MINISTRY OF TRANSPORT AND INFRASTRUCTURE

REGIONAL COMMISSION TÜBINGEN – STATE OFFICE FOR ROAD ENGINEERING BADEN-WÜRTTEMBERG

Traffic ManagementBased on Intelligent Concepts

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EDITOR

Regional Commission Tübingen State Office for Road Engineering Baden-Württemberg Road Traffic Centre Baden-Württemberg Heilbronner Strasse 300 – 302 D-70469 Stuttgart

www.svz-bw.de

November 2011

CONCEPTION AND ORGANIZATION Orel & Unger communication-services GmbH

DISTRIBUTOR NOTES

The Baden-Württemberg State Governmentissued this publication in the context of itsconstitutional obligation to inform the public.It must not be used by parties or their candida-tes or assistants during an election campaignfor the purpose of campaign advertising. Thisapplies to all elections.

In particular abusive is the distribution at elec-tion meetings, information booths of politicalparties as well as inserting, imprinting or affixingparty-political information or promotion material.

Forbidden is also the distribution to third partiesfor use during election campaigns. Also withouttemporal relation to a forthcoming election thisbrochure must not be used in a way that couldbe understood as support of individual politicalgroups by the editor.

These restrictions apply independently of thedistribution channel, thus independently of theway and amount this publication is received.

Political parties are, however, permitted touse this publication for the information of theirmembers.

NOTES

0303Preface – Winfried Hermann

PREFACEWINFRIED HERMANNMinister of Transport and Infrastructure

“It is especially important to use our transport

infrastructure efficiently and intelligently in future.”

As an industrial location and transit country, Baden-

Württemberg depends on a well-developed and intact

road infrastructure. Considering the density of the

existing road network, the settlement density and the

requirement to reduce land use, the coalition agreement

of the green-red government in Baden-Württemberg

foresees the building of new roads only in justified

single cases. To ensure road infrastructure, we must

concentrate more strongly on maintenance in future.

Improved “inventory management” includes the efficient

use of the available infrastructure by traffic control and

traffic management, by the use of “intelligent transport

systems”. I am committed to intensively advance the

existing approaches in the next few years. We will

not get ahead on promises to build roads that are not

financially viable and feasible for years.

In future, it will be a matter of successfully establishing

a “proactive traffic management“ together with all

stakeholders and understanding this as an important

component of the provision of road infrastructure.

We can rely on a most advanced traffic control centre

in Baden-Württemberg, developed on behalf of the

national government. This centre will be the “blue-

print” for future traffic control centres in Germany. In

addition, we are accelerating the implementation and

expansion of traffic control systems on highly loaded

routes. The experience in Germany and in Europe

shows that tangible improvements can be achieved

with regard to traffic safety and capacity.

The Road Traffic Centre Baden-Württemberg plays a

central role. It puts us into the position to guide the

traffic flows safer and to operate the traffic control

systems in accordance with the quality standards. In

addition, the Road Traffic Centre provides traffic infor-

mation services, such as information on construction

sites and webcams that are available for everyone on

the Internet. Based on the bundled expertise of its staff,

the Road Traffic Centre is at the core of any efficient

road traffic management activities.

Winfried Hermann,

Minister of Transport and Infrastructure

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04Preface – Hermann Strampfer

HERMANN STRAMPFER

This brochure gives an update on the extensive tasks of the Road Traffic

Centre Baden-Württemberg. According to the transport-related mandate of

the Baden-Württemberg State Government, transport safety and efficiency on

the highly loaded roads are to be improved also through the implementation

of advanced traffic control systems. The new, modern traffic control centre in

the State Office for Road Engineering Baden-Württemberg, Department 9 of

the Regional Commission Tübingen, carries out this assignment.

Regional Commissioner

The traffic control centre, since 2009 in its new pre-

mises in the headquarter of the State Office for Road

Engineering Baden-Württemberg in Stuttgart-Feuer -

bach, belongs to one of the nation’s most advanced

facilities of its kind. The relocation at the Stuttgart

site created ideal conditions for the operation of

the available traffic control systems as well as for the

planning and implementation of new, innovative ones.

