Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
The Wayback Machine - https://web.archive.org/all/20061230220729/http://www.trafficwatchni.com:80/urban_road_network.asp
Vehicle Actuation
Traffic signals operating in
isolation are controlled by vehicles passing
over inductive loops buried in the carriageway
and inserting a demand for (or extension to)
the vehicle green signal on that approach.
MOVA
Some isolated junctions on heavily trafficked
roads can have significant variations in
traffic flows throughout the day. The MOVA
(Microprocessor Optimised Vehicle Actuation)
system has been developed for these situations
and can automatically alter the traffic
signal settings to suit the volume of traffic
on each approach. Roads Service has a number
of MOVA installations and will continue
to apply this technology at appropriate
locations.
Urban
Traffic Control (UTC)
In areas densely populated by traffic signals,
Urban Traffic Control (UTC) can provide
the following benefits:
Enables the progression of traffic
flows by co-ordinating the traffic signal
timings.
Reduces journey times and delays.
Improves road safety.
Provides electronic fault monitoring
of traffic signals.
Provides 'green wave' routes for emergency
vehicles.
Provides control facilities for car
park management and driver information
systems.
The
first UTC system in Belfast was commissioned
in 1980. Since then the number of equipment
under the control of the system has expanded
greatly. In 1994, Roads Service upgraded the
UTC system and integrated it with the motorway
control system being provided for the M3 Lagan
Bridge. This integrated system is one of the
most advanced traffic control systems in Europe.
SCOOT (Split Cycle Offset and Optimisation Technique)
The original UTC system was upgraded in 1994, and was
further enhanced in 1997 by the installation of SCOOT
in Belfast City Centre and the important Saintfield
Road Southern Approaches corridor. SCOOT is a dynamic
traffic control system which measures the traffic flow
at each junction and then adjusts traffic signal timings
to suit the actual traffic volumes.
Extending the Urban Traffic Control System
Where appropriate, the Belfast UTC system will be
extended to provide traffic control in other
areas. For example, the system has been extended
to include traffic signals in Lisburn and
also those on the A2 route between Bangor
and Belfast, where traffic flows are in excess
of 40,000 vehicles per day. A satellite to
the UTC system in Belfast has been established
in Craigavon at the headquarters of Roads
Service, Southern Division. In addition to
Craigavon, other towns such as Newry, Armagh
and Portadown can also benefit from the technology.
