in Untermenzing (S2 West). Some already existing stations on the outer routes could also be made wheelchair-accessible in the financial framework of the project. On 21 November 2005, the section of the airport line S 8 within Unterföhring was moved underground, this was at the request of the town. On 13 December 2009, a new stop "Hirschgarten" was inaugurated on the S-Bahn trunk line between Laim and Donnersbergerbrücke. On 14 September 2013 a new Freiham stop was opened on line S8 close to the one that had been closed decades before, which is to connect the new residential area Freiham. It is located one kilometer east of the 1975 decommissioned station Freiham. Construction had begun on 12 June 2012. On 15 December 2013, the S 27 from the main station to Deisenhofen was discontinued, the trips are taken by the half-hourly Meridian trains of the Bayerische Regiobahn, which are extended in the rush hour via Holzkirchen and the Mangfalltalbahn to Rosenheim. In addition, the terminus of the S 20 line was relocated from Deisenhofen to Höllriegelskreuth on the Isartalbahn. The railway line Munich-Holzkirchen is no longer served by S-Bahn trains between Solln and Deisenhofen. In 2014, the Dachau–Altomünster railway line, which had previously been used by line A, was electrified, which had been the only unelectrified stretch of the S-Bahn. Furthermore, a two-track meeting section between Bachern and Schwabhausen and an additional crossing station in Erdweg were built. The planning approval process was completed in January 2013. From 28 April to 13 December 2014, the line A line between Dachau and Altomünster was suspended for electrification, and Class 428 railcars were replaced by buses. After completion of the conversion work, electrical operation began on 14 December 2014. During rush hour, trains now operate on a 30-minute headway. Otherwise, service remains hourly. The route is operated as a wing section of the S 2. The last cost estimate was 47 million euros. Construction was originally scheduled to start in 2012 and completion was scheduled for 2013. Further dates: 15 June 1966 – Construction of the core route tunnel begins in Arnulfstraße. 28 April 1972 – first test runs on the tunnel route (Hauptbahnhof-Marienplatz-Ostbahnhof). 28 May 1972 – regular service with 360 route km begins. Rolling stock Class 420 Since the opening of the S-Bahn network from 1972 to 2004, vehicles of the DB Class 420 have been used in the Munich