IMSA Roadway Lighting II case studies
IMSA Roadway Lighting II · Put your knowledge to work in context.
IMSA Roadway Lighting is one of the certification areas the International Municipal Signal Association lists among its industry certifications, alongside Work Zone Temporary Traffic Control, Traffic Signal, Signs and Markings, and Fiber Optics. The association's public pages describe its certifications as a way to validate expertise and advance a career, and IMSA states that more than 24,000 professionals currently hold an IMSA certification. The IMSA Roadway Lighting II case studies are 5 cases and about 2,604 words.
1Post-Installation Illuminance Audit on a New Arterial
A newly installed 1.4-mile section of four-lane urban arterial is designed to a maintained average of 1.1 fc with a maximum-to-minimum ratio of 3.5:1. The geometry is 40 mph, 30-ft mounting height, 150-ft staggered spacing, 8,000-lm LED luminaires, 4000 K, and Type III distribution.
492 words, about 2 min2Intersection Lighting: Adopted Standard Versus Dark-Sky Ordinance
An intersection of a two-lane state route and a county road is being reconstructed. The state route is 45 mph with 8,000 vehicles per day; the county road is 30 mph with 2,500 vpd.
462 words, about 2 min3Nuisance Tripping and Driver Failures on a 347-V LED Circuit
A 60-pole, 347-V single-phase LED roadway lighting circuit uses 150-W luminaires with 0-10V dimming controlled by a central lighting control panel. Each 20-A breaker serves eight luminaires.
579 words, about 3 min4Adding Banners and an Antenna to an Existing 35-ft Pole
A 35-ft galvanized steel pole supports a 4-ft davit arm and a 55-lb LED luminaire. The pole was designed for a base moment of 12,000 ft-lb at 90 mph, Exposure C.
522 words, about 3 min5Storm Damage: Leaning Pole and Exposed 277-V Conductors
A maintenance crew responds to a nighttime outage on a 277/480-V parking-lot and roadway lighting circuit after a severe storm. They find a 30-ft wood pole leaning about 10 degrees over a sidewalk, with the handhole cover missing and exposed energized conductors visible.
549 words, about 3 min