Turn Penalties Based on Junction Delays Imported from SATURN

Need for Strategic & Detailed ModelNeed for Strategic & Detailed Model Traditional MethodologyTraditional Methodology EMME2001 ApproachEMME2001 Approach Use of SATURN Junction DelayUse of SATURN Junction Delay Implications for Public TransportImplications for Public Transport

Need for Strategic & Detailed ModelNeed for Strategic & Detailed Model Traditional MethodologyTraditional Methodology EMME2001 ApproachEMME2001 Approach Use of SATURN Junction DelayUse of SATURN Junction Delay Implications for Public TransportImplications for Public Transport

Dynamics of Hong Kong Historical & Future Economic GrowthHistorical & Future Economic Growth Major Investment in Transport InfrastructureMajor Investment in Transport Infrastructure

(road, bus, rail)(road, bus, rail) Revision of Land Use Strategy (housing, port,Revision of Land Use Strategy (housing, port,

reclamation)reclamation) Other Transport Policy (tolls & road pricing, Other Transport Policy (tolls & road pricing,

environment) environment)

Historical & Future Economic GrowthHistorical & Future Economic Growth Major Investment in Transport InfrastructureMajor Investment in Transport Infrastructure

(road, bus, rail)(road, bus, rail) Revision of Land Use Strategy (housing, port,Revision of Land Use Strategy (housing, port,

reclamation)reclamation) Other Transport Policy (tolls & road pricing, Other Transport Policy (tolls & road pricing,

environment) environment)

Existing Railway and Highway NetworkExisting Railway and Highway Network

Tai OLantau Island

Hong KongIsland

New Airport atChek Lap Kok

Sha Tin

Tsuen Wan

New Territories

Tuen Mun

Yuen Long

Mui Wo

DiscoveryBay

SheungShui

Tai O

Nim WanMa On Shan

Sai Kung

Man Kam To

Shekou

Shenzhen

ChaiWan

Tai Po

Kam Tin

TseungKwan O

Pak Nai

TsingYi

Lok MaChau

Central

KwunTong

Tung Chung

Tai Ho

Sha Tau Kok

Kowloon

Wong ChukHang

Lei YueMun

Existing Road

Existing Railway

LEGEND:

Historical Trend of Hang Seng Index

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

Jun-93

Jun-94

Jun-95

Jun-96

Jun-97

Jun-98

Jun-99

Period

Han

g S

en

d In

de

x P

oin

t

STRATEGIC HIGHWAY NETWORK FOR DEVELOPMENTSTRATEGIC HIGHWAY NETWORK FOR DEVELOPMENT( High Growth Scenario )

SHEKOU

SHENZHEN

Shenzhen Western Corridor

SHEKOU

NEW TERRITORIES

SHENZHEN

HONG KONGISLAND

LANTAU ISLAND

Yuen Long

Sheung Shui

Tuen Mun

Tsuen Wan

Tin Shui Wai

Hong KongInternational Airport

Sha Tin

TseungKwan O

Tai Wai

KOWLOON

Lingdingyang Bridge

LEGEND :

RECOMMENDED HIGHWAY PROJECTS INSHORT TERM ( AROUND 2006 )

EXISTING AND COMMITTED HIGHWAY PROJECTS IN 1999

RECOMMENDED HIGHWAY PROJECTS INMEDIUM TERM ( AROUND 2011 )

RECOMMENDED HIGHWAY PROJECTS INLONG TERM ( AROUND 2016 )

Need for Strategic & Detailed Models

Dynamics of Hong Kong Dynamics of Hong Kong Use of Model in “non-traditional” ApplicationsUse of Model in “non-traditional” Applications Technology (processing power, commercialTechnology (processing power, commercial

platforms)platforms) BDTM Investment (10 models)BDTM Investment (10 models) Results vs ExpectationsResults vs Expectations

Dynamics of Hong Kong Dynamics of Hong Kong Use of Model in “non-traditional” ApplicationsUse of Model in “non-traditional” Applications Technology (processing power, commercialTechnology (processing power, commercial

platforms)platforms) BDTM Investment (10 models)BDTM Investment (10 models) Results vs ExpectationsResults vs Expectations

