Hertfordshire County Council is upgrading its intelligent transport systems to better manage traffic flow. The projects include renewing its urban traffic control system, implementing a UTMC common database, installing automatic vehicle location systems to provide real-time passenger information, using automatic number plate recognition for journey time monitoring, deploying variable message signs, integrating car park guidance signs, and expanding its closed circuit television network. The goals are to modernize aging infrastructure, improve network performance through active traffic management, and increase multi-agency coordination.

1. www.hertsdirect.org
INTELLIGENT TRANSPORT SYSTEMS
Presentation by
Chris Gladwyn
Traffic Control Systems
Hertfordshire Highways

2. www.hertsdirect.org
Aims and Objectives
• Integrate new and existing Network Management Systems in
Hertfordshire
• Future proof technology
• Actively manage HCC Network
• Integrate HCC, HA & neighbouring LA strategies
• Build Integrated Traffic Control Centre

3. www.hertsdirect.org
Hertfordshire ITS Projects
• Urban Traffic Control system (UTC) renewal
• Urban Traffic Management & Control (UTMC)
common database
• Automatic Vehicle Location (AVL) / Real Time
Passenger Information (RTPI)
• Automatic Number Plate Recognition (ANPR)
• Variable Message Signs (VMS)
• Car Park Guidance Signs (CPGS)
• Closed Circuit Television (CCTV)

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UTC Renewal
Existing instation system
• Supplied by Peek Traffic Ltd in 2000
• Owned by HCC
• Identified as life expired
• System unstable, 85 software patches
• Does not have functionality to meet future aspirations and LTP
objectives

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Overview of UTC Architecture
TSC
OTU
TSC
OTU
TSC
OTU
TSC
OTU
TSC
OTU
UTC
Server
Hertfordshire County Council’s
Existing UTC
Firewall
Mouchel
Network
Terminal
Dummy
Terminals
Remote Access Visual reference only
(Hatfield Tunnel, Police, etc)

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UTC Renewal
Outstations
• Replace existing legacy Outstation Transmission Units (OTU’s)
• Bring compliance with UTMC principles
• Embracing the efficiencies of IP transmission

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UTC Renewal - Benefits
• The UTC system runs SCOOT (Split Cycle Offset Optimisation
Techniques) software.
• SCOOT achieves an average saving in delay of about 12% over
validated Fixed Time Plans.
• Additional savings of 3% per year are likely for every year that a
Fixed Time Plan ages.
• Communication costs reduced by approx. 60%

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UTC Renewal
Timescales
• Contract award September 2010
• System delivered February 2011

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UTMC Common Database (CDB)
CDB is the UTMC central hub, enabling
• A coordinated, centralised approach to monitoring and
managing traffic
• A traffic and travel website
• Distribution of transport information via the media
(radio/TV/Smart phones)
• A consolidated, single user interface
• Close co-ordination with adjoining Local Authorities and
the Highways Agency
Contributes to a number of LTP objectives

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Existing HCC System Architecture
Telent
Fault Management
Hosted by Telent under
traffic signals
maintenance contract
Roadside Equipment
Watford
Roadside
Systems
Highways House
FEP 1
Confirm
2 x Remote
Laptops
Peek RMS
WISNET v2.1
(H) HCC, (S) Peek
Siemens RMS
RMS for Windows iss. 7
(H) HCC, (S) Siemens
Tyco CCTV
Cam Control PRO v3.65
ANPR
Peek UTC - SCOOT Version 4.5
(H) Peek/MainDec, (S) Peek
FEP 2
RMS
(H) owned by HCC, not
maintained, (S) Unknown
Stored on Partnership
Network
125 VAS
4 Fire station priority
systems 12
169 Junctions Pedestrian Crossings
6 x
CCTV
& Recording
2 x
Wig-wag
1 x
Bollard in
Ware
User Interface
(H, S) Mouchel
Partnership PCs
User
Terminal
Roadside Equipment
? x
ATCC
Maintenance
Files
Telent FMS / Asset DB
Kolara v.8.17
ASTRID
INGRID
6 x
Car Park
Info. Signs
in St Albans
Dambach
Watford VMS
Harlequin CDC
PSTN
(BT)
Pump Monitoring
(H) Unknown, (S)
Unknown
Pump Monitoring
Tunnel Monitoring
(H) Unknown, (S) Unknown
Baldock Tunnel SCADA
(H) Unknown, (S) Unknown
Macs Solns Bollard RMS 1
Watford CCTV Monitoring 2
Notes
Last updated 29/4/10
1. Paxton Access software programs key fobs (used to lower the bollard in Ware) and logs all
activity related to access. MX4 scada software is used for bollard control and monitoring. The
Macs Solutions bollard RMS software will be transferred to the Siemens RMS PC.
2. ADSL connection from Eclipse using D-Link routers. Images from a single camera can be
viewed in Highways House. Watford CCTV control centre (at Charter Place) have to be called
to request camera switching.
3. Routers are provided by Regional Services Ltd (RSL) and are Wetermo model DR-200 or
DR-250.
4. Westermo DR-250 router fitted with Vodafone SIM card supplied by Dambach.
5. Westermo DR-250 router supplied by Dambach.
6. Router with Vodafone SIM card.
7. Car park data transferred via hard-wired link (along side of building).
8. Uses port on D-Link DSL 524T modem that is for ePIPs in Highways House.
9. DSL routers.
10. Church, Gade, Charter/PA, Queens, Kings, Sutton.
11. Maltings – ADSL, London Road – GSM, Bricket Road – ADSL, Multi Storey – ADSL,
Christopher Place – unknown.
12. Watford, Potters Bar, Hertford, Cheshunt.
Watford Control Centre
(Charter Place)
CPMG
Dambach VMS
(H, S) Dambach
Herts Constabulary
(North Watford Police Station)
Asset Management
(H, S) HCC
Hertfordshire ITS Systems Architecture
D
ial-up
ADSL
ADSL
EPS42(BT)
18privatecircuits
Fibre
ADSL(BT/Eclipse)
Ethernet
Partnership
N
etw
ork
Router 3
5 x
Car Park
Monitors
Traffic Signals
27 Routers 3
G
SM
(Vodafone)
38
SIM
C
ards
2xPSTN
(BT)
Various
11
ANPR
Cameras
ANPR Data
2 x
VMS
GPRS
6 x
Car Park
Monitors 10
? X
Watford
CCTV
FibreCar Park Data 7
56K modem
2 x 56K modems
3 x
Bus Access
1 x
Tunnel
Control
2 x
Pump
Stations
Dial-up
56K modem
56K modem
42 x
ePIPs
Routers 8
Partnership Network
Sonic Firewall
Alpha
GPRS
Internet
Internet
ADSL for
CCTV 2
ANPR
GPRS
Routers 4
Router 5
91 x
Departure
Screens
(25 sites)
Router 9
? x
Air Quality
Monitors
? x
Meteorologic
al Sensors
14 Shuttle Signals
DEC Server
2 x
Car Park
Info. Signs
Router 6
Routers 6
Watford Ring
Road CCTV
Car Park
Systems
Watford CCTV
Ring Road Only
Internet
324 Pelican
61 Puffin
42 Toucan
2 Pegasus
Key
(H) Hardware maintainer
(S) Software support / maintainer
(H, S) Hardware and software maintainer

