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Fahad & Tahalia Roads Underpass LED Lighting

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A design proposal with the objective of 1) providing sufficient Lighting to the Dual Carriageway under the King Fahad & Tahalia Roads Intersection during Daytime, Night Time and Emergency scenarios and 2) providing excellent wall grazing effect on the writing on the walls of the underpass.

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Fahad & Tahalia Roads Underpass LED Lighting

  1. 1. November 01, 2013 _Sector Confidential1 King Fahad & Tahaliya Roads Intersection Underpass LED Lighting Michael T. Santiago|REE.AILP.MIES. Lighting Applications Design Supervisor Philips – Saudi Lighting Company
  2. 2. November 01, 2013 _Sector Confidential2 King Fahad & Tahaliya Roads Intersection Underpass LED Lighting OBJECTIVE OF THE LIGTING CALCULATION 1) Provide Sufficient Lighting to Dual Roadway during Daytime, Nighttime and Emergency 2) Provide excellent wall grazing effect on the writing on the wall
  3. 3. November 01, 2013 _Sector Confidential3 King Fahad & Tahaliya Roads Intersection Underpass LED Lighting PLAN OF ROAD 1) Speed of Road 2) Daily Traffic: Heavy (w/o provision for pedestrians and cyclists) 3) Dual Carriageway with 3-lanes per direction
  4. 4. November 01, 2013 _Sector Confidential4 King Fahad & Tahaliya Roads Intersection Underpass LED Lighting CONSIDERATION IN CALCULATION 1) Since the covered part of the Tunnel is about 121m long, we can consider it to be a SHORT TUNNEL or an UNDERPASS. 2) As soon as Luminance on Threshold (LTH)is known, we shall target 50% of it. 3) Given is the Allowed Speed Limit which is 100 km/h 4) The formula to determine LTH is the L20 Method: LTH = k x L20 THRESHOLD LUMINANCE REFERENCE: CIE 88:2004, 2nd edition - GUIDE FOR THE LIGHTING OF ROAD TUNNELS AND UNDERPASSES
  5. 5. November 01, 2013 _Sector Confidential5 King Fahad & Tahaliya Roads Intersection Underpass LED Lighting CONSIDERATION IN CALCULATION L20 = LC + LR + LE L20 = 8 + 3 + 8 kcd/m2 L20 = 19,000 cd/m2
  6. 6. November 01, 2013 _Sector Confidential6 King Fahad & Tahaliya Roads Intersection Underpass LED Lighting CONSIDERATION IN CALCULATION L20 = 19,000 cd/m2 L20 = 19,000 cd/m2 x 3% L20 = 570 cd/m2 LTH = k x L20 LTH = 0.08 x 570 cd/m2 LTH = 45.6 cd/m2 FOR SHORT TUNNELS: 45.6 cd/m2 x 50% LTH = 22.8 cd/m2 Speed (km/h) k 60 0.05 80 0.06 100 0.08 120 0.10 Table A.1.3 Ratio, k, for various speeds
  7. 7. November 01, 2013 _Sector Confidential7 King Fahad & Tahaliya Roads Intersection Underpass LED Lighting TARGET VALUES: UNDERPASS LAVE EAVE UO UL Emin Day Time >22.8 cd/m2 >500 lux >0.40 >0.60 NA Night Time >4 cd/m2 NA >0.40 >0.60 NA TYPICAL VALUES LAVE Maintenance Factor 0.90 q0 0.070 Road Reflectance Class R3
  8. 8. November 01, 2013 _Sector Confidential8 King Fahad & Tahaliya Roads Intersection Underpass LED Lighting TARGET VALUES: WALL GRAZE King Fahad Road being one of Riyadh’s busiest streets, is bustling with lighted buildings and multiple road lighting posts and highmasts, thus we can consider it to have high ambient light level with an average vertical target of 560 lux from beginning to the end of the wall sign.
  9. 9. November 01, 2013 _Sector Confidential9 King Fahad & Tahaliya Roads Intersection Underpass LED Lighting LIGHTING LAYOUT Section View LED6444 will provide Day and Night lighting to the underpass eW GrazeMX Powercore for Wall Grazing & Emergency
  10. 10. November 01, 2013 _Sector Confidential10 King Fahad & Tahaliya Roads Intersection Underpass LED Lighting LIGHTING LAYOUT Plan View
  11. 11. November 01, 2013 _Sector Confidential11 King Fahad & Tahaliya Roads Intersection Underpass LED Lighting LIGHTING LAYOUT Wall Mounting Details Luminaire Spacing
  12. 12. November 01, 2013 _Sector Confidential12 King Fahad & Tahaliya Roads Intersection Underpass LED Lighting CALCULATION RESULTS* *Since the layout is typical and mirrored, we shall show only results of 1 direction CALCULATION RESULTS SUMMARY FOR DAY TIME LIGHTING Target Values ENTRANCE (40 m) MIDDLE (41 m) EXIT (40 m) Eave = 500 lux 480 lux 511 lux 480 lux G1 (min/ave) = 0.40 0.571 0.901 0.571 Lave = 22.8 cd/m2 22 cd/m² 23 cd/m² 20 cd/m² U0 = 0.40 0.57 0.86 0.44 UL = 0.60 0.63 0.99 0.49 CALCULATION RESULTS SUMMARY FOR NIGHT TIME LIGHTING Target Values ENTRANCE (40 m) MIDDLE (41 m) EXIT (40 m) Eave = 90 lux 92 lux 97 lux 92 lux G1 (min/ave) = 0.40 0.493 0.685 0.492 Lave = 4.0 cd/m2 4.22 cd/m² 4.41 cd/m² 3.90 cd/m² U0 = 0.40 0.60 0.87 0.37 UL = 0.60 0.63 0.93 0.49 CALCULATION RESULTS SUMMARY FOR WALL GRAZE LIGHTING Target Values BEGINNING TO END (160 m) Eave = 560 lux (North) 600 lux Eave = 560 lux (South) 596 lux
  13. 13. Thank you for your valued attention! michael.santiago@philips.com 966-11-4940658 ext 113 966-56-262-3490
  14. 14. November 01, 2013 _Sector Confidential14

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