TRAFFICAlternatives


Delays (LOS)

Travel Time

Queuing

Rare & EndangeredSpecies

Open Space `

Air Quality

Light

MULTI-MODAL

Alternatives


Rating Rating Rating Rating Rating

Pedestrian

Accommodation

Bicycle

Accommodation

Transit Access


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text styles

Second level


Fifth level

Delays (LOS)

SAFETY

Crash Rates

Emergency Vehicle Access

Traffic Calming

CONSTRUCTION

Alternatives

No

BuildC13 C13A C13B C13C

Costs (Millions) $0 $3.4 $3.8 $4.0 $3.7

Duration (Years)0 1 2 - 3 2 - 3 2 - 3

Impacts During Construction



Benefits

Impacts

Negligible Benefit orImpact

MULTI-MODAL Pedestrian Accommodation

Bicycle Accommodation

ENVIRONMENTALIMPACTS

Light

COMMUNITY

IMPACTSProperty

Aesthetics

TRAFFIC Travel Time

Queuing


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Next StepsNext Steps

Modify Evaluations (if necessary)

Review Modifications with PAC (if necessary)

Public Informational MeetingPAC Meeting(s) to Select Alternatives

Be in Desi n if re uired



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Comments & QuestionsComments & Questions


12-06-05 i-91 pac meeting materials

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