Metro Line 2 Warsaw: optimal noise & vibration control

A new milestone for the largest metro project in Eastern Europe! The western section of Metro Line 2 in Warsaw has been taken into operation, including two new stations Bemowo and Ulrychów.

On 30 June 2022, the official opening took place at the Bemowo station, by Mayor of Warsaw Rafał Trzaskowski and by EU Commissioner Elisa Ferreira. edilon)(sedra are proud to have contributed to this project, supporting the contractor Gülermak. edilon)(sedra supplied a state-of-the-art track system solution, based on Corkelast® EBS blocks and Trackelast® mats, offering optimal noise & vibration control especially for the critical city areas.

For project Line 2, more than 30 km of edilon)(sedra Corkelast® EBS track has been installed, including EBS bearers for turnouts, crossroads and double track connections and 520 m of Corkelast® ERS (Embedded Rail System) track. The opening of the 3 new stations in the eastern direction of Line 2 is expected this year. We will keep you informed!




Green tracks for Mannheim’s longest tram line

The Final Spurt on Mannheim’s longest tram line…Now just to water the track to make the grass grow!

It took round about 80 days of construction time to renew the track system of the light rail line 1 which was originally installed in 1979 between Casterfeld Straße and Neckarauer Straße. The rnv (Rhein-Neckar-Verkehr GmbH) deliberately opted for a modern, currently very much in demand type of green track. The visual enhancement of the areas next to the grey asphalt car lanes, as well as the sound dampening and the improved microclimate were at the forefront of the decision for the green track.

Up to the end of the Autumn in 2021 edilon)(sedra has supplied mainly filler blocks type ‘Mannheim light’ for rail type 49E1, customized to individual requirements e.g. different heights for different track sections or applications, for a total track length of 3800 m.

The filler blocks are part of the well-known edilon)(sedra SDS System (Sound Damping System), which is made of recycled material and 100% recyclable. All in all, a durable system for urban grass track applications!

Advantages of edilon)(sedra green tracks:

  • Cooling effect
  • Noise reduction
  • Absorption of fine dust
  • Reduction of the soil sealing intensity
  • Biodiverse and incredibly good looking


Source: rnv GmbH
from left: Martin in der Beek (Managing Director rnv), Christian Specht (First Mayor and ÖPNV-Head of Department Mannheim), Elke Zimmer (MdL), Marcus Geithe (Managing Director MV Verkehr GmbH)



Corkelast® EBS installation on a steel-concrete railway bridge in Poland

Constructionheight, constructionspeed and electrical insulation are important challenges when it comes to the design and installation of rail tracks for bridges. Ballastless track systems are a frequently chosen solution when it comes to these type of challenges.

Take our Corkelast® Embedded Block System EBS, for example, which was recently installed on this steel-concrete PKP railway bridge between Chlastawa and Dąbrówka Zbąska in Poland.

As you can see, the EBS blocks are efficiently incorporated in the bridge superstructure, contributing to an optimal clearance for another railway line under passing the bridge.

The concrete blocks are elastically embedded with Corkelast® into prefabricated, coated steel trays that are cast permanently into the slab track. This bonding offers optimum electrical isolation and forms a seal to prevent the ingress of liquids and detritus that may cause problems for ordinary ‘booted’ block systems.

Application of prefabricated track elements contributed to a short construction time span. Baseplates were assembled on the construction site to further speed up construction.

In this specific case we have designed and supplied special EBS B03GR block types to allow the installation of a derailment protection rail (49E1 guide rail) next to the riding 60E1 rail.




edilon)(sedra, technical partner for the mega rail project Toluca, Mexico

Observe the installation of our DFS rail fastening system on several viaducts, standing over 35 meters above the ground. A special technical challenge that really demonstrates the rail engineering competence of edilon)(sedra!

Lead engineers from SENER selected the edilon)(sedra DFS-FF ASB system for one of the largest railway projects in Mexico: the new commuter railway track between Toluca and Mexico City. A track designed for speeds of up to 160 km/hr and axle loads of 22.5T.

edilon)(sedra’s competence here is to support the integration of the rail fastenings for different civil engineering structures, which resulted in a cooperation that developed into a strong project partnership.

The Toluca project is a major development in the greater Mexico City area, aiming to reduce traffic congestion, CO2 emissions, and improve safety and mobility.

We are proud to support this mega project with our rail fastening solutions. Would you like the edilon)(sedra engineers to support your challenge? Don’t hesitate to contact us for a free consultation!

These 2 videos give you some background information about the project:






Rail replacement on the Demka railway bridge in Utrecht, The Netherlands

After the rail replacement on the steel Demka railway bridge last year, we replaced the rails on the adjacent concrete-steel “Second Demka” railway bridge in the first week of July of this year.

The project in short:

  • Lifetime extension of the rail bridge construction
  • Rail replacement of 2 x 255 m track in a short period of time (9 days possession), for a minimal disturbance to train passengers
  • In close cooperation with main contractor VolkerRail
  • Applied rail fastening system: edilon)(sedra Corkelast® ERS (Embedded Rail System)
  • ERS contributes to an extended rail and bridge life due to: continuous rail support, optimized vibration mitigation, optimal electrical insulation

Respect to the professionals who work day and night to get this job done!





Renovation of three heavy duty railway bridges in Hungary

In the Hungarian city of Budapest, contractors are working hard on the renovation of three Southern Connection Railway bridges. This renovation project, which is part of the cities overarching South Circle Train project, can justifiably be called a technical masterpiece.

edilon)(sedra’s Corkelast® ERS will be installed as the track system on all three bridges, 1.498 m of track in total. Duna Aszfalt Kft. will install the tracks, ensuring no disturbance to ship and railway traffic. The installation of the first track is expected to take place in Spring 2021.

