As of December 2009, these names were dropped again in favour of a combination of letters and colours, to emphasise and clarify the difference between the separate branches, especially of the former East – West line.

At Capelsebrug, Line C branches off the main East-West section to De Terp in Capelle aan den IJssel.

Line D runs from Rotterdam Centraal via Beurs, Slinge, Rhoon, Tussenwater, and Spijkenisse Centrum towards De Akkers.

The line was then closed between here and Laan Van NOI while construction was completed of a new station built on an elevated viaduct adjacent to the railway platforms.

By adding extra stations and operating trains at two-minute interval RET expects to achieve a significant increase in traffic.

In 2013, RET announced that it ordered 16 additional vehicles of SG3 stock to run on the Hoekse Line extension.

There are multiple spring-loaded contact shoes on both sides of the vehicle, which are loaded and unloaded automatically due to the slanted edges of third rail ends.

To reduce the risk of electrocution, the rail consists of a sturdy yellow insulating material, with the live current carried on a thick metal strip on the bottom side.

This also guards against grime (such as from fallen autumn leaves) reducing or preventing electrical contact.

Note that Line B trains switch back to third rail for the final leg of the journey, from the penultimate station De Tochten to Nesselande.

For this reason, trains with a pantograph (series 5200 and 5400) are equipped with turn signals just like any road vehicle.