IMSA Bench Tech II case studies
IMSA Bench Tech II · Put your knowledge to work in context.
The IMSA Bench Technