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22 Cards in this Set
- Front
- Back
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Planning |
1. forecasting (trip generation) 2. congestion mgmt (trip distribution) 3. long-range transpo plan (travel demand) 4. alternatives analysis (impacts on env, land, community) |
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EXAMPLE OF PLANNING PHASE State highway runs through a city, causing delays and congestion at intersections. What can transpo planners recommend? |
1. Tunnels, bridges (grade separation) 2. Bypass the state highway 3. Widen state highway, or widen city streets
W/o major construction 4. Create HOV lane 5. Adjust light timing 6. Change land use (limit parking on city streets) |
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EXAMPLE OF OPERATIONS PHASE SEPTA strike = enormous delays. What can be done to alleviate this problem? No construction. |
1. Carpool 2. Detours (set-up and advertise) 3. Work with taxi companies 4. Adjust traffic signal timing 5. Temporarily change to one-way roads in downtown |
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Transpo System Characteristics (4) |
1. Links 2. Vehicles 3. Terminals 4. Intermodal Transfer points |
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Links |
connection between 2+ points (roads, tracks, pipes) |
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Vehicles |
Means of moving people/goods (cars, buses, taxis, pipes) |
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Terminals |
Modes where travel begins and ends (destination and origin) |
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Intermodal Transfer Points |
Place where change of mode occurs (airport parking, airport terminal, shuttle bus) |
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EVALUATION OF TRANSPORTATION SYSTEMS ************************************** |
1. Ubiquity 2. Mobility 3. Efficiency |
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UBIQUITY *************** |
Amount of accessibility, directness of routing, flexibility variety of conditions |
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MOBILITY **************** |
Quantity of travel that can be handled: capacity and speed |
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EFFICIENCY ************* |
Relationship between cost and productivity |
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What three modes dominate in the US? |
Highways, pedestrians, air |
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US Road Network: Federal-Aid Highway System (3) |
1. Interstate 2. Primary 3. Secondary |
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Interstate |
higher design standards 4% of roadway mileage (but 20% of traffic) no traffic control (lights, rail crossings) |
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Primary |
U.S. Routes 7% of roadway mileage state owned |
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Secondary |
Feeder roads to smaller communities (connect to primary and secondary roads) 400,000 miles of roadway (LARGEST NUMBER) locally owned |
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Functional Class of Facility (4) |
1. Principal arterial 2. Minor arterial 3. Collector 4. Local |
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Principal Arterial |
I-95 Interstates, freeways Thru-traffic over a great distance high mobility, high speeds; low accessability |
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Minor Arterial |
broader surface high speed, but shorter distance rural and suburban areas high mobility, high speeds; low accessability |
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Collector |
Lancaster Ave lower speed streets collect and funnel traffic from arterials to local
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Local Roads |
primary access to homes, businesses, etc low mobility, low speed; high accessability |
