Quality Assurance Review of Intersection Lighting Retrofits

Details

• Creators:
  Lin, Pei-Sung ; Wang, Zhenyu ; Vasili, Abhijit ; Kolla, Rama
• Corporate Creators:
  University of South Florida. Center for Urban Transportation Research
• Corporate Contributors:
  Florida Department of Transportation
• Subject/TRT Terms:
  • Crosswalks
  • Luminance
  • Pedestrian safety
  • Quality assurance
  • Retrofitting
  • Signalized intersections
  • Street lighting
  • Traffic safety
• Resource Type:
  Tech Report
• Geographical Coverage:
  Florida ; United States
• Edition:
  Final
• Corporate Publisher:
  Florida. Department of Transportation
• Abstract:
  To effectively reduce fatal pedestrian and traffic crashes in Florida, the Florida Department of Transportation (FDOT) is taking a robust approach towards adequate lighting for pedestrians. There are more than 2,000 signalized intersection lighting retrofits currently underway. They will be completed by 2021. New and reconstructed signalized intersections with crosswalks will have vertical illumination. To successfully accomplish this goal, a quality assurance review of intersection lighting retrofits is crucial. This project developed an innovative measurement technique to collect adequate illumination data in a safe, efficient, and high-quality way. The Center for Urban Transportation Research (CUTR) team used the system to measure both horizontal illuminance and vertical illuminance on each illuminated crosswalk at 23 signalized intersections in FDOT Districts 1, 2, 3, 4, 6, and 7. The measured illuminance values were compared to the theoretical values obtained from the design files at the same measurement points. Comparison tables and satellite maps were used to present the comparison results for verifying the lighting system design and upgrade. The major findings include the following: • The measured illuminance data reflect the “real” lighting patterns at signalized intersections. • The measured illuminance values at some measurement points are significantly different from the theoretical values as a result of external factors such as shadows and external lighting resources.
• Format:
  PDF
• Funding:
  FDOT BDV25-977-60
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/64479/dot_64479_DS1.pdf
• File Type:
  [PDF - 14.19 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:9ded865fac09be36da3135cad40fd89e43f3657ede914facd90581e43fea9614