View source for FL4 (Lazio regional railways)

{{Use dmy dates|date=August 2020}}
{{Infobox rail line
 | box_width     =
 | name          = Roma Termini–<br />Frascati/Albano Laziale/Velletri
 | color         = {{rcr|FL lines|FL4}}
 | logo          = Ferrovia regionale laziale FL4.svg
 | logo_width    = 30px
 | logo_alt      = FL4
 | image         = JazzRomaTibu.jpg
 | image_width   = 
 | image_alt     = 
 | caption       = FL4 Jazz towards Velletri, arriving in [[Roma Tiburtina]]
 | type          = [[Regional rail]]
 | system        = [[Lazio regional railways]]
 | status        = Operational
 | locale        = [[Rome]], Italy
 | start         = [[Roma Termini railway station|Roma Termini]]
 | end           = [[Frascati railway station|Frascati]] /<br />[[Albano Laziale railway station|Albano Laziale]] /<br />[[Velletri railway station|Velletri]]
 | stations      = 
 | routes        =
 | daily_ridership = 55,000
 | ridership2    =
 | open          = 1994
 | close         =
 | owner         =
 | operator      = [[Trenitalia]]
 | character     =
 | depot         =
 | stock         = [[FS Class E.464|E.464]], [[Jazz (Italian EMU)|Jazz]]
 | linelength    = {{convert|24|km|mi||abbr=on}} /<br />{{convert|29|km|mi||abbr=on}} /<br />{{convert|41|km|mi||abbr=on}}
 | tracklength_km= 
 | tracklength_mi= 
 | tracklength   = 
 | tracks = 
 | gauge         = {{RailGauge|sg}}
 | old_gauge =
 | load_gauge = 
 | minradius     =
 | routenumber =
 | linenumber    = FL4
 | electrification = 3,000 [[Volt|V]] [[Direct current|DC]]
 | speed         = {{convert|44|km/h|abbr=on}} (ave) /<br />{{convert|39|km/h|abbr=on}} (ave) /<br />{{convert|48|km/h|abbr=on}} (ave)
 | elevation_m   =
 | elevation_ft  =
 | elevation     =
 | mapcolour     = 
 | website       = [https://www.trenitalia.com/en.html trenitalia.com]
 | map           = [[File:Roma - mappa linee FL.svg|thumb|center|The Lazio regional railways network.]]
 | map_state     = show
}}

The '''FL4''' (until 2012 '''FR4''') is a [[regional rail]] route.  It forms part of the network of the [[Lazio regional railways]] ({{langx|it|ferrovie regionali del Lazio}}), which is operated by [[Trenitalia]], and converges on the city of [[Rome]], Italy.<ref name=fmer/>

The route operates over the infrastructure of the [[Rome–Cassino–Naples railway|Rome–Cassino–Naples]], [[Rome–Albano railway|Rome–Albano]], [[Rome–Frascati railway|Rome–Frascati]] and [[Rome–Velletri railway|Rome–Velletri]] railways.  Within the territory of the ''[[comune]]'' of Rome, it plays the role of a [[commuter rail]]way.<ref name=lffr4a/> It is estimated that on average about 55,000 passengers travel on an FL4 train each day.

The designation FL4 appears only in publicity material (e.g. public transport maps), in the official timetables, and on signs at some stations.  The electronic [[destination board]]s at stations on the FL4 route show only the designation "R" and the relevant train number.<ref name=lffr4a/>

== Route ==

* [[File:Ferrovia regionale laziale FL4.svg|20px|FR4]] [[Roma Termini railway station|Roma Termini]] ↔ [[Ciampino railway station|Ciampino]] ↔ [[Frascati railway station|Frascati]] / [[Albano Laziale railway station|Albano Laziale]] / [[Velletri railway station|Velletri]]

The FL4, a [[radial route]], runs from [[Roma Termini railway station|Roma Termini]], on the southern perimeter of Rome's city centre, in a south easterly direction, via the Rome–Cassino–Naples railway, to [[Ciampino railway station|Ciampino]], and then fans out into three branches, to [[Frascati railway station|Frascati]], [[Albano Laziale railway station|Albano Laziale]] and [[Velletri railway station|Velletri]], respectively.<ref name=lffr4a/>

==History==
The first of the three FL4 branches to see the light was the Rome–Frascati railway, opened on 7 July 1858, during the [[Papal States|reign]] of [[Pope Pius IX|Pius IX]].  At that time, the Roman terminus was located in Piazza di Porta Maggiore, and Frascati was more rural in nature.
 