N T W 1

N T E 1

N T W 2

N T W 3

K1 K2

N T E 2H K 1

H K 3

H K 2

Basic Travel Demand Basic Travel Demand Extracted from WAYSExtracted from WAYS

Developed for Detailed Developed for Detailed AssessmentAssessment

Zone SplittingDetailed Zone

System

DetailedModel

Assignment

Detailed Link & Junction

Data

Broad Zone & CoarseNetwork Data

Generation, Distribution, Mode Spilt & Assignment

Traversal Matrix

Strategic Model

40

TRADITIONAL METHODOLOGY

Drawbacks of Traditional Methodology

Coarse Network RepresentationCoarse Network Representation Volume-Delay Curves [ Turn Volume-Delay Curves [ Turn

Penalties]Penalties] Zone Splitting RequiredZone Splitting Required ““Static Assignment”Static Assignment” Separate Top-Down ApproachSeparate Top-Down Approach

Coarse Network RepresentationCoarse Network Representation Volume-Delay Curves [ Turn Volume-Delay Curves [ Turn

Penalties]Penalties] Zone Splitting RequiredZone Splitting Required ““Static Assignment”Static Assignment” Separate Top-Down ApproachSeparate Top-Down Approach

• Recognise independent Recognise independent rolerole • Cost & BDTM Cost & BDTM investmentinvestment

•• Opportunities for Opportunities for Data-sharing Data-sharing

for Improved Demand for Improved Demand ForecastsForecasts

Tac

tic

al

Strategic

Tac

tic

al

StrategicStrategic

Tac

tic

al

Net

wor

k

Net

wor

k

Det

ail

Det

ail

Network SizeNetwork Size

ROLE OF STRATEGIC & DETAILED MODELS

GenerationDistributionMode Split

Strategic Model

Detailed Model

Detailed Local Area (Network & Zones)

Assignment

400

EMME/2 2001 APPROACH

Advantages of EMME/2 2001 Approach

Detailed Zone and Network RepresentationDetailed Zone and Network Representation Eliminates the Need for Zone SplittingEliminates the Need for Zone Splitting Use of Government Investment in BDTM’sUse of Government Investment in BDTM’s Integrated & Seamless ApproachIntegrated & Seamless Approach Allows Process of FeedbackAllows Process of Feedback Achieves User ExpectationsAchieves User Expectations

Detailed Zone and Network RepresentationDetailed Zone and Network Representation Eliminates the Need for Zone SplittingEliminates the Need for Zone Splitting Use of Government Investment in BDTM’sUse of Government Investment in BDTM’s Integrated & Seamless ApproachIntegrated & Seamless Approach Allows Process of FeedbackAllows Process of Feedback Achieves User ExpectationsAchieves User Expectations

Calculation of AUTO TIMES

AREA WIDEAREA WIDE

Uninterrupted Flow Based on Volume-Delay FunctionsUninterrupted Flow Based on Volume-Delay Functions Volume-Delay Functions Derived from WAYSVolume-Delay Functions Derived from WAYS Only Mid-Block Link Delay Considered ExplicitlyOnly Mid-Block Link Delay Considered Explicitly Free Flow Speed, Mid-block Capacity, VolumeFree Flow Speed, Mid-block Capacity, Volume

AREA WIDEAREA WIDE

Uninterrupted Flow Based on Volume-Delay FunctionsUninterrupted Flow Based on Volume-Delay Functions Volume-Delay Functions Derived from WAYSVolume-Delay Functions Derived from WAYS Only Mid-Block Link Delay Considered ExplicitlyOnly Mid-Block Link Delay Considered Explicitly Free Flow Speed, Mid-block Capacity, VolumeFree Flow Speed, Mid-block Capacity, Volume

F U N C T I O N P L O T A U T O V O L U M E - D E L A Y

00-11-24 17:09MODULE: 4.13WSA.........eh

EMME/2 PROJECT: CBD Traffic Management StudyFUNCTION FD13: LENGTH / ((75 - 12.5 * PUT((VOLAU + VOLAD) / EL1)) * (GET(1) .LT. .4)

+ (70 - 56.67 * (GET(1) - .4)) * (GET(1) .GE. .4) * (GET(1) .LT. 1 ...

