Editing Ramp meter (section)

== Ramp metering in Europe ==
Ramp metering has been installed in several countries in Europe, including the United Kingdom, Germany and the Netherlands. A research project, ''EURAMP - European Ramp Metering Project'',  funded by the European Union was completed in March 2007. The EURAMP Project Deliverables<ref>{{Cite web|url=https://trimis.ec.europa.eu/project/european-ramp-metering-project#tab-docs|title=European Ramp Metering Project - TRIMIS - European Commission|date=15 April 2013}}</ref> included information about the results of ramp metering in a number of locations and situations, and whether they were helpful in those situations, and a ''Handbook of ramp metering''.

=== United Kingdom ===
[[File:Carnell A19 Site 4 Ramp Metering.jpg|thumb|Ramp Metering on the A19 in Middlesbrough.]]
The first trial in the UK was on the M6 J10 near Walsall in 1986.  No more sites were developed for the next two decades until a second 'pilot' study in 2006 by the Highways Agency (HA) concluded that ramp metering provides a net benefit under certain conditions - generally more congested junctions. A Summary Report<ref>{{cite web |url=http://www.highways.gov.uk/knowledge/documents/Ramp_Metering_Summary_Report.pdf |title=Archived copy |access-date=2012-06-13 |url-status=dead |archive-url=https://web.archive.org/web/20120912142144/http://www.highways.gov.uk/knowledge/documents/Ramp_Metering_Summary_Report.pdf |archive-date=2012-09-12 }}</ref> by the HA, dated November 2007, includes an overview of the background and history, international experience, limitations, system operation, algorithms and implementation of ramp metering. In its conclusion it "envisaged ramp metering will be deployed more widely in the coming period." Ramp metering was then introduced widely in England - Phase 1 involved the implementation of approximately 30 sites and was completed by 2008. Phase 2 followed and as of March 2011 there are 88 Ramp Metering sites<ref>{{cite web |url=http://www.highways.gov.uk/knowledge/17378.aspx |title=Highways Agency - Ramp Metering |access-date=2011-05-09 |url-status=dead |archive-url=https://web.archive.org/web/20100930161510/http://www.highways.gov.uk/knowledge/17378.aspx |archive-date=2010-09-30 }} Highways Agency - Ramp Metering</ref> on the 4,500 miles (7,242 km) of strategic highways operated and maintained by the HA.

=== The Netherlands ===
The first ramp metering in the Netherlands was introduced in 1989. Ramp metering is being introduced more widely in the Netherlands after a pilot study by the [http://www.rws-avv.nl AVV Transport Research Centre] which concluded that ramp metering can provide a small benefit for the traffic flow on the highway, leading to a higher capacity. Ramp meters can also contribute to decreasing '[[Rat Run|rat running]]'. By 2006 50 ramp meters were installed. This number increases by 4 to 5 each year.

=== Germany ===
Ramp metering has been implemented on [[Autobahn]]s in several areas in Germany, including the Rhine-Ruhr area, Munich, and Hamburg.

=== Italy ===
Ramp metering has been implemented on [[Tangenziale di Venezia]] (A57) as temporary solution for the increased traffic before the definitive solution (building of the [[Passante di Mestre]]).

=== Ireland ===
There is one metered ramp in Ireland, located at J1 on the [[M1 motorway (Republic of Ireland)|M1 Motorway (Ireland)]] Northbound. It is on the entry ramp from Coolock Lane, and is used when the M1 gets congested due to the M1 Port Tunnel and the M1 meeting further up.<ref>{{Cite web |title=Coolock Interchange - Roader's Digest: The SABRE Wiki |url=https://www.sabre-roads.org.uk/wiki/index.php?title=Coolock_Interchange |access-date=2023-12-13 |website=www.sabre-roads.org.uk}}</ref>
=== Poland ===
The first two ramp meters in the country were installed in 2022 on two on-ramps on [[Expressway S2 (Poland)|expressway S2]] in Warsaw. These are the last on-ramps before the entrance of [[Expressway S2 Tunnel, Warsaw|the Ursynów Tunnel]] both eastbound and westbound.{{citation needed|date=January 2024}}