Happy February everyone!
For those of you who reside in Paris, I have some wonderful news to report! The planned extension of the commuter rail line E has been approved, making way for a possible start of construction date in 2014!
Note: I’ve obtained some the information used for this blog post from the International Railway Journal article, Paris RER Line E extension approved. I’ve provided a formal citation at the end of this post using the MLA format (via Citation Machine). The remaining parts of this post uses info from Symbioz, which is in French. You can use a translating service to view Symbioz in your respective language.
For those of you who may be unfamiliar with Parisian transports, Line E is part of the RER Commuter Rail network in Paris, France. RER stands for Réseau Express Régional, or Regional Express Rail. Much of the system was built in segments during the 1970s, 80s, and 90s, with some segments utilizing former passenger rail lines that were established long ago (such as the Ligne de Sceaux, which is a part of the RER Line B today). Line E opened to passengers in 1999 and is the fifth line to be constructed in the RER system. The line was originally known as project EOLE (which meant Est Ouest Liaison Express) during its planning and construction .
The current route connects Gare St. Lazare and Gare du Nord (via station Magenta, where connections to RER Lines B & D are available) to the western suburbs of Noisy-le-Sec, Chelles-Gournay, Val de Fontenay (where it connects to RER Line A), Villier-sur-Marne, and Tournan (among many others) . The planned extension would bring the RER E to Mantes-la-Jolie via the La Defense district, partially via the existing infrastructure of SNCF (which is the French National Railway) and one of the branches of the RER A. The other segment of the extension will consist of a new 8km tunnel that would be dug between Gare St. Lazare and La Defense, paralleling it with Line A near station Auber. Once the extension is complete, it is expected that travel time between La Defense and the western suburbs will be reduced by roughly 15 minutes. The extension will also relieve congestion on parts of Lines A & B .
With final approval granted for the extension of Line E (which is known as the Declaration of Public Utility), construction is set to begin sometime in 2014, with completion estimated to be sometime in 2020 .
 “Le RER E.” Symbioz. Symbioz Corp, 27 Apr 2010. Web. 3 Feb 2013. <http://www.symbioz.net/index.php?id=74>.
 “La ligne de Sceaux.” Symbioz. Symbioz Corp, 23 Dec 2007. Web. 3 Feb 2013. <http://www.symbioz.net/index.php?id=70>.
 Briginshaw, David. “Paris RER Line E extension approved.”International Railway Journal. 01 Feb 2013: n. page. Web. 3 Feb. 2013. <http://www.railjournal.com/index.php/commuter-rail/paris-rer-line-e-railway-extension-approved.html?channel=641>.