The first dynamic tests on Amsterdam's 9.8km North-South Line were made on April 21 using an M4 train from the Ring Line propelled by a shunting tractor. The tests took place at the northern end of the line between Noord and Noorderpark stations. The objective of these initial trials is to test the functioning of the CBTC system supplied by Alstom. Further testing will be undertaken later in the year with an M5 train, by which time the third rail power supply will have been energised. Construction of the North-South Line started in 2002, but the project has suffered a series of setbacks which have delayed completion until October 2017.
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