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GREATER NEW YORK A GREENER Travel Demand Modeling for analysis of Congestion Mitigation policies October 24, 2007
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Analyzing congestion mitigation measures How would alternative policies impact: Amount of driving in Manhattan (both trips and VMT)? Mode shift of drivers to transit? Air quality? Revenue available for transit capital expansion? How would alternative policies impact: Amount of driving in Manhattan (both trips and VMT)? Mode shift of drivers to transit? Air quality? Revenue available for transit capital expansion?
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Analyzing congestion mitigation measures Only a regional travel demand model like NYMTC’s Best Practices Model (BPM) can answer these questions Regional Travel Demand Models: Show how regional traffic and transit flows respond to changing land use, infrastructure and toll policy conditions. Modeling tools commonly used in EIS and site-specific studies Microsimulations: Show how a fixed amount of traffic flows through a corridor or network. Intersection level analyses: Show the detailed operation of individual intersections. Only a regional travel demand model like NYMTC’s Best Practices Model (BPM) can answer these questions Regional Travel Demand Models: Show how regional traffic and transit flows respond to changing land use, infrastructure and toll policy conditions. Modeling tools commonly used in EIS and site-specific studies Microsimulations: Show how a fixed amount of traffic flows through a corridor or network. Intersection level analyses: Show the detailed operation of individual intersections.
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Best Practice Model (BPM) Development Developed by New York Metropolitan Transportation Council (NYMTC), the metropolitan planning organization, to meet the federal requirements for long-range planning. Air quality conformity analysis Modeling impact of major infrastructure projects such as: Tappan Zee Bridge and I-287 Corridor Study Goethals Bridge Modernization DEIS Developed by New York Metropolitan Transportation Council (NYMTC), the metropolitan planning organization, to meet the federal requirements for long-range planning. Air quality conformity analysis Modeling impact of major infrastructure projects such as: Tappan Zee Bridge and I-287 Corridor Study Goethals Bridge Modernization DEIS
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History of BPM 28 counties in New York, New Jersey and Connecticut Model released 2002, updated 2005 State-of-the-art travel model Only travel model in NY region 28 counties in New York, New Jersey and Connecticut Model released 2002, updated 2005 State-of-the-art travel model Only travel model in NY region
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Key inputs Highways Arterial streets Transit 4,000 zones for trip origins and destinations Highways Arterial streets Transit 4,000 zones for trip origins and destinations
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Key inputs 2005 population and employment by zone 2005 transit network Tolls and fares and other travel costs Travel diary survey 11,264 households 27,369 persons 90,764 trips 2005 population and employment by zone 2005 transit network Tolls and fares and other travel costs Travel diary survey 11,264 households 27,369 persons 90,764 trips
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BPM structure and processes Populates each zone with households and jobs Based on: 2005 population and employment Populates each zone with households and jobs Based on: 2005 population and employment
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BPM structure and processes Creates daily “tours” and time period for each trip within the tour Purposes: Work University School Household maintenance (errands) Discretionary activities (leisure) Work-based (meetings, etc) Based on: Household characteristics (age, income, car ownership, etc.) Employment levels School enrollment Travel diary survey Creates daily “tours” and time period for each trip within the tour Purposes: Work University School Household maintenance (errands) Discretionary activities (leisure) Work-based (meetings, etc) Based on: Household characteristics (age, income, car ownership, etc.) Employment levels School enrollment Travel diary survey Time periods: AM Peak (6am-10am) Midday (10am-4pm) PM Peak (4pm-8pm) Night (8pm-6am) Time periods: AM Peak (6am-10am) Midday (10am-4pm) PM Peak (4pm-8pm) Night (8pm-6am)
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BPM structure and processes Determines destinations for each tour Based on: Employment locations Other destinations (shopping, etc.) Travel time, fares, congestion, tolls involved in reaching each destination Determines destinations for each tour Based on: Employment locations Other destinations (shopping, etc.) Travel time, fares, congestion, tolls involved in reaching each destination
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BPM structure and processes Determines mode for each leg of tour SOV HOV2, HOV3, HOV4+ Walk to transit Drive to transit Based on: Transit service levels Fares, tolls, parking and other driving costs Travel diary survey Determines mode for each leg of tour SOV HOV2, HOV3, HOV4+ Walk to transit Drive to transit Based on: Transit service levels Fares, tolls, parking and other driving costs Travel diary survey Walk to commuter rail Drive to commuter rail Taxi School bus Non-motorized Walk to commuter rail Drive to commuter rail Taxi School bus Non-motorized
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BPM structure and processes Determines route Based on: Transit frequency Travel time Congestion Determines route Based on: Transit frequency Travel time Congestion
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BPM outputs County-to-county trip flows Trip purpose Time of day Mode Traffic speeds and vehicle miles traveled (VMT) Air quality based on changes in vehicle volumes Results validated to: Ground counts of traffic volumes Transit ridership County-to-county trip flows Trip purpose Time of day Mode Traffic speeds and vehicle miles traveled (VMT) Air quality based on changes in vehicle volumes Results validated to: Ground counts of traffic volumes Transit ridership
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BPM outputs
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6.3% reduction in vehicle miles traveled (VMT) in charging zone 7.2% increase in speeds in zone 11.3% reduction in vehicle trips entering the charging zone 6% -12% reduction in key pollutants and greenhouse gases 6.3% reduction in vehicle miles traveled (VMT) in charging zone 7.2% increase in speeds in zone 11.3% reduction in vehicle trips entering the charging zone 6% -12% reduction in key pollutants and greenhouse gases
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