Traffic Models in the Traffic Management

Workshop Domain 3,

May 7 – 8, 2001

VIKING

Alf Peterson, Vägverket Region Stockholm - SNRA

Traffic Management Plans in Stockholm -

an implementation

• Background

• Operation

• Exemples of Models

Wiking Workshop, May 7-8th, Hannover

Traffic Operation

• Co-ordination between actors– Directive from Government– The Partners strive for an optimised use of the whole transportsystem,

which should be seamless

• Multi-modal oriented– ”smart” tours– get information before trip– get information en-tour

• Expedients for this– Public information - Road Operators, Radio etc– Customised information - Service Providers – Information along the road - Road and Public Transport Operators

Wiking Workshop, May 7-8th, Hannover

Example Essingeleden E4

Wiking Workshop, May 7-8th, Hannover

E4 Essingeleden – mobility in terms of speed and fuel consumption

100

90

80

70

60

50

40

30

20

10

0

Bredäng

Start

tid: 0

7:25:01

Västberga

Nyboda

Stora

Essingen

Fredhäll

Tomteboda

Solnabron

Eugenia

Genomsnittshastighet: 6.9 km/hBränsleförbrukning: 2.56 lit/10 kml

Genomsnittshastighet : 19.4 km/hBränsleförbrukning: 1. 29 lit/10 km

Genomsnittshastighet : 69.5 m/hBränsleförbrukning : 0.64 lit/10 km

Ha

stig

he

t km

/h

Genomsnittshastighet på vägsträckan

Wiking Workshop, May 7-8th, Hannover

Co-operationCity of Stockholm

• Joint TMC

• ”Joint” roadnet - seamless

• ”Road assistance”

• Exchange of – Traffic data– Disruptions– Roadworks etc.

• Web www.trafiken.nu

Vägtrafikcentralen

S T O C K H O L M

Wiking Workshop, May 7-8th, Hannover

• Joint user interface

• Decision support system

• A stored and complete bedding/support

• fast and correct measures, TMP

• improved mobility and minimised damage and risks

Traffic Managemet SystemCTS , Central Technical System

IN DATA

Automatic alarms from all connecting systems , Telephone, Traffic data, Video, Weatherinfo, Co-operating partners mm

SCENARIOS

Traffic Management Plans

THE OPERATION OF MEASURES

Mail, Fax,Telephone,TMP´s via connected systems, Vägassistans mm

Wiking Workshop, May 7-8th, Hannover

Genericreport

Create a new report

Deletedreport

Delete the report

Registeredreport

Register thereport

Confirmedreport

Confirmr the report

TMP inoperation

Make a choice and operate a TMP

Finalised report

Finalise the report withoutconfirmation

Finalise the reportafter restoration of TMP

TMPrestored

Restoreplan

Finalise the report

Without a TMP

Traffic Management Plans

Wiking Workshop, May 7-8th, Hannover

Operators can intervene in different systems

Wiking Workshop, May 7-8th, Hannover

Screen view

Wiking Workshop, May 7-8th, Hannover

Development of roadside systems• GIS

– Maps– Joint roadnet database, NVDB

• Technical system– Intelligent traffic signals– Motorway Control System (MCS)– Real-times based traffic models– Variable Message Sign

• Organisation– adaption and development

• Evaluations

Wiking Workshop, May 7-8th, Hannover

Incident ManagementStockholm

Road- assistance• Dispatched from VTC • Radius ca 10 km, main road networkt• Operating time 0630 – 1930 working day• Two trucks• Tow-away vehicle• Policé

Wiking Workshop, May 7-8th, Hannover

The Operaters need processed information

Exemple:

• Journeytimes between optional locations (O-D)– normal journey times– current journey times– Journey time predictions – 15 resp. 30 minutes– scenarios - descriptive

• Three different methods– Contram ITS, an off line modell (mezzo) – normal journey times, scenarios– Matrix, an realtime model, current jouney times related to O-D, control functions– Probes, position data from existing users, current journtey times

Wiking Workshop, May 7-8th, Hannover

Incident location

Increased congestion after 30min

Incident delay estimates (veh.h):Modelled 990 Observed 1500

Rear-end collision Essingeleden during am peak hour(speed difference in km/h compared with normal situation)

Wiking Workshop, May 7-8th, Hannover

Off-line tactical use

Preliminary location of VMS in Stockholm

Wiking Workshop, May 7-8th, Hannover

Off-line tactical use

VMS

VMS

VMS

VMS

VMS

Incident location

Incidents and VMS modelled

Wiking Workshop, May 7-8th, Hannover

Off-line tactical use

Accident at Roslagsvägen during am peak(speed difference in km/h compared with normal situation)

Left: No VMS and re-routing Right: VMS noticed by 50% of drivers

VMS

E4 at Järva Krog more congested

Situation after 40min, incident just cleared

Wiking Workshop, May 7-8th, Hannover

Off-line tactical use

7.15-7.35

7.35-7.55

7.55-8.15

8.15-

Incidentand no VMS

Incidentand VMS

Total networkimprovment714 veh.h.

Wiking Workshop, May 7-8th, Hannover

Test area

To be extended

Parameters

• link/lane

• Length

• nod/junction

• capacity

• v/d functions

• O-D pattern

• centroides

• Detectors and indata

• Probes and indata

Calibration

• Flows

Validation

• journey timesWiking Workshop, May 7-8th, Hannover

MATRIX a realtime traffic automation- system, a generic information and “control” platform

Stockholm:Information från:•MCS•Image processing•Traffic Signals•Traditional detectors•Intelligent traffic signals•Probes

O/D ESTIMATION ASSIGNMENT

MONITORINGOf road network

CONTROLVia traffic-systems

“FAST”CYCLE

“SLOW”

CYCLE

Wiking Workshop, May 7-8th, Hannover

Any questions?Any questions?

Wiking Workshop, May 7-8th, Hannover