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(ITS)

CEE 320Steve Muench

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Outline

• Need for traffic solutions• Possible solutions• Intelligent Transportation Systems

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Road Use Growth

From the Bureau of Transportation Statistics, National Transportation Statistics 2003

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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

Per

cent

of

Pea

k-P

erio

d T

rave

l in

Con

gest

ion

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 ConclusionHighways cost $1 to $10 million per lane-mile to build

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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Sounder Commuter Rail

• Tacoma-Seattle– Began 2000– 4 trips each way daily

• Everett-Seattle– Began 2003– 2 trips each way daily

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Seattle-Everett Interurban Railway Co. (1907)

Asahel Curtis Photo Company Collection, University of Washington Digital Collection

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Sounder vs. Interurban

Sounder Interurban

Tacoma service 2000 – present 1902 – 1928

Everett service 2003 – present 1910 – 1939

One-way trip time 52 – 58 minutes 70 – 100 minutes

Daily departures from Seattle 6 37

Number of stops 9 30

Top speed 80 mph 60 mph

One-way fare $3.00-$4.00 $0.60inflation adjusted: $12.00

Hauled freight? No Yes

Owner Sound Transit Puget Sound Energy

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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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Hig

hw

ay C

apac

ity

Full Capacity

How Much Capacity Is There?

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Incidents: more delay is caused by incidents thanby recurring peak period congestion.H

igh

way

Cap

acit

y

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 thanby recurring peak period congestion.H

igh

way

Cap

acit

y

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 thanby recurring peak period congestion.H

igh

way

Cap

acit

y

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 thanby recurring peak period congestion.H

igh

way

Cap

acit

y

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 thanby recurring peak period congestion.H

igh

way

Cap

acit

y

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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Hig

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apac

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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

htt

p:/

/ww

w.t

raffi

cgau

ge.c

om

/in

dex.h

tml

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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

other 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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APTS: Bus Signal Priority

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Advanced Vehicle Control Systems

Intelligent Cruise Control (ICC)

System

Lexus LS430/460, ES-350Benz S-Class, E55, AMG, CLS, SL, CLAcura RLAudi A6, A8, Q7Cadillac DTS, STS, XLRHonda LegendInfinity M, Q45Jaguar XK-RBMW 3, 5, 7 SeriesNisan PrimeraRange Rover SportToyota Sienna XLE, AvalonVolkswagon Phaeton, PassatRenault Vel SatisVolvo S80

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VW and Google Earth

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Windows Live Local Street Level