The bridges, which are situated on the line between the Eastern Railway Station and Hegyeshalom, are three of the busiest railway connections, crossing the river Danube. The aim of the South Circle Train project is to provide a modern transport alternative in southern Budapest for the residents of the conurbation.

Installation of the new steel bridge elements

Installation of the new steel bridge elements


Project update of the Jokeri line, Finland

In last year’s newsletter we announced the start of project Jokeri line in Finland. This line is built between Itäkeskus in Helsinki and Keilaniemi in Espoo and is expected to start operation in 2023. After thorough preparation works with all the project partners, product deliveries and installation works are currently in full swing.

We supply different types of our SDS rail encapsulation system for almost 30 km of light rail track with the ultimate goal of delivering a reliable track, with high capacity and passenger comfort. Additionally, together with the Raide Jokeri project team we are working on a series of Special Structures.

These mainly concern bridge constructions with building height restrictions, for which our Corkelast® ERS system is ideally suited. Below, the photos show the installation works for two of these Special Structures: Sello Deck and Maasilta.

Veera Koskela, Project Manager of project partner NRCGroup about Sello Deck: “We have chosen the twin-block sleeper system as our main superstructure at Jokeri Light Rail, but for the Sello Deck structure that would have caused large scale changes on the façade of the neighbouring shopping mall among other challenges. The design work together with edilon)(sedra Application Engineering has fulfilled our expectations both in technical expertise and pro-active co-operation, which is a great thing as such, but essential in an Alliance project with complex challenges.”

Sello Deck: ERS bridge construction on top of a parking garage
(ERS in steel channels designed by our application engineering team)


Maasilta: ERS (on background with tight R < 50 m curve) and SDS type Mannheim (on foreground) with a transition zone in between

Finch West LRT

Finch West LRT: brand new transit access to northwest Toronto

edilon)(sedra has been selected by Colas Rail Canada, a subcontractor of the Mosaic Transit Group consortium to supply the Corkelast® ERS to embed rails for the mainline track of the new Metrolinx Finch West LRT Line in Toronto, Canada.

The edilon)(sedra Corkelast®  ERS (Embedded Rail System) will be installed in all sections of the track including stations, stops and bridges. Track contractor Colas Rail will carry out the track installation works.

The Finch West LRT Line, which is owned by Metrolinx will be operated by Toronto Transit Commission and maintained by Mosaic Transit Group. When in service, it will provide brand new transit access to the northwest area of Toronto, with connections to the current TTC subway Line 1, as well as York and Peel Regions transit services.

The new line will have 18 stops between Humber College and the Finch West subway station and is planned to be operational in 2023. We will keep you informed!

Finch West LRT

Visual of a future Finch West Light Rail station portal. Source: Mosaic Transit Group

Red Line light rail project, Tel Aviv

Playing a role in different track related project disciplines, from the technical advice and track design to the supply and installation of track systems. This is when we are at our best! Our ultimate goal: the delivery of sustainable track systems.

Take for example the current Red Line light rail project in Tel Aviv, Israel. Initially, edilon)(sedra Iberica advised the infrastructure consultants Ineco (Spain) and Chinese contractors CRTG-EEB Red Line Systems, L.P. with track and compliance related aspects for the tender specifications. This cooperation led to the implementation of a series of interesting project solutions.

To ensure perfect electrical insulation of the track at the Kiryat Aryeh light rail depot, the Corkelast® Embedded Rail System was selected and installed, to meet the demanding requirements of the tender specification. After this positive experience, a sustainable watertight rail joint solution to seal off the fastening of the Red Line track was provided. Also, environmental friendly Jointelast STP was provided as durable sealant of the floating slab track joints. This sealant can handle movements of up to 2 mm.

To improve the electrical isolation properties of the standard rail fastening, the rail coating solution Editack N was offered for 24 km of light rail track. All in compliance with strict requirements of the local authorities on electrical insulation. Last but not least, our high-performance Corkelast® ERS was selected as part of the rail track construction for blast protective tunnel doors. This is what we’re all about: playing a versatile role as solution providers in technically challenging rail track projects!

The Red Line will connect two cities of the Tel Aviv Metropolitan Area: Petah Tikva and Bat Yam. The line will be 24 km long and include 33 stops. The city authorities plan to extend the network with three new lines. The Red Line project was awarded in December 2006 to the Metropolitan Transportation Solution (MTS). The operational date is planned for the end of 2021.






Corkelast® ERS on new Botlek bridge

The new Botlek lift bridge over the Maas in the port of Rotterdam sets standards! It is the largest lifting mass in the world and offers the fastest lift/lower cycle. The bridge should have a lifespan of 100 years and must withstand 900.000 lifting operations without damage.

The new Botlek Bridge is a combined rail and road bridge that replaces the old Botlek Bridge, as part of a major renovation of the A15 motorway in the Netherlands.

This bridge is really a ‘steel chunk of superlatives’: Its two movable superstructures each have a span of 92 m and are around 50 m wide. Each of these monster parts weighs 4.850 t. Together they could practically outweigh the Eiffel Tower!

Such an impressive bridge deserves an impressive track system. We are proud to be involved in this project by providing technical advice, the track design, components and the installation of the double track. Our Corkelast® ERS Embedded Rail System was installed to attain the highest track availability.

The railway bridge is planned to be operational in Spring 2021. The construction consortium A-Lanes consists of John Laing, Strabag, Ballast Nedam and Strukton.

You may also be interested in: (free PDF handbook ERS on Bridges) (our Bridge Competence Centre)