Week4 - Transport Modes and Technologies A Walking Tour on...

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Transport Modes and Technologies A Walking Tour on LOS, Capacity… Urban Transportation Planning MIT Course 1.252j/11.380j Fall 2002 Mikel Murga, MIT Research Associate September 27, 2002
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2 Urban Transportation Planning – Fall 2002 Day 4 Transport Modes and Technologies ! The automobile ! Transit ! Bus ! Light Rail ! Rapid Transit ! Non Motorized Modes ! Walking ! Biking
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3 Urban Transportation Planning – Fall 2002 Day 4 The Automobile - Infrastructure ! Road system: ! Hierarchical system: ! From turnpike to local street ! From unimpeded movement to access to properties ! Uninterrupted segments: ! Turnpike (access control) ! Interrupted segments: ! Traffic signals, stops… Mobility Land Access Arterials Collectors Locals
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4 Urban Transportation Planning – Fall 2002 Day 4 The Automobile + Infrastructure ! Other support systems: ! Traffic Police ! Traffic Management Centers ! Parking ! Gas stations ! Garages
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5 Urban Transportation Planning – Fall 2002 Day 4 The Automobile – Demand Served ! HBW: Home-based work ! HBO: Home-based other: ! Shopping trips ! School trips ! Personal and recreational trips ! NHB: Not home-based (ie: Business trips) HBW represents less than 35% Peak-spreading and latent demand
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6 Urban Transportation Planning – Fall 2002 Day 4 Highway Capacity ! The Power of Little Numbers ! Sophisticated models are indeed needed ! But so, are little numbers in the back of an envelope ! Who wants to be taken for a ride?
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7 Urban Transportation Planning – Fall 2002 Day 4 Automobile Capacity = Throughput (Veh/hr/ln) Level-Of-Service (LOS) = Flow/Capacity (or I/C or V/C) Notice density and spacing among vehicles Level of Service A Level of Service F
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8 Urban Transportation Planning – Fall 2002 Day 4 The Automobile – Capacity
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9 Urban Transportation Planning – Fall 2002 Day 4 The Automobile – Capacity and LOS
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10 Urban Transportation Planning – Fall 2002 Day 4 LOS: A changing reality ! Human adaptation is the key… ! From infrastructure construction to management of the existing system ! The Highway Capacity Manual (HCM) speed-flow curve: ! People learning to drive congested roads ! The initial dream of ITS
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11 Urban Transportation Planning – Fall 2002 Day 4 Human adaptation
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12 Urban Transportation Planning – Fall 2002 Day 4 The Automobile – Capacity and LOS
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13 Urban Transportation Planning – Fall 2002 Day 4 The Automobile – Capacity ! Vehicle throughput in controlled sections: ! Traffic signals, roundabouts, all-stops… ! Automobiles and trucks – reaction times ! Saturation and gridlock
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14 Urban Transportation Planning – Fall 2002 Day 4 The Automobile – Capacity Reference Nos
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15 Urban Transportation Planning – Fall 2002 Day 4 The Automobile – Capacity ! PEOPLE throughput : ! Vehicle throughput times OCCUPANCY ! Auto-occupancy (a non-technical issue) ! HBW… 1.1 ! HBO-shop… 1.4 ! HBO-social… 1.7 ! NHB…… 1.6
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Week4 - Transport Modes and Technologies A Walking Tour on...

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