Tunnel Lighting

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About Tunnel Lighting

Tunnel Lighting is the most technical and fundamentally broad one of all lighting applications. Beam directions, lux levels, luminance, and illuminance levels, thresholds, etc. become exceptionally important when it comes to tunnels. Due to the fact that optimum tunnel lighting is directly related to driver’s safety, from project to product design, many criteria have to be handled carefully to light up tunnels in the most adequate way.

As HEPER, we have a proud history over decades of working in tunnel lighting projects successfully all around the world. In recent years, we have worked constantly to carry our success in conventional light source tunnel products to the latest technology LEDs.

Referance Projects

North Marmara Highway Tunnels/ TURKEY

The Northern Marmara Highway tunnels are the widest tunnels in the world with 4-lanes. The North Marmara Highway, which connects the Asian and European continents, is a high standard, safe, quality and uninterrupted transportation investment. 3 tunnels on the European side and 5 tunnels on the Anatolian side, the highway eases the transportation of the region and makes the journeys more comfortable.

Gran-Jaren Tunnels/ NORWAY

In 2016, the Norwegian Public Roads Administration completed a new Rv4 from Roa to Lygna on Hadeland. When a new road is taken into use, the traffic capacity will be significantly increased, and the new Grans tunnel will relieve Gran center of through traffic. The work includes the construction of a 9.3 km new four-lane road with central sections. This includes the Grans tunnel of approx. 1.7 km. Furthermore, 10 km of local roads and 1.4 km of pedestrian and bicycle paths.

Sabuncubeli Tunnel/ TURKEY

Located on Sipylus Mountain in  Aegean Region, Sabuncubeli Tunnel consists of 2 lanes of double tube tunnel ( each in the length of 4km), 1,5 km length of road, and 1 crossroad. Providing a safer drive, Sabuncubeli Tunnel shortens the travel time between Manisa and Izmir from 45 minutes to 15 minutes and contributes to the elimination of traffic congestion in the wintertime.

Al Sharqiya (Bıd Bıd Sur) Tunnels/ OMAN

Running between BidBid and Al Kamil W’al Wafi, Al Sharqiya is Oman’s first road tunnel project. Having three lanes in each direction the tunnels are designed in accordance with the highest international standards and specifications.  With a total length of 2040 m, Al Sharqiyya Tunnels are adequately illuminated to provide all-day-long traffic safety.

Check out for more tunnel projects: https://heperlighting.com/projects/

Optimized Lighting Distribution For Tunnels

Our state of the art products offer the following benefits for you:

– Optimized light distribution for tunnels and underpasses
– Different type of control options to meet different illumination needs in
different zones
– Designed in house to resist tough conditions
– Modular construction makes them easy to install and maintain
– Smooth project handling from project development and lighting calculations to producing and delivering the luminaire while maintaining
competitive advantage

Check out for tunnel products: https://heperlighting.com/tunnel-lighting-tl1/

Tunnel Lighting Products by HEPER

State of the art tunnel lighting luminaire

With dozens of optical distribution options, there is no tunnel out there that our GOLEDO cannot thrive in.

Check out for more: https://heperlighting.com/goledo-lt-goledo/

TUNNEL LIGHTING PRINCIPLES

ZONE TYPES

1 - Access zone

The part of the open road in front of the tunnel portal in
the approach direction, covering the distance over which an approaching driver is able to see the tunnel entrance. The access zone begins at the stopping distance before of
the entrance portal and it ends at the tunnel entrance
portal.

3 - Transition zone

The part of the tunnel starts from just after the threshold zone and ends at the beginning of interior zone. The lighting level in the transition zone is decreasing from the level at the end of the threshold zone to the level of the interior zone. Interior zone: the part of the tunnel after the transition zone till to the beginning of the exit zone.

4 - Interior zone

2 - Threshold zone

The first part of the tunnel, just after the entrance portal. The threshold zone starts either at the beginning of the tunnel or at the beginning of the daylight sunscreens when occurring. The length of the threshold zone is at least equal to the stopping distance.

The part of the tunnel after the transition zone till to the beginning of the exit zone.

5 - Exit zone

The exit zone begins at the end of the interior zone, ends at the exit portal of the tunnel.

DESIGN CRITERIA

Tunnel

Tunnel is the structure over a roadway that restricts the normal daytime natural illumination of a roadway section such that the driver’s visual sensation is diminished. In order to classify changing lighting requirements along with the tunnel length, a tunnel is evaluated in the form of sub interior zones: the access zone, the threshold zone,  the transition zone, the interior zone, the exit zone, and the parting zone. 

Traffic Flow

Design Speed

The number of vehicles passing a specific point in a stated time in a stated direction(s). In tunnel design, peak hour traffic, vehicle per hour per lane, will be used

The design speed is the speed at which the tunnel is laid out. It is generally accepted that this speed is the maximum speed allowed on the access roads to the tunnel.

Stopping Distance

Reference Point

Stopping distance is the distance necessary to stop the vehicle from moving at the speed in question in total safety. It comprises the distance covered during the reaction time and during the braking time.

The reference point is in principle the point located in the
center of the approaching lanes, at a height of 1,5 m and at a distance from the entrance of the tunnel equal to the stopping distance (SD) at the design speed.

Tunnel Lighting Distribution Types


Symmetric lighting

The lighting where the light equally falls on the objects in direction with and against the traffic. Symmetric lighting is characterized by using luminaries that show a luminous intensity distribution that is symmetric in relation to the plane normal to the direction of the traffic. 

Counter-beam lighting

The lighting where the light equally falls on the objects from an opposite direction to the traffic. Counter-beam lighting is characterized by using luminaries that show a luminous intensity distribution that is asymmetric in relation to the plane normal to the direction of the traffic, where the maximum luminous intensity is aimed against the direction of the traffic. The term refers only to the direction of normal travel. 

Pro-beam lighting

The lighting where the light equally falls on the objects in the same direction to the traffic. Pro-beam lighting is characterized by using luminaries that show a luminous intensity distribution that is asymmetric in relation to the where the maximum luminous intensity is aimed in the same direction of the traffic. The term refers only to the direction of normal travel. 

To learn more information about HEPER please check our website: To learn more information about HEPER: www.heperlighting.com

For more information please check out our tunnel lighting brochure