SLIDE 1
Outline
- Need for traffic solutions
- Possible solutions
- Intelligent Transportation Systems
Intelligent Transportation Systems (ITS) Outline Need for traffic - - PowerPoint PPT Presentation
Intelligent Transportation Systems (ITS) Outline Need for traffic - - PowerPoint PPT Presentation
Intelligent Transportation Systems (ITS) Outline Need for traffic solutions Possible solutions Intelligent Transportation Systems Road Use Growth 4.00 Increase Multiple (Based on 1960 Values) 3.50 Vehicle Miles Traveled 3.00
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Road Use Growth
From the Bureau of Transportation Statistics, National Transportation Statistics 2003 1.00 1.50 2.00 2.50 3.00 3.50 4.00 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005
Year Increase Multiple (Based on 1960 Values)
Vehicle Miles Traveled Registered Vehicles Statute Miles of Roadway
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Changes in Congested Peak-Period Travel
Change in Congested Peak-Period Travel (1982-2000) 20 30 40 50 60 70 80 90 100 1982 1990 1994 2000 Year Percent of Peak-Period Travel in Congestion Los Angeles, CA Seattle-Everett, WA Boston, MA Denver, CO New York, NY- Northeastern, NJ
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Problems Caused by Congestion
- Increased…
– Travel time – Travel cost – Air pollution – Accident risk
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Options
- Construct new roads
– Covered in geometric design – Not likely to happen on a large scale
- Reduce Traffic
– Travel demand management – Alternative transportation
- Increase existing infrastructure capacity
– Uses intelligent transportation systems (ITS)
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Construction Is Part of the Solution
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Option 1: Construction
Highway Construction Cost Sampling
Project Total Cost Lane-Miles Cost per Lane-Mile Route 3, North Boston $395.0 million 42 $9.4 million I-4 Tampa to Orlando $403.0 million 73 $5.5 million I-5 Oregon $30.0 million 5.16 $5.8 million US 26 Sunset Hwy. Oregon $10.6 million 2.24 $4.8 million US 12 near Walla Walla River $36.4 million 25 $1.5 million US 101 on Olympic Peninsula $1.8 million 0.8 $2.2 million
General Conclusion Highways cost $1 to $10 million per lane-mile to build
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San Francisco’s Embarcadero Freeway: Removed 1991
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Option 2: Alternative Transport
But significant new rail capacity will face the same hurdles as new highway capacity.
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Option 2: Alternative Transport
SkyTran: Personal MagLev Transporter
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Option 3: Increase Existing Infrastructure Capacity
- An alternative to expensive new highway
construction is the implementation of strategies that promote more efficient utilization of transportation infrastructures.
- These strategies are known as the Intelligent
Transportation Systems (ITS), which aims to reduce travel time, ease delay and congestion, improve safety, and reduce pollutant emissions
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Highway Capacity
Full Capacity
How Much Capacity Is There?
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Incidents: more delay is caused by incidents than by recurring peak period congestion.
Highway Capacity
Remaining Effective Capacity
How Much Capacity Is There?
Incidents can comprise 50% of peak period congestion. 1 min delay in clearance = 4 to 5 min of traffic backup.
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Work zones: major cost is delay imparted to the traveler Incidents: more delay is caused by incidents than by recurring peak period congestion.
Highway Capacity
Remaining Effective Capacity
How Much Capacity Is There?
Caltrans reports 20% of freeway centerline miles are under construction.
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Work zones: major cost is delay imparted to the traveler Incidents: more delay is caused by incidents than by recurring peak period congestion.
Highway Capacity
Remaining Effective Capacity
How Much Capacity Is There?
Weather: Snow, fog, rain can all restrict capacity 75% of NHS is subject to snow & 100% is subject to rain.
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Work zones: major cost is delay imparted to the traveler Incidents: more delay is caused by incidents than by recurring peak period congestion.
Highway Capacity
Remaining Effective Capacity
How Much Capacity Is There?
Weather: Snow, fog, rain can all restrict capacity Special events and disasters further restrict capacity Periodic events can cause further restrict capacity.
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Work zones: major cost is delay imparted to the traveler Incidents: more delay is caused by incidents than by recurring peak period congestion.
Highway Capacity
Remaining Effective Capacity
How Much Capacity Is There?
Weather: Snow, fog, rain can all restrict capacity Special events and disasters further restrict capacity
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Highway Capacity
Remaining Effective Capacity
How Much Capacity Is There? ITS
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Five Primary Functional Areas of ITS
- Advanced Traffic Management Systems (ATMS)
- Advanced Traveler Information Systems (ATIS)
- Commercial Vehicle Operations (CVO)
- Advanced Public Transportation Systems (APTS)
- Advanced Vehicle Control Systems (AVCS)
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Advanced Traffic Management Systems
Photo from the Human-Computer Interaction Lab: University of Maryland
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WSDOT Traffic Systems Management Center
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WSDOT Traffic Systems Management Center
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WSDOT Traffic Systems Management Center
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ATMS: Snoqualmie Pass
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Advanced Traveler Information Systems
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ATIS: trafficgauge
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WAP Traffic
www.wiresoft.net/traffic/seattle
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ATIS: Traffic Cameras
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Commercial Vehicle Operations
- Apply, pay for and receive permits, registrations,
and licenses electronically
- Share of common trucking data across agencies
- Exchange information electronically with
roadside enforcement personnel
- Electronic “screening” of trucks for safety or
- ther regulatory violations
- Share information across state lines and with
Federal information systems
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CVO: Weigh-In-Motion System
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Advanced Public Transportation Systems
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An Example of APTS
http://busview.its.washington.edu/busview_launch.jsp?maps=gif
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Seattle Bus Monster
http://www.busmonster.com
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APTS: Bus Signal Priority
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