The design and operation of the central traffic infor-

mation system of the road administration (www.svz-

bw.de) is carried out by the Road Traffic Centre

Baden-Württemberg. The above website provides

you, among others, with the traffic situation on the

federal motorways as well as with images of traffic

cameras in areas subject to congestion. Check out

this service and give us your feedback.

Yours sincerely

Hermann Strampfer,

Regional Commissioner

0505Contents

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ANNEX

06 08 10 12

14 16 18 19

MOTORWAYS IN

BADEN-WÜRTTEMBERG

OBJECTIVES AND

TASKS OF THE ROAD

TRAFFIC CENTRE

TRAFFIC

INFORMATION

FUNCTIONS AND

TASKS OF THE TRAFFIC

CONTROL CENTRE

LINE CONTROL

AND RAMP

METERING SYSTEMS

TUNNEL

MONITORING

CONSTRUCTION

SITES ON MOTORWAYS

REROUTING

SYSTEMS

20THE BASE SYSTEM OF

THE TRAFFIC CONTROL CENTRE

22BADEN-WÜRTTEMBERG

TRAFFIC MONITORING

ANNEX

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SMOTORWAYS IN BADEN-WÜRTTEMBERG

HIGHLY LOADED TRANSPORT ROUTES IN THE STATE.

06Motorways

*Source: “Strassenverkehr in Baden-Württemberg”, brochure edited by the Regional Commission Tübingen

0

10 000

20 000

30 000

40 000

50 000

60 000

1980 1990 2000 2010

The motor vehicle density has increased steadily in the past. Each road

user, who is regularly participating in transport, knows this from personal

experience.

The figures of the annual average daily traffic volume (AADT) confirm

this subjective impression. The annual average daily traffic volume on

motorways increased from 35,296 to 58,487 veh./24h during 1980 and

2010. The traffic growth between 2000 and 2010 decreased considerably

compared to the previous few years.

ANNUAL AVERAGE DAILY TRAFFIC VOLUME*

These traffic loads relate to regional as well as to

transit traffic in north-south and east-west direction.

This also explains the motorway sections with highest

load in Baden-Württemberg:

• A8 between the motorway interchange Leonberg

and the motorway interchange Stuttgart.

• A 5 north of the motorway interchange Karls ruhe.

• A 81 south of the motorway interchange Stuttgart.

• A 6 near Neckarsulm.

DESPITE HIGH LOADS KEEP TRAFFIC MOVING.

The consequences of growing traffic density include

more frequently congestion and a higher risk of acci-

dents. This causes particularly for commercial road

users a reduction in productivity; and an accident

means mostly apart from loss of time and stress also

financial losses. Moreover, the ecological impacts have

to be considered: With congestion as well as stop-and-

go situations fuel consumption and exhaust emissions

rise enormously compared to smooth driving.

0707Motorways

The objectives of the State of Baden-Württemberg

are therefore:

• To establish a coherent traffic management at the

highest technological level – and thus in co-opera-

tion with the Federal Government, the neighbouring

countries and states, and the municipalities as well

as with the economy and science,

• to optimize traffic flow on highways by means of

traffic control systems in order to increase safety

and reduce congestion,

• to make road traffic calculable and predictable,

• to provide interested citizens and the economy

with comprehensive traffic information and thus

to promote sustainable mobility.

In addressing these objectives the Road Traffic Centre

Baden-Württemberg (SVZ BW) has the task to effective-

ly respond to the increasing traffic density by means

of transport telematics and the related technical infra-

structure as far as possible and in a sustainable way.

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NOBJECTIVES AND TASKS OFTHE ROAD TRAFFIC CENTRE ENHANCED TRAFFIC CONTROL,

PROVIDING TRAFFIC INFORMATION.

Motorways are high-speed transport routes for everyone who has a suitable motor vehicle.

Beyond that, they are indispensable “main arteries” for a highly developed national

economy. The major part of the manufactured and trade goods is transported on these

routes to ensure the supply of the population. A dense network of motorways connects all

regions of Germany and, moreover, directly links to the European transport routes.

Transport telematics contributes substantially to the optimum use of the available

capacity reserves.

The Road Traffic Centre Baden-Württemberg is responsible for traffic and information

management by its Traffic Control Centre (TCC). Traffic management can only develop

as effective as possible, if the work of the Road Traffic Centre is oriented at certain basic

conditions.

