Turn Penalties Based on Junction Delays Imported from SATURN Need for Strategic & Detailed Model...
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Transcript of Turn Penalties Based on Junction Delays Imported from SATURN Need for Strategic & Detailed Model...
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