Siemens has begun delivering 35 additional metro cars ordered by Bangkok Mass Transit (BTSC) in Thailand to lengthen existing trains from three to four cars, in a bid to meet passenger demand, according to Railway Technology.
The first batch of four rail cars is expected to arrive at Laem Chabang Port in Thailand on 20 August 2012.
BTSC will integrate the new cars with the existing three-car units to form the four-car trains that will used on the Sukhumvit Line from On Nut to Baring.
BTS has already deployed the Siemens trains on the line, which was extended by 5.3km from On Nut to Baring in August 2011.
The rail operator is currently extending the line by a further 12.6km from Baring to Samut Prakan; the extension is scheduled to be finished in 2015 and will serve seven more stations.
BTSC ordered the €42m cars from Siemens Mobility in November 2010 for use on the Thai capital's first elevated rapid transit system, originally opened in 1999.
The rapid transit system comprises the Sukhumvit and Silom lines, spanning 28km and serving 25 stations, while each car has four seats and space for 240 standing passengers.
Siemens is also responsible for providing the complete power supply for DC and AC operation; the electrification package includes the power supply systems for train traction and the seven connected stations.
Siemens will deliver the electricity package as a subcontractor to Italian-Thai Development Public Company (ITD).