08 Objectives and tasks

Since the motorways are subject to the jurisdiction

of the federal government, the Road Traffic Centre acts

on behalf of the German Federal Ministry of Transport

when planning and implementing traffic control systems

in Baden-Württemberg. As co-ordination centre for

Baden-Württemberg the Road Traffic Centre is part

of the State Office for Road Engineering Baden-Würt -

tem berg, which belongs to the Regional Commission

Tübingen.

The Road Traffic Centre Baden-Württemberg aims first

and foremost to achieve the optimum utilization of

available road capacity with regard to the motorways

and in parts also the federal roads. For this purpose the

Road Traffic Centre plans, implements and operates

“intelligent” traffic control and guidance systems. This

enables the control of traffic in dependence of the

current traffic load, weather and road conditions.

It is also the task of the Road Traffic Centre to make

traffic information publicly accessible. This means that

information on the current traffic situation and road

conditions are available for the citizens and the economy

for practical use.

The core of the Road Traffic Centre is the Traffic Control

Centre (TCC), where a high-performance computer

processes all data of transport telematics.

In addition to the traffic management on Baden-Württem -

berg’s motorways, the Road Traffic Centre is also in

charge of a central monitoring of construction site

management in the road network of motorways (see

page 19), federal, state and county roads as well as of the

Traffic Information Centre (TIC) of Baden-Würt tem -

berg (see page 10).

0909Objectives and tasks

Monitoring of traffic control systems

Operation of central traffic information portal

Publication of information on traffic situation,

construction site reports and results of traffic counts

Analysis and forecast of traffic situation

Data quality assurance

Traffic information services

Advancement of traffic engineering procedures

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Practical application of the strategy management system

Operation of the Traffic Control Centre

Planning and implementation of traffic control systems

Development of integrated traffic management strategies

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TRAFFIC INFORMATION

FOR OPTIMAL TRIP PLANNING.

10Traffic information

High-quality traffic information is the prere-

quisite for optimal trip planning. The wide range of

information that is provided by the Road Traffic

Centre on the Internet for Baden-Württemberg and

the border regions of neighbouring federal states, in

particular on the motorways, contributes to this aim.

On this basis, the route and the timing of a trip can

be better planned.

The construction site reports from the construction

site information system (see page 19) provide detailed

statements on location, duration and type of construc-

tion works not only on the motorways, but also on the

federal, state and county roads. The traffic information

about congestion and dangerous spots are taken over

by the traffic information service of the police. From

the TCC, the data on the traffic conditions on motor-

ways and selected federal roads are available and

The Road Traffic Centre Baden-Württemberg operates at the address

www.svz-bw.de the central traffic information portal of the Baden-

Württemberg Road Administration. The website offers road users a

variety of traffic information. Meanwhile, 120 traffic cameras on

motorways and federal roads give an impression of the current traffic and

weather conditions. The images of the traffic cameras are presented togeth -

er with construction site and traffic reports as well as with a coloured

presentation of the traffic situation on the motorways on a map display.

1111Traffic information

sometimes supplemented by adding data from an

external service provider. The currently calculated

level of service is given in different colours on the

map in the information portal: from green for free

flow up to red for congestion.

Since May 2009, the local traffic situation and the

weather conditions can be assessed even better by

cameras. Traffic cameras are available at 60 major

locations on motorways and federal roads that are fre-

quently subject to congestion. Each of the 120 traffic

cameras transmits one image per minute via GSM to

the Road Traffic Centre Baden-Württemberg, which

is then published on the website.

All this provides comprehensive information for road

users and the possibility to assess the current traffic

conditions for trip planning.

MORE TRAFFIC INFORMATION IN THE FUTURE.

The contents of the traffic portal will be supplemented

in a next step by additional traffic-relevant information.

It is envisaged to provide road weather data and further

results of traffic counts on the information platform.

Based on a pilot project on the A5 south of Freiburg

the free truck parking capacity at the rest areas is planned

to be published in future. Future enhancements will

include traffic forecasts, both as a short-term preview

for the next hour and as a long-term forecast for a par-

ticular day. The information provided by the Road

Traffic Centre will be easily useable on mobile devices

as well; special applications (“apps”) may be developed

for this purpose.

