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.