Managing Traffic Incidents - University of Queensland
Managing Traffic Incidents - University of Queensland
Managing Traffic Incidents - University of Queensland
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(Continued from page 29)<br />
Each toll gantry has a roadside computer to<br />
store data and to transmit data to the central<br />
computers at the City link Control Room. Each<br />
subsystem is dedicated to serving a zone <strong>of</strong> the<br />
highway: the vehicle enters the classification<br />
zone prior to the changing zone. Finally, if the<br />
vehicle rear license plate is to be recorded<br />
(optional) the image is captured in the enforcement<br />
zone. These zones overlap and their relative<br />
sizes and positions is known collectively as<br />
the system 'geometry' as shown in the figure<br />
above.<br />
The combination <strong>of</strong> proven system geometry,<br />
backed up by extensive field trials and simulation<br />
demonstrated that a single gantry design<br />
was possible for reliable e-TAG device and<br />
CityLink Pass operation. Meeting the charging<br />
and enforcement accuracy requirements in a<br />
pleasing gantry design was possible while ensuring<br />
accurate charging and enforcement for<br />
vehicles driving at twice the speed limit without<br />
compromising security. The same Tolling Point<br />
geometry is applicable to areas prone to congestion<br />
and interurban highways subject to frequent<br />
high speed traffic and a combination <strong>of</strong><br />
commuters, commercial vehicles and visitors -<br />
a mix typically found in interurban corridors.<br />
The complete City Link concession area is<br />
served by nine Tolling Points, each comprising<br />
a CEN standards-compliant DSRC system,<br />
stereoscopic Vehicle Detection and Classification,<br />
an array <strong>of</strong> Vehicle Recognition cameras<br />
and associated low impact lighting.<br />
Every vehicle using the highway has either to<br />
apply for an e-TAG device or use the innovative<br />
CityLink Pass system that matches a vehicle's<br />
license plate with a prepaid CityLink Pass<br />
list. The two methods work together and provide<br />
commuters and casual users alike with the<br />
possibility to pay tolls at mainline speeds.<br />
Purchase or Payment<br />
Customer service<br />
The CityLink Pass system serves infrequent<br />
users and also serves those motorists who wish<br />
to try the City Link before applying for an e-<br />
TAG device. CityLink Pass allows unlimited<br />
travel on the City Link on any nominated day<br />
and can be purchased in advance with a credit<br />
card by phone or by midday <strong>of</strong> the day following<br />
travel. CityLink Pass effectively makes the<br />
City Link available to both commuters and visitors.<br />
Embracing all Users - a Tag or a Daypass?<br />
One <strong>of</strong> the major challenges <strong>of</strong> a fully electronic<br />
toll system is to ensure that the system is<br />
also convenient for all users, whether or not<br />
they have an e-TAG device. So the concept <strong>of</strong><br />
CityLink Pass was born. Drivers merely have to<br />
call the CityLink Pass <strong>of</strong>fice before they travel,<br />
or visit a customer centre, or use one <strong>of</strong> many<br />
Touch kiosks located at Shell service station<br />
outlets across the state, and by giving their<br />
credit card number and license plate details,<br />
they can register to use the highway for an<br />
unlimited number <strong>of</strong> times during any 24 hour<br />
period they choose.<br />
CityLink Passes proved to be very popular<br />
with infrequent users and daily sales have been<br />
over 5,000. When a CityLink Pass registered<br />
vehicle travels past the Tolling Point an image<br />
<strong>of</strong> the license plate is captured by digital cameras<br />
mounted on each gantry and the decoded<br />
numbers compared with the CityLink Pass List.<br />
If there is a match the user is allowed to pass.<br />
The same camera system is also used for enforcement.<br />
Vehicles without a valid e-TAG account<br />
and not on the CityLink Pass list are recorded<br />
by means <strong>of</strong> the digital image taken by<br />
the roadside cameras. This image is confirmed<br />
by the Link Operator and a check is made to<br />
ensure that the vehicle is not linked to an ac-<br />
Accounts can be topped up on line<br />
CityLink Customer Centres<br />
Shell Touch Outlets<br />
an electronic self-contained vending unit, which in addition<br />
to selling other products and services, sells CityLink<br />
Passes and accepts Account Top Ups for Standard<br />
Accounts<br />
Australia Post Offices<br />
Automated telephone service 13 26 29<br />
Mail<br />
using a credit card<br />
CityLink Passes; e-TAGs and top up account<br />
electronic Touch Machines have been installed in 120<br />
Shell Touch Outlets across Melbourne and Victoria - they<br />
dispense all types <strong>of</strong> CityLink Passes and allow customers<br />
to top up their CityLink Accounts. The machines accept<br />
debit cards (EFTPOS) as well as all credit cards<br />
sell CityLink Passes; e-TAGs and can top up accounts<br />
CityLink Passes; e-TAGs and find out account balance or<br />
top up account<br />
Can open a CityLink Account by mail, print out Application<br />
form from web site<br />
30 DECEMBER 2001