12

FUN

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SFUNCTIONS AND TASKS OF THE TRAFFIC CONTROLCENTRE

12Functions and tasks

The gathered information enables the TCC

• to monitor the operational facilities,

• to analyse and forecast the traffic conditions,

• to supervise and regulate the traffic control systems.

The continual co-operation of the Road Traffic Centre

specialists – internally with the operators in the control

room and externally with the police and the colleagues

of the TCCs in other German states – decides about

the selection of the optimal traffic management strategy

in case of need.

Basis for the monitoring of facilities and the traffic

conditions are quality-controlled traffic data of the

motorways. In order to receive these data, high-per-

formance software is necessary. For this purpose the

German Federal Ministry of Transport issued a few

years ago the commission to develop and implement a

standard national base system for traffic control centres

(see page 20). This base system is now available.

The TCC has also the important task to monitor all

motorway tunnels in Baden-Württemberg (see page 18).

The Traffic Control Centre Baden-Württem berg

is equipped with most modern technology at the new

location in Stuttgart-Feuerbach. This allows carrying

out the tasks of traffic management even more effi-

ciently. A new, permanently staffed control room was

set up for that purpose. Monitors and large displays

in the control room visualize the data collected along

the route. Based on these representations the operators

are able to monitor the traffic on the federal motorways

in Baden-Württemberg. When needed, they intervene

into the functions of the automatic traffic control systems

and their variable message and dynamic direction signs,

either on a single motorway section or on part of the

motorway network.

The automated traffic control systems and the opera-

tors warn of traffic incidents, harmonize the traffic

flow, warn of fog and wetness, give instructions via

corresponding variable message signs and inform on

alternative routes.

Intelligent traffic management is only possible by means of complex

hardware and software systems. Therefore the Traffic Control Centre is

an integral component of the Road Traffic Centre, as all information

about the road sections of the motorway network of Baden-Württemberg

are gathered there.

1313Functions and tasks

Data input

Thrid data and informationusers (police, German weatherservice ...)

Traffic control centres of other states and municipalities

Traffic control computer/Data processing

Control room with control stationData exchange

TRAFFIC CONTROL SYSTEM

Line control systems with variable message signsRerouting systems with road section information

TUNNEL MONITORING

Visibility measurement

Weather stations/black ice alarm systems

MEASURING POINTS

Strategy coordination

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Operation/traffic management

Counting stations (inductive loop, others)

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SUPERVISED SYSTEMS IN THE

TRAFFIC CONTROL CENTRE

• Variable direction signs

• Line control

• Tunnel monitoring

• Road surface conditions and weather

information system (SWIS)

• Roadside emergency telephones

• Telecontrol system

• Network monitoring

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REROUTING SYSTEMS

REACT FLEXIBLE ON CHANGING TRAFFIC CONDITIONS.

14Traffic management systems – network

These dynamic signs with integrated congestion

information (dWiSta) are used for network manage-

ment. This means that differently from the standard

route the best alternative route is displayed. In most

cases, the signs also display the reason (e.g. congestion)

for the recommended alternative.

When travelling on the motorways in Baden-Württemberg, one frequently

meets them: bridge-like steel structures spanning the entire width of the

motorway, but not carrying the familiar blue signposts with white letters.

In case of rerouting systems, they are equipped with black and white infor-

mation boards. When required, they recommend the best route choice,

depending on the traffic situation.

Studies have shown that, due to preventive diversion

of traffic, up to 20 % less traffic congestion occur and

the traffic on the roads can be managed optimally

and economically.

PRE-PROGRAMMED SOLUTIONS ENABLED

FOR MANUAL INTERVENTION.

Traffic management is a complex task that must have

solutions ready for all kinds of traffic situations on a

motorway section. Numerous parameters are incor-

porated into a program, which calculates the optimal

management strategy and implements the result in

the form of automated rerouting recommendations.

Important is the fact that manual intervention into

the operation is enabled.

Depending on the forecasted or already actual traffic

volume the operators in the TCC can access various

control options stored on the computer. The rerou-

ting systems concerned are then activated to indicate

the best alternative route.

COMMUNICATION AND CO-OPERATION WITH

THIRD PARTIES.

