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Bangalore Elevated Tollway Limited (BETL)

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Bangalore Elevated Tollway Limited (BETL)
Bangalore Elevated Tollway Limited (BETL)
Project Brief
Bangalore Elevated Tollway Limited (BETL) is the Special Purpose Vehicle (SPV) created to undertake the Construction, operation, maintenance of the elevated highway from Silk board junction (Benguluru) to Electronic city (Outer Benguluru) and the operation and maintenance the atgrade section from Silk Board Junction to Attibele junction (near Hosur).
The project entails Improvements at ground level including construction of underpass and construction of elevated highway in Electronic City section and HTMS in Km 8.765 and Km 33.130 of NH-7. The elevated section runs close to 10 km and is intended to relieve the intensity of traffic plying on the stretch. This was one of the longest elevated corridors in India.
Project Credits

Client : NHAI

  • Project Type: Express Way
  • Length of Elevated Road: 11.5 Km Length
  • Location: Bangalore
  • Consultant: Renardet S.A.
  • Contractor: SOMA / MAYTAS / NCC
  • Lighting: Wipro Ltd
Lighting for Elevated Highway

The Elevated Highway consists of different areas to be illuminated as per NHAI requirements. The areas to be illuminated are-

  • Approach Road lighting
  • Approach Ramp lighting
  • Truck / Bus Lay bay lighting
  • Lighting for Various descending Ramps at the end of elevated road
  • Main elevated road lighting
  • Under deck lighting of elevated roads
  • Underpass Lighting
  • Service Road Lighting
Lighting Requirements as per NHAI Guidelines:
Particulars Locations
Elevated Highway Recessed Lights in Segments for GL Road Service Road at GL Underpasses (6 nos) (*)
For Bridge Deck For GL Carriageways
Height of Luminaires 9.0 M 3.0 M (above Elevated Deck) Variable Variable ---
Spacing of Poles 34 m c/c on each side 34 m c/c on each side 34 m c/c on each side 34 m --
Wattage of Luminaires 250 W HPSV 250 W HPSV 250 W HPSV 250 W HPSV 2 x 36 W CFL
Average Illuminance 40 Lux 30 Lux 20 Lux 70 Lux
Minimum Illuminance 18 Lux 19 Lux 8 Lux ---
Uniformity > 40 % 19 Lux > 40 % > 60 %


Design Results Achieved:
Particulars For Bridge Deck For GL Carriage Way and GL Road with Bottom of Bridge Deck (from GL) at For Service Road at GL with Bottom of Bridge Deck (from GL) at
6-15 M 6-10 M 10-15 M
Luminaire Cat. No. WST 71250 WHT 61250 WST 71250 WST 71250
Lamp Wattage & Type 250 W HPSV-T 250 W HPSV 250 W HPSV-T
Mounting Arrangement Opposite Pole Mounting on 9 M High Pole. Under Bridge Deck (Opposite) Opposite Pole Mounting at the Top of Bridge Deck on 9 M High Pole used for Illumination of Bridge Deck @ 3 Mtr Height
Length of Pole Bracket 1.5 Mtrs Not Applicable 1.5 Mtrs 1.5 Mtrs
Angle of Tilt 15 Degrees 15 Degrees 25 Degrees 25 Degrees
IP Protection for Luminaire IP 66 IP 66 IP 66
Type of Installation Pole Mounted Surface mounted on Pedestal Pole Mounted
Spacing 34 M c/c on each side 34 M c/c on each side for 10M and above. 22M c/c on each side for 6-10M 34 M c/c on each side
Average Illuminance 43 Lux 40 Lux 28 - 29 Lux 29 Lux
Minimum Illuminance 23 Lux 18 Lux 14 – 21 Lux 22 Lux
Uniformity of Installation 0.537 0.452 0.50 – 0.71 0.743
Proposed Solution
  • Wipro proposed solution of High performance Street Lights and Under Carriage Luminaire specially developed for this project to achieve required design results.
Our proposed products
Proposed

Key Products
To address BIAL’s needs holistically, we picked some of the most innovative lighting solutions that we had designed.
UNO Street Light
150W HPSV-T 250W HPSV-T
WHT61 (Under deck Luminaire)
150W HPSV-T 250W HPSV-T
WFZ66250
2 x 250W HPSV-T
Luminaire Used UNO Street Light

We have proposed Uno range of Street Light luminaires to Main Carriage Way and Service Roads:

  • Die cast aluminium compact and aesthetically designed housing with electrochemically brightened high purity anodised aluminium pot optics reflector
  • IP 66 optically sealed lamp compartment with flat toughened glass and silicon sealent
  • Top maintainable hingable top cover.
  • Anti corrosive stainless steel clamps with gasket to seal lamp holder cap and facilitate lamp replacement
  • Special air breathing filter in lamp holder compartment for better ventilation and for removal of excessive heat from lamp compartment
  • Provision of adjustable lamp position to control distribution of light both on street side and kerb side.
  • Removable control gear for ease of maintenance
  • Heavy duty, low loss inductive copper wound ballast
Luminaire Used Under Deck Luminaire WHT61250

We have proposed specially developed and designed under deck luminaires for Main Carriage Way below elevated highway:

  • Die cast aluminium compact and aesthetically designed end caps and extruded aluminium housing with electrochemically brightened high purity anodised aluminium pot optics reflector
  • IP 66 optically sealed lamp compartment with flat toughened glass and silicon sealent
  • Top maintainable hingable top cover.
  • Anti corrosive stainless steel clamps with gasket to seal lamp holder cap and facilitate lamp replacement
  • Provision of adjustable lamp position to control distribution of light both on street side and kerb side.
  • Removable control gear for ease of maintenance
  • Heavy duty, low loss inductive copper wound ballast
Results Achieved
  • Lux levels achieved as per NHAI Standards for the complete areas
  • Lighting Power Density achieved using next High Lumen Output HPSV-T Plus Lamp
  • Specially developed under deck luminaire with vibration dampeners as per NHAI requirements
Benefits to Client:
  • Proposed solution of Wipro helped getting good lighting for the elevated tollway
  • More footfall because of well illuminated elevated, under deck roads
  • Energy saving through use of next generation HPSV-T Plus Lamps

BETL is one of the first major and prestigious NHAI projects done by Wipro. Since then we have added various prestigious NHAI projects like NH3-Dhule stretch, NH-8 Kishangarh Beewar stretch to our portfolio making it an established player in Highway lighting.

With the addition of latest generation high performance street lighting products, Wipro continue to build its credentials.