Five years later, Roma Termini station was inaugurated, coinciding with the opening of the line to Velletri (continuing to Caserta and Naples). The line to Albano Laziale was opened in October 1889, on the formation of an earlier tramway from [[Roma Tiburtina railway station|Tiburtina station]].
 
All of these lines were later electrified to improve performance.  Given the increase in passenger traffic after World War II, they also started to establish themselves as commuter lines; simultaneously, freight traffic shrank drastically to the point where it disappeared. Signalling was managed by a manual electric block system. <small>([[:it:Blocco elettrico manuale|IT]])</small>
 
On 27 January 1992, an accident at Casabianca on the Velletri line killed 6 people and injured 124. As a result, a Central Operational Manager (DCO) <small>([[:it:Dirigente centrale operativo|IT]])</small> was based in Ciampino to control the Albano Laziale and Velletri lines, while the line to Frascati was similarly managed as far as Ciampino.
 
With the approach of the [[Great Jubilee]] of the year 2000, renovation and upgrading work was begun on the Rome-Velletri line; this work included the transformation of the stops at [[Pavona railway station|Pavona]] and [[Lanuvio railway station|Lanuvio]] into stations, the creation of the ''San Gennaro'' stop, and the renovation of several buildings at the stations. On the Rome-Albano Laziale line, the ''Villetta'' stop was restored. In early 2000, the disused track no. 1 at Frascati was closed and disconnected from track no. 2.

== Stations ==
The stations on the FR4 are as follows:<ref name=fr4/>
* '''[[Roma Termini railway station|Roma Termini]]'''&nbsp;[[File:Metropolitana di Roma - logo linea A.svg|Line A|25px|link=Line A (Rome Metro)]]&nbsp;[[File:Metropolitana di Roma B.svg|25px|Line B|link=Line B (Rome Metro)]]&nbsp;[[File:Ferrovia regionale laziale FL5.svg|22px|FL5|link=FL5 (Lazio regional railways)]]&nbsp;[[File:Ferrovia regionale laziale FL6.svg|22px|FL6|link=FL6 (Lazio regional railways)]]&nbsp;[[File:Ferrovia regionale laziale FL7.svg|22px|FL7|link=FL7 (Lazio regional railways)]]&nbsp;[[File:Ferrovia regionale laziale FL8.svg|22px|FL8|link=FL8 (Lazio regional railways)]]&nbsp;[[File:Ferrovia_Roma-Giardinetti.svg|30px|Roma Giardinetti|link=Rome–Giardinetti railway]]&nbsp;[[Leonardo Express|{{RoundedBox|LeoExp|Yellow|#002050|#002050}}]]
* [[Capannelle railway station|Capannelle]]&nbsp;[[File:Ferrovia regionale laziale FL6.svg|22px|FL6|link=FL6 (Lazio regional railways)]] (limit of urban service)
* [[Ciampino railway station|Ciampino]]&nbsp;[[File:Ferrovia regionale laziale FL6.svg|22px|FL6|link=FL6 (Lazio regional railways)]]

''Frascati branch''
* '''[[Frascati railway station|Frascati]]'''

''Albano Laziale branch''
* [[Acqua Acetosa railway station|Acqua Acetosa]]
* [[Sassone railway station|Sassone]]
* [[Pantanella railway station|Pantanella]]
* [[Marino Laziale railway station|Marino Laziale]]
* [[Castel Gandolfo railway station|Castel Gandolfo]]
* [[Villetta railway station|Villetta]]
* '''[[Albano Laziale railway station|Albano Laziale]]'''

''Velletri branch''
* [[Casabianca railway station|Casabianca]]
* [[Santa Maria delle Mole railway station|Santa Maria delle Mole]]
* [[Pavona railway station|Pavona]]
* [[Cancelliera railway station|Cancelliera]]
* [[Cecchina railway station|Cecchina]]
* [[Lanuvio railway station|Lanuvio]]
* [[San Gennaro railway station|San Gennaro]]
* [[Sant'Eurosia railway station|Santa Eurosia]]
* '''[[Velletri railway station|Velletri]]'''

== Rolling stock ==
FL4 services are commonly operated during [[rush hour]] by [[FS Class E.464|E.464]] class [[electric locomotive]]s hauling [[Bilevel rail car|double-decker coaches]].<ref name=lffr4f/><ref name=lffr4v/>

== Scheduling ==
===Rome–Frascati===
 
These services are included in the Trenitalia official timetable M72 ''Frascati–Ciampino–Roma''.