Traffic management using traffic control systems requires

in most cases the communication and co-operation

with public and private institutions.

Co-operation between the involved TCCs across the

federal states is for example necessary for the control

of rerouting systems, if incidents affect the traffic on

motorway sections in a neighbouring federal state

and requires rerouting to alternative routes.

The co-ordination with the responsible authority of

the police is compulsory by traffic law, if unforeseen

events (e.g. accidents) require traffic control measures.

In addition, the existing dWiSta systems are used to

display important information on the traffic situation

as “full closure” or “congestion” including length and

location of the congestion. The aim is to inform the

road users as much as possible about the current traffic

situation.

1515Traffic management systems – network

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SLINE CONTROL AND RAMPMETERING SYSTEMS

These systems increase especially traffic safety. Improved traffic flow and

minimizing travel time for the traffic collective are further effects of these

systems.

Some of the systems have been operating for up to

20 years. With the construction of the system at A8

south of Stuttgart, standard management software

will be created, which in future will be used for

all facilities in Baden-Württemberg in upcoming

modernization of the systems technology at the road.

More detailed information on line control systems

can also be found on www.svz-bw.de

LINE CONTROL SYSTEMS.

Line control systems are applied to warn of traffic

congestion, road works and weather-related hazards

for traffic, as well as to homogenize traffic flow by

automatic operation of variable message signs. In

Baden-Württemberg several systems are in operation

with different focuses, such as fog warning or warning

of truck traffic jam.

16 16Traffic management systems – routes

WWW.SVZ-BW.DE

TEMPORARY HARD SHOULDER RELEASE.

The temporary release of hard shoulders at highly loa-

ded routes allows an increase of the traffic capacity of

up to 25 %. Prior to the release it is verified by video

technology, whether the lane is free. Should a vehicle

break down on the hard shoulder, the hard shoulder

is closed again. Traffic safety is maintained at high level.

This technique will be implemented in Baden-Würt tem -

berg at A8 south of Stuttgart for the first time.

RAMP METERING SYSTEMS.

The aim is to optimize the traffic flow. Ramp metering

divides large incoming vehicle platoons into individual

vehicles or small groups. The rate of incoming vehicles

is not reduced, but enters the highway more evenly.

Thus better merging of the entering vehicles and the

traffic flow on the main road is enabled. A number of

dangerous lane changes and braking manoeuvres can

be avoided and traffic safety increases. In addition, ramp

metering systems help to prevent traffic congestion or

to retard congestion on the main road.

1717Traffic management systems – routes

Tunnels require special safety precautions due to their structural characteristics,

but also due to their psychological impact on many drivers. This includes the

motorway tunnel monitoring by the TCC during 24 hours per day and on

365 days per year.

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ELTUNNEL MONITORING

SAFETY AROUND THE CLOCK .

18Tunnel monitoring

How important the safety of the tunnels is considered, demonstrates the

monitoring and operating system developed as a three-level network (central,

regional, local) and secured several times against failure.

The digital monitoring and operating system allows the observation and control of

all safety-relevant units – from the functions in case of fire and accident through

the control of the monitoring cameras up to the tunnel ventilation. Traffic can be

supervised in future by video cameras in all tunnels. The software of the monitoring

and operation system offers a clear graphical design and the option to select all

functions by a mouse click. In addition the program architecture is designed in a

way that allows to integrate most different tunnel equipment into the system and

thus to control it. In situ the TCC is the communication place for the fire-brigade,

the police and the motorway maintenance authorities.

1919Motorway construction sites

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EMOTORWAY CONSTRUCTION SITES

OPTIMAL PLANNING AND INFORMATION.

Motorway construction sites are frequently the reason for traffic disturbances.

Nevertheless, they are inevitable for maintenance, renewal or extension

purposes. It is therefore particularly important to minimize the disturban-

ces as far as possible.

The Road Traffic Centre Baden-Württemberg has a major role

in supporting on-site construction monitoring by the central con-

struction site coordinator. The traffic impacts of construction sites are

analysed and coordinated afterwards in the best possible way. The

construction site information system is available via the Internet site

www.baustellen-bw.de. Thus, for example, drivers, automobile asso-

ciations, hauliers and private service providers can obtain detailed

information about the road construction sites in Baden-Württemberg.