0 250 500 750 1000 1250 1500 1750 2000

0

1

2

3

4

5

6

7

8

9

10 1

1VOLAD= 0LENGTH= 1EL1= 1200

VOLAU

FD13

Calculation of AUTO TIMESAREA WIDEAREA WIDE

Junction Delays represented by Turn PenaltiesJunction Delays represented by Turn Penalties Cycle Length, Green Time and Saturation FlowCycle Length, Green Time and Saturation Flow Simplistic Representation as above Parameters PresetSimplistic Representation as above Parameters Preset No optimisation of Cycle Length & Green Times or No optimisation of Cycle Length & Green Times or

Coordination of Off-setsCoordination of Off-sets

AREA WIDEAREA WIDE

Junction Delays represented by Turn PenaltiesJunction Delays represented by Turn Penalties Cycle Length, Green Time and Saturation FlowCycle Length, Green Time and Saturation Flow Simplistic Representation as above Parameters PresetSimplistic Representation as above Parameters Preset No optimisation of Cycle Length & Green Times or No optimisation of Cycle Length & Green Times or

Coordination of Off-setsCoordination of Off-sets

F U N C T I O N P L O T T U R N P E N A L T Y

00-11-28 14:50MODULE: 4.13WSA.........eh

EMME/2 PROJECT: CBD Traffic Management StudyFUNCTION FP5: (EP1 * (1 - EP2) * (1 - EP2 + PUT((PVOLAU + PVOLAD) / (EP2 * 1800))) *

(GET(1) .LE. 1) + (EP1 * (1 - EP2) * (2 - EP2) + (GET(1) - 1) * 1 ...

0 200 400 600 800 1000 1200

0

.5

1

1.5

2

2.5

3

3.5

4

4.5

5 1

1PVOLAD= 0EP1= 60EP2= .5

PVOLAU

FP5

Calculation of AUTO TIMES

DETAILED AREADETAILED AREA

Uninterrupted Flow Based on Volume-Delay Functions Uninterrupted Flow Based on Volume-Delay Functions Junction Delay Imported from SATURNJunction Delay Imported from SATURN Dynamic SimulationDynamic Simulation Optimisation & CoordinationOptimisation & Coordination Improved Auto Travel Time & Travel DemandImproved Auto Travel Time & Travel Demand

DETAILED AREADETAILED AREA

Uninterrupted Flow Based on Volume-Delay Functions Uninterrupted Flow Based on Volume-Delay Functions Junction Delay Imported from SATURNJunction Delay Imported from SATURN Dynamic SimulationDynamic Simulation Optimisation & CoordinationOptimisation & Coordination Improved Auto Travel Time & Travel DemandImproved Auto Travel Time & Travel Demand

Calculation of TRANSIT TIMES

Auto Travel TimeAuto Travel Time Additional Stopping Time for Boarding & Additional Stopping Time for Boarding &

AlightingAlighting

f=timau+a*lengthf=timau+a*length

Auto Travel TimeAuto Travel Time Additional Stopping Time for Boarding & Additional Stopping Time for Boarding &

AlightingAlighting

f=timau+a*lengthf=timau+a*length

Calculation of TRANSIT TIMES

Auto Travel TimeAuto Travel Time Additional Stopping Time for Boarding & AlightingAdditional Stopping Time for Boarding & Alighting Average Junction Delay calculated usingAverage Junction Delay calculated using

Network CalculationsNetwork Calculations

f=timau+a*length+average junction delayf=timau+a*length+average junction delay Improved Transit Travel Time & Travel DemandImproved Transit Travel Time & Travel Demand

Auto Travel TimeAuto Travel Time Additional Stopping Time for Boarding & AlightingAdditional Stopping Time for Boarding & Alighting Average Junction Delay calculated usingAverage Junction Delay calculated using

Network CalculationsNetwork Calculations

f=timau+a*length+average junction delayf=timau+a*length+average junction delay Improved Transit Travel Time & Travel DemandImproved Transit Travel Time & Travel Demand