{{As of|2012}}, the services ran to an hourly [[clock-face scheduling|clock-face schedule]], with more frequent trains during [[rush hour]].  Average travel time for the whole trip is 29 minutes.<ref name=lffr4f/> On the Rome-Ciampino section, FL4 services to and from the three FL4 branches operate about once every 20 minutes, but not to a clock-face schedule.

===Rome–Albano Laziale===

These services are included in the Trenitalia official timetable M73 ''Albano Laziale–Roma''.

{{As of|2012}}, the services ran to an hourly clock-face schedule, with more frequent trains during [[rush hour]].  Average travel time for the whole trip was around one hour.<ref name=lffr4a/> On the Rome-Ciampino section, FL4 services to and from the three FL4 branches operate about once every 20 minutes, but not to a clock-face schedule.

===Rome–Velletri===

These services are included in the Trenitalia official timetable M74 ''Velletri–Roma''.

{{As of|2012}}, the services ran to an hourly clock-face schedule, with more frequent trains during [[rush hour]].  Average travel time for the whole trip was about 50 minutes.<ref name=lffr4v/> On the Rome-Ciampino section, FL4 services to and from the three FL4 branches operate about once every 20 minutes, but not to a clock-face schedule.

== See also ==
{{Portal|Trains}}
* [[History of rail transport in Italy]]
* [[List of railway stations in Lazio]]
* [[Rail transport in Italy]]
* [[Transport in Rome]]

== References ==
{{reflist|refs=
<ref name=fmer>{{cite web |title=Ferrovie metropolitane e regionali – Informazioni |url=http://www.060608.it/en/print/trasporti/muoversi-in-citta/con-le-ferrovie-regionali/ferrovie-metropolitane-e-regionali-informazioni.html |work=060608 website |publisher=Roma Capitale |accessdate=9 November 2012 }} {{in lang|it|en}}</ref>
<ref name=fr4>{{cite web |title=FR4: Roma Termini – Ciampino – Frascati/Albano Laziale/ Velletri |url=http://www.060608.it/en/trasporti/muoversi-in-citta/con-le-ferrovie-regionali/fr4-roma-termini-ciampino-frascati-albano-laziale-velletri.html |work=060608 website |publisher=Roma Capitale |accessdate=11 November 2012 }} {{in lang|it|en}}</ref>
<ref name=lffr4a>{{cite web
 |title=Linea ferroviaria FR4a Roma – Albano Laziale 
 |url=http://www.lazio.portale-infrastrutture.it/infrastruttura_scheda.asp?id=202 
 |work=Lazio.portale-infrastrutture website 
 |publisher=Unioncamere Lazio 
 |accessdate=11 November 2012 
 |language=it 
 |url-status=dead 
 |archiveurl=https://web.archive.org/web/20160303234227/http://www.lazio.portale-infrastrutture.it/infrastruttura_scheda.asp?id=202 
 |archivedate=3 March 2016 
}}</ref>
<ref name=lffr4f>{{cite web
 |title=Linea ferroviaria FR4f Roma – Frascati 
 |url=http://www.lazio.portale-infrastrutture.it/infrastruttura_scheda.asp?id=203 
 |work=Lazio.portale-infrastrutture website 
 |publisher=Unioncamere Lazio 
 |accessdate=11 November 2012 
 |language=it 
 |url-status=dead 
 |archiveurl=https://web.archive.org/web/20160404033838/http://lazio.portale-infrastrutture.it/infrastruttura_scheda.asp?id=203 
 |archivedate=4 April 2016 
}}</ref> 
<ref name=lffr4v>{{cite web
 |title=Linea ferroviaria FR4v Roma – Velletri 
 |url=http://www.lazio.portale-infrastrutture.it/infrastruttura_scheda.asp?id=251 
 |work=Lazio.portale-infrastrutture website 
 |publisher=Unioncamere Lazio 
 |accessdate=11 November 2012 
 |language=it 
 |url-status=dead 
 |archiveurl=https://web.archive.org/web/20160303234642/http://www.lazio.portale-infrastrutture.it/infrastruttura_scheda.asp?id=251 
 |archivedate=3 March 2016 
}}</ref>
}}

==External links==
{{commons category|Ferrovie Regionali del Lazio}}
* [https://web.archive.org/web/20131231040624/http://www.atac.roma.it/ ATAC] – official site {{in lang|it}}
* [http://www.atac.roma.it/files/doc.asp?r=4 ATAC map] – [[schematic]] depicting all routes in the Rome railway network

''This article is based upon a translation of the [[:it:FR4 (ferrovia regionale del Lazio)|Italian language version]] as at November 2012.''

{{Urban rail transport in Rome}}

[[Category:Ferrovie regionali del Lazio]]