Skip to content
Press release

PORR Infra to kit out Germany's second-longest road tunnel

Hirschhagen Tunnel on the A44 near Kassel to receive electrical equipment worth approx. EUR 31.5m

PORR Infra creates secure connections with its traffic safety technology.

PORR Infra creates secure connections with its traffic safety technology.


Salzburg/Kassel, 16.01.2019 – The PORR bidding consortium won the tender for the construction project "A44, VKE 12, Tunnel Hirschhagen, Technische Ausstattung" at the turn of the year. PORR Infra GmbH will be responsible for realising the contract. The tunnel is set to open to traffic in spring 2022.

"This sophisticated traffic infrastructure project is a milestone for PORR in Germany. Thanks to the expansion of our product portfolio in 2018, the PORR Group – represented by PORR Infra GmbH – is a firm fixture on the German market in the field of electrical equipment for road tunnels," said Gerhard Jelinek, Managing Director of PORR Infra.

In the course of the new construction of the 5.2-km-long section of the A44, the two-tube Hirschhagen tunnel will play a leading role in traffic technology. The lot has a length of around 4.2 km (North tube 4,147 m, South tunnel 4,204 m). Upon completion, Hirschhagen Tunnel will edge out Neuhof Tunnel in East Hesse (1,610 m; A66) to become the longest motorway tunnel in the State of Hesse. This will also make it Germany's second-longest motorway tunnel after Rennsteig Tunnel in Thuringia (7,916 m; A71). The project will start in February 2019.

Highly complex technical installation in public infrastructure sector

Under the contract, the bidding consortium will handle the supply, installation and start-up of the entire electrical equipment, fittings and components needed to open the tunnel to public traffic. Included here, for example, are systems from the power supply to the steel construction, fire detection and prevention, through to the tunnel's ventilation and lighting, as well as traffic control including intelligent monitoring and transmitting all control signals via and to the tunnel's operations centre.

In light of the importance of safety considerations, the two tunnel tubes are linked by seven crossways accessible by vehicles and eight walkways. The fittings for these crossways are also part of the electrical equipment contract. Forecasts suggest that the average traffic impact on the whole section VKE 12 will be around 37,800 vehicles per day.

Facts and figures at a glance

Project nameA44, VKE 12, Tunnel Hirschhagen
ClientHessen Mobil Straßen- und Verkehrsmanagement
ContractorBidding consortium consisting of PORR Infra GmbH, PORR Bau GmbH and PORR Deutschland GmbH (in the future: PORR GmbH & Co. KGaA)
Scope of servicesElectrical equipment and fittings
CompletionSpring 2022
Contract volumearound EUR 31.5m net

Here you can find all of the materials related to this press release. Maybe you still have additional questions? Simply contact us. We look forward to providing you with answers.