Editing Ramp meter (section)

=== Australia ===
{{Unreferenced section|date=March 2016}}
The largest ramp metering network in the country is in [[Melbourne]] (managed and controlled through [[VicRoads]]) on the [[Eastern Freeway, Melbourne|Eastern Freeway]] and most of all, on the entire inner-city M1 route which includes the [[Monash Freeway]], the [[CityLink]] [[Tollway]], the [[West Gate Freeway]] and the metropolitan section (south of the beginning of the [[Monash Freeway]]) for the [[Princes Freeway]]. There are also various ramp meters on the inner-city section of the [[Calder Freeway]]. [[Brisbane]]'s [[Pacific Motorway (Brisbane–Brunswick Heads)|Pacific Motorway]] and [[Bruce Highway]] (S/Bound Caboolture - Gateway Mwy) also uses ramp metering on some on-ramps, as does the northbound on-ramps of [[Perth]]'s [[Kwinana Freeway]] between [[Roe Highway|Roe]] and [[Canning Highway]]s. On most motorways, ramp metering is activated when sensors indicate that traffic is heavy, however, some motorways without sensors use time-based activation.

The 2010 M1 Upgrade in Melbourne installed 62 ramp meters that are coordinated using the HERO suite of algorithms developed by Markos Papageorgiou and Associates from the [[Technical University of Crete]]. The system was built on the [[STREAMS Integrated Intelligent Transport System|STREAMS]] platform and utilises the state-of-the-art ITS architecture. All the ramps can be linked when required to resolve motorway bottlenecks before they emerge.  The results of a trial improved capacity by 9% over the previous fixed-time ramp-metering system, average speeds increased by 20&nbsp;km/h (12 MPH) and traffic throughput at bottleneck locations can be reliably maintained around 2200&nbsp;PCE per lane.  The HERO system takes real time data every 20 seconds from the motorway, ramps and arterial road in order determine the best signal timing for the next 20 seconds. The data detection system comprises Sensys detectors in every freeway lane at 500&nbsp;m (1,640 feet ) spacings with a minimum detectors at three locations on each ramp including the freeway entrance with the arterial road.  The system also manages the arterial road interface with the freeway, balances ramp queues and delays across ramps, and is capable of managing bottlenecks 3–4&nbsp;km (1.8 - 2.4 mi) downstream of a ramp entrance.  The system is also supplemented by real-time travel-time information to key destinations and incident and congestion information displayed on specially designed full-colour VMS on the approaches to the freeway entrance ramps.  This information provides sufficient advice for motorists to determine whether or not to use the freeway during incidents etc. The system also provides dynamic ramp closure in the event of a major incident.

Ramp metering was introduced on the Rozelle Interchange in Sydney in 2024 to alleviate congestion for Victoria Rd users, after lengthy delays and back-ups through Drummoyne and Rozelle and onto the Anzac Bridge.<ref>{{Cite web|url=https://www.transport.nsw.gov.au/projects/current-projects/rozelle-interchange |title=Rozelle Interchange connects the M4 to the Anzac Bridge and the M8 to City West Link and Victoria Road |website=Transport for NSW |date=15 February 2024 |access-date=2024-07-16}}</ref>