11. www.hertsdirect.org
Overview of UTMC Architecture
· Journey planning
· Transport information
· Network alerts
· Network performance
· Transport performance
· Equipment performance
· ANPR Journey Time Cameras
· UTC SCOOT Signals
· Traffic Counter Classifiers
· Automatic Vehicle Location (AVL)
· Road Works Data
· CCTV
· Car Park Systems
· Air Quality Monitors
· Meteorological Systems
· HA Traffic Control Centre
· Remote Monitoring Systems
· Fault Management Systems
Existing / Future
Sub-systems
Direct Communications
Remote
Systems
Operators
Signals
(UTC)
V M S
Message Signs
User Front
End
Operators
Hertfordshire Highways
Common
Database
Access ControlVoice/SMS
www
Other
Databases
E.g. Confirm
Other Users
Adjoining LAs, HA, Fire, Police, etc.
Network and System Data
Network and System Information
Transport Management Tools
Kiosks / ePIPs
Strategy
Supervisor
In-vehicle Systems
(Future)

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UTMC CDB – Interdependencies
• Common Database interfaces with all ITS Systems
• Web portal may require links to corporate networks
• Council staff may want access to functions of the CDB

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UTMC CDB
Time Scales
Contract award October 2010
System delivered February 2011

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AVL/RTPI - Objectives
• Provide reliable real-time information to passengers through a
variety of systems and communications media
• Provide a voice and data communications platform
• Enable bus priority at traffic signals
• Provide a vehicle location and control system
• Be compatible with AVL/RTPI systems operating in other counties
and with other transport providers
• Enhance passenger security
• Provide information to drivers to aid timekeeping

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AVL/RTPI Architecture

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AVL/RTPI - Benefits
• Modal shift
– +1% increase in passengers across London
– +5% in Bristol and Liverpool
– +8% in East Kent
– +28% Leicester
• Benefits
– 9 seconds reduction of delay per bus per junction in London at
VA sites with traditional priority
– 10 to 20+ seconds reduction of delay per bus per junction in
Leeds at VA sites with intelligent priority
– 18% reduction in journey time on a route in Gateshead

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AVL/RTPI
Time Scales
Contract award March 2010
System delivered February 2011-2016

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Automatic Number Plate Recognition (ANPR)
Journey Time Monitoring System (JTMS)
• Journey Time Measurement using ANPR
provides traffic data by identifying the same
vehicle at two or more points in a road
network from the recognition of the
vehicle's number plate.
• ANPR cameras are strategically deployed
to capture number plates along road
networks providing real time monitoring,
which in turn formulates travel times along
the road network.

19. www.hertsdirect.org
ANPR/JTMS - Benefits
• Live monitoring of the effectiveness of traffic management schemes
• Early warning of traffic incidents
• Improve journey time reliability
• Reduce disruption caused by major incidents
• Provide alternative route advice to minimise the effect of congestion
and incidents
• Minimise delays due to roadworks
• Influence road users' decisions before they set out on a journey
about route, time and means of travel
• Reduce the effects of congestion

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Variable Message Signs (VMS)
• Provision of information in a timely manner
• Local incident management
• Reduction in delay
• Supporting diversion routes and controlling traffic on these routes

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Car Park Guidance Signs
• Excess queues at car parks;
• Congestion on the surrounding road network;
• Poor air quality
Provides greatest benefit when demand for
off-street parking is approximately equal to
supply

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CCTV
• Incident detection and management
• Provide traffic information through various
media services
• Manage traffic in urban areas through the
use of an UTMC system
• Monitor weather conditions of highway

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INTELLIGENT TRANSPORT SYSTEMS
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