T.F. Green Airport Improvement Program - FEIS Chapters - PVD

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T.F. Green Airport Improvement ProgramEnvironmental Impact Statement and Final Section 4(f) EvaluationThe InterLink facility is located at the southeast quadrant of the Jefferson Boulevard/Coronado Road intersectionand was completed in October 2010. Limited Massachusetts Bay Transportation Authority (MBTA) service startedDecember 2010. The station provides a direct pedestrian link between the Airport and connecting rail service toBoston and Providence. InterLink includes a Consolidated Rental Car Facility. Passengers can arrive at T.F. GreenAirport and take a moving walkway directly from the terminal to InterLink to obtain their rental cars.4.5.2.2 Surface Transportation EvaluationThe evaluation of the transportation infrastructure focused on the key roadways serving the Airport, includingAirport Connector, State Route 37, Airport Road, Post Road, Jefferson Boulevard, and Main Avenue (State Route113). The key intersections along these streets are included in the Study Area along with the ramp junctions andfreeway segments along Airport Connector and Route 37 extending from the Airport to I-95. The evaluation is basedon morning and evening peak hour conditions that were determined using the traffic counts and observations. Theterm Level of Service (LOS) is used to denote the different operating conditions that occur under select traffic volumeloads. It is a qualitative measure that considers a number of factors including traffic demands, roadway geometry,speed, signal operations, travel delay, and freedom to maneuver. The LOS designation is an index ranging from A toF, with LOS A representing the best operating conditions and LOS F representing the worst operating conditions.Signalized IntersectionsThe Baseline Condition morning and evening peak hour capacity analyses for the signalized intersections in theStudy Area identified two intersections that operate under LOS E or F conditions:• Post Road at Lincoln Avenue• Airport Road at Warwick AvenueIn addition to the overall intersection performance assessment, an operational assessment determined that thefollowing intersections have lane groups that operate at LOS E or F during the morning or evening peak hourunder Baseline Conditions:• Post Road at Lincoln Avenue• Post Road at Airport Road• Airport Road at Warwick Avenue• Post Road at Coronado Road• Main Avenue at Industrial Drive• Main Avenue at Jefferson Boulevard• Jefferson Boulevard at Coronado Road/Kilvert StreetUnder the Baseline Condition, the on-Airport signalized location where Airport Connector intersects withTerminal Loop Road operates at capacity due to high demands, short storage bays, inefficient intersectiongeometry, and a high number of signal phases. This poor condition contributes to long delays and queues alongthe entire southern portion of Terminal Loop Road.Chapter 4 – Affected Environment 4-28 July 2011\\mawatr\ev\09228.00\reports\FEIS_Final_July_2011\PVD_CH04_Affected_Env_JUL_2011.doc
T.F. Green Airport Improvement ProgramEnvironmental Impact Statement and Final Section 4(f) EvaluationUnsignalized IntersectionsUnder the Baseline Condition, the intersection of Jefferson Boulevard and Airport Connector off-ramp is theonly unsignalized intersection in the Surface Transportation Study Area operating under LOS E or LOS Fconditions. 185 Vehicles exiting Airport Connector attempting to turn left onto Jefferson Boulevard experienceexcessive delays that result in LOS E or F conditions during the morning and evening peak hours. Heavyvolumes on Jefferson Boulevard result in insufficient gaps in the traffic stream that hinder the off-ramp vehiclesturning onto Jefferson Boulevard.Ramp Junctions and Freeway SegmentsAll of the ramp merges in the Study Area operate at LOS C or better during weekday peak hour trafficconditions. These results indicate that State Route 37 and Airport Connector have sufficient capacity toaccommodate merging maneuvers from on-ramps during weekday peak hour conditions.All ramp diverges in the Study Area operate at LOS C or better during weekday peak hour traffic conditions.These results indicate that State Route 37 and Airport Connector have sufficient capacity to accommodatediverging maneuvers from off-ramps during weekday peak hour conditions.All of the freeway segments in the Study Area operate at LOS B or better or better during weekday peak hourtraffic conditions. These results indicate that State Route 37 and the Airport Connector have sufficient capacityto handle the roadway traffic demands during weekday peak hour conditions.Intersection SafetyFor all of the Surface Transportation Study Area intersections, the average crash occurrence was 34 crashes overthe three-year period from 2002 to 2004. The majority of intersections (13) had three-year averages at or belowthis number. Five intersections exhibited higher crashes for the three-year period; three of those notably higher,in excess of 75 crashes per year. The five intersections with the highest occurrence of crashes were PostRoad/Airport Road (98 crashes), Airport Road/Warwick Avenue (89 crashes), Post Road/Airport ConnectorRamps (75 crashes), Jefferson Boulevard/Airport Connector Ramps (55 crashes), and JeffersonBoulevard/Coronado Road/Kilvert Street (49 crashes).It is notable that at two of the intersections that experienced a high occurrence of crashes, a large percentage of thecrashes were rear-end collisions. At the intersections of Post Road/Airport Road and Airport Road/WarwickAvenue, rear-end crashes accounted for 74 percent and 68 percent of the total crashes, respectively. At theintersection of Main Avenue at Industrial Drive, 80 percent of the crashes were rear-end collisions. Since all threelocations are signalized intersections, the high occurrence of rear-end collisions may be caused by inadequate sightdistance or excessive queuing.Three intersections had a high percentage (greater than 50 percent) of crashes involving personal injury. At theintersections of Airport Road/Hade Court, Airport Road/Commerce Drive, and Post Road/Donald Avenue,185 A traffic signal has since been installed at this intersection as part of the InterLink project.Chapter 4 – Affected Environment 4-29 July 2011\\mawatr\ev\09228.00\reports\FEIS_Final_July_2011\PVD_CH04_Affected_Env_JUL_2011.doc
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T.F. Green Airport Improvement Program - FEIS Chapters - PVD

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