WWW.BAUSTELLEN-BW.DE

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EMTHE TCC BASE SYSTEM

A HIGHLY SOPHISTICATED IT-SYSTEM.

20TCC base system

Basis for the standard TCC base system is the

commission of the Federal Government placed to

the TCC Working Group of government and federal

states and the Federal Highway Research Institute

(BASt) to develop a standard system. The aim is to

avoid cost-intensive TCC developments, which have

been incompatible so far, in the single states in future.

The structure of this national standard base system is

modular with standard interfaces between the software

units and a data distributor as core component. This

simplifies later extensions or modifications.

Substantial components of the base system are the

data distributor, the archiving system, the complete

range of measurement validation and analysis as well as

extensive technical evaluation software (e.g. congestion

process analysis, time series prognosis, construction

site simulation). Beyond that the integrated software

allows the data exchange with third parties (e.g. police,

weather services).

The TCC base system represents the tasks of a traffic

control centre. The TCC base system does not contain

the control of line control and rerouting systems. The

software needed for this purpose is partly being deve-

loped already in parallel. It builds on the base system

and will be integrated into it. Thus, a national very

advanced TCC system is available, providing the bases

for the representation of the traffic situation, incident

detection and traffic prognosis.

ONE FOR ALL – THE DEVELOPMENT OF THE

NATIONAL STANDARD TCC BASE SYSTEM.

The particular advantage of the system is its conception

as Open Source Software. By means of access to the

original source code, the developers in the TCCs of

other German states have the opportunity to develop

and integrate system elements that are adjusted to their

own needs. At the same time they can use the core

functionalities as before. Also private companies can

install the system and develop e.g. additional software

programs for traffic control centres. A permanent state-

of-the-art development is optimally ensured.

The national standard base system for traffic control centres (BSVRZ)

was implemented on behalf of the federal government. This TCC base

system can be generally applied in every other federal state with small

efforts for special adaptations.

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TRAFFIC MONITORING BADEN-WÜRTTEMBERG

TRAFFIC COUNTS AND ANALYSES – AUTOMATIC AND EFFICIENT.

22Traffic monitoring

Traffic monitoring replaces in Baden-Württemberg as the first state the

previous manual traffic counts in a 5-years’ interval by automatic traffic

counts.

In 2010 the traffic counting and analysis system

“Traffic Monitoring” was applied for the first time in

a federal state and on a large scale. Automatic traffic

counts at approximately 3,140 sites were made on state

and county roads in Baden-Württemberg (approxi-

mately 80 % of all traffic counting sites of these road

categories) by means of mobile side-radar-based

counters on roadside posts.

During regular operation since February 2011, the traffic

is – evenly distributed across the state – being counted

at every fifth census point twice each year for a period

of two weeks. This means, all 6,000 sites are counted

in five years in the defined measurement period (2 x

2 weeks). Special counts and analyses are feasible in

the short term.

IMPROVED DATA BASE.

Each individual vehicle is automatically counted

including travel direction, speed and classification

(passenger cars, trucks, etc.) continuously during

the selected counting period.

In 2010, the traffic was counted at all measuring sites

for at least 7 days continuously and around the clock.

This provided a much more extensive extrapolation

basis than before based on previous censuses. For the

first time, also night data could be collected over longer

time periods.

In order to improve the data base of the secondary

road network, almost 100 devices were implemented

2323Traffic monitoring

in February 2011 as stationary so-called “permanently

counting measuring points” including counts of at

least one calendar year.

PROMPT ANALYSIS.

Due to the automatic transfer of data and the locati-

on detection via GPS, the raw data and count results

are available in the Intranet of the road administrati-

on after a short processing time.

TRAFFIC MONITORING AS A STANDARD.

With this new method Baden-Württemberg takes a

leading role in Germany. Many other federal states

have decided to use traffic monitoring as new standard

method for road traffic census.

In future, the traffic growth in Baden-Württemberg

can be analysed annually on national motorways,

federal, state and county roads, not only every five

years.

www.svz-bw.de

MINISTRY OF TRANSPORT AND INFRASTRUCTURE

REGIONAL COMMISSION TÜBINGEN – STATE OFFICE FOR ROAD ENGINEERING BADEN-WÜRTTEMBERG