Trains run under the ground in a city. 

Fast trains run in a city called Rotterdam. 


The Rotterdam Metro is a fast train system. It serves the city of Rotterdam in the Netherlands. 

Today, the system uses letters and colors. This helps riders know which line to take. In 2015, about 175,000 people used Lines A, B, and C every day. Lines D and E had 145,000 daily riders.
Trains need power to move. Most of the tracks use a third rail. This is a special rail that gives power to the train. It is made of a thick metal strip. The rail sits on yellow material to keep people safe. 
Some lines use overhead wires instead. These wires give power to a part on top of the train. We call this part a pantograph. On some lines, the trains switch between the rail and the wires while they move. This helps the trains reach different parts of the city. 
The Rotterdam Metro is a fast train system in the Netherlands. It helps many people travel through Rotterdam and nearby towns. 

Trains get their power in a few different ways. Most of the tracks use a third rail to provide electricity. This rail has a thick metal strip on the bottom for power. The rail sits on yellow insulating material to keep people safe. 

The history of the metro began many years ago. The first line was the Noord–Zuidlijn, which opened in 1968. It ran from Centraal Station to Zuidplein and went through a tunnel under the Nieuwe Maas river. At that time, it was one of the shortest metro lines in the world. A second line, the Oost–Westlijn, opened in 1982. In the late 1990s, the lines were named after famous citizens named Erasmus and Caland. 
Today, the metro uses letters and colors to help riders. This makes it easier to see the different branches of the lines. 

Learning about the metro helps us see how cities work. It shows how engineers use different tools like third rails and overhead wires to move trains. 
The Rotterdam Metro is a rapid transit system serving Rotterdam and its surrounding municipalities in the Netherlands. Operated by RET, this network provides essential transportation for hundreds of thousands of commuters. In 2015, daily ridership reached approximately 175,000 people on Lines A, B, and C. Meanwhile, Lines D and E carried about 145,000 daily riders. This system acts as a vital artery for the region, connecting different cities and neighborhoods through a complex web of tracks and tunnels. 
Most of the metro operates using a third rail to provide electrical power. This system uses 750 volts DC power to move the trains. The third rail is made of a sturdy yellow insulating material to ensure safety. A thick metal strip on the bottom of the rail carries the electrical current. To collect this power, trains use multiple spring-loaded contact shoes on both sides of the vehicle. These shoes are designed with slanted edges so they can be loaded and unloaded automatically. This design allows the rail to be placed on either side of the track, which is necessary near station platforms and points. 
However, not all parts of the network use a third rail. Some sections use overhead wires to provide electricity. On these parts of the line, trains use a device called a pantograph to touch the wires. For example, Lines A and B use overhead wires in certain areas. On these lines, trains may raise or lower their pantographs while they are moving. In contrast, Line E uses overhead wires while the train is stationary at Melanchtonweg station. Some trains even switch between the third rail and overhead wires during a single journey. 
The history of the system began with the opening of the Noord–Zuidlijn in 1968. This first line ran from Centraal Station to Zuidplein and crossed the Nieuwe Maas river through a tunnel. At its launch, it was one of the shortest metro lines in the world. A second line, the Oost–Westlijn, opened in 1982 to connect Capelsebrug and Coolhaven. In the late 1990s, the lines were named after historic citizens, Desiderius Erasmus and Pieter Caland. By December 2009, these names were replaced by letters and colors to help passengers distinguish between different branches. 
The current network is organized into several distinct lines. Lines A and B serve the northeast of Rotterdam, branching toward Binnenhof and Nesselande. Some sections of these lines use level crossings and overhead wires, which locals sometimes call sneltram or light rail. Line C branches off from the main East-West section at Capelsebrug and travels to De Terp. Line D runs from Rotterdam Centraal through various stations like Beurs and Slinge to terminate at De Akkers in Spijkenisse. 
Line E is a unique part of the network known as RandstadRail. It was created in 2006 by converting the former Hofpleinlijn railway into a rapid transit line. This line connects to the Hague tram network and shares tracks with light rail vehicles. A significant development occurred in 2010 when a new tunnel opened to connect Rotterdam Centraal to the existing tracks. By December 2011, a project was completed to connect Line D and Line E at Rotterdam Centraal. This allowed for more seamless travel between the two lines. 
The rolling stock used in the system includes various series of vehicles. Many of the modern trains, such as the 5300, 5400, 5500, 5600, and 5700 series, are Bombardier Flexity Swifts. These vehicles are designed to handle the specific power needs of the lines. For instance, the 5500 series was built specifically for the RandstadRail Line E. RET has also ordered newer HSG3 vehicles to increase capacity on certain branches. These technological updates ensure the system can handle high volumes of passengers efficiently. 
Looking toward the future, RET has ambitious plans to expand and improve the system. They intend to build a connecting line from Kralingse Zoom to the Feijenoord City housing area. This expansion would reach Zuidplein, Charlois, and Rotterdam Central. There are also plans to convert heavy-rail tracks between Rotterdam Central and Dordrecht into metro operations. By adding more stations and increasing train frequency to two-minute intervals, RET expects much higher traffic. They even aim to automate the metro to achieve 90-second headways between trains.
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