Advanced Lighting Measurement System (ALMS)

Lighting Level Assessment

• Review lighting patterns along a corridor or the whole network
• Visualize lighting patterns using heatmaps and statistics
• Check if lighting patterns meet transportation agencies' standards
• Assess the lighting performance of the corridor or the network
• Identify the spots with poor lighting performance

Validate Lighting Retrofits

• FDOT is conducting lighting retrofit projects at more than 2,000 signalized intersection for pedestrian safety
• New and reconstructed signalized intersections with crosswalks will have vertical illumination
• A quality assurance review of intersection lighting retrofits is crucial.
• Validate lighting retrofit design and construction

Comparision of LED and HPS

• Light-emitting diodes (LEDs) are fourth-generation light sources developed as an energy-efficient alternative to traditional street lighting (i.e., HPS)
• Over 100 intersections and over 10 state roads have been retrofitted to LED streetlights in Tampa Bay in the past 5 years
• Use ALMS data to evaluate the lighting performance of LEDs on SR56
• LEDs greatly increase the average lighting levels
• LEDs greatly improves the uniformity

Lighting Diagnosis for Crash Spots

• Inspect lighting patterns of crash hotspots
• Determine if lighting is a contributor to crash risk
• Case Study - Top pedestrian crash corridor
• 14th SW St., Bradenton, from 49th Ave to Florida Blvd
• Top 5 pedestrian crash corridor in Florida
• Poor lighting Level - average 0.56 fc
• Lighiting is a contributing factor

Nighttime Safety Management

• Quantify the relahtionship between nighttime crash risks and lighting patterns
• Average Lighting Level and Uniformity
• Safety Performance Functions (SPFs)
• Crash Modification Factors (CMFs)
• For vehicle and pedestrian crashes
• Select and prioritize potential roadway lighting retrofit projects for safety improvement
• Select road facilities by PSI (potential safety improvement)
• Estimate crash reduction and benefits of proposed potential lighting retrofit treatments
• Rank proposed lighting retrofit projects based on benefit-cost ratios
• Support transportation agnecies's decison-making in implementing roadway lighting improvement