AECOM Project Overview Presentation - I-93 Tri-Town Interchange ...
AECOM Project Overview Presentation - I-93 Tri-Town Interchange ...
AECOM Project Overview Presentation - I-93 Tri-Town Interchange ...
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Recent History• Interstate <strong>93</strong> Corridor Study identified need for new interchange• <strong>Interchange</strong> Justification Report (IJR) prepared for FHWA• FHWA gives tentative approval for break-inin-access (newinterchange)• Environmental studies and conceptual design (based on agencyand public comment) underway
Constraints &OpportunitiesMapping
Alternative 4− Access to South Street− Access to west sideparcels− Inconsistent with accessprovisions in zoningoverlay district
Alternative 9− Does not provide FHWArequired access to localroadway system− Too “circuitous”according to FHWA
Single Point Urban<strong>Interchange</strong> (SPUI)− New concept to consider− Exact layout and locationto be determined− Reduces interchangefootprint− Requires additionalstructural elements andwider bridge deck toaccommodate opposingleft turn movements
Single Point Urban <strong>Interchange</strong> Concept
Tight Diamond<strong>Interchange</strong>− New concept toconsider− Exact layout andlocation to bedetermined− Reduces interchangefootprint− Traditional ramp termini(as opposed to SPUI)
Tight Diamond Concept
<strong>Project</strong> Schedule
Economic Impact Analysis− FXM Associates is part of our consultant team asspecialists in determining the economic impacts ofhighway projects− Frank Mahady will say a few words regarding FXM’soverall approach and the purpose of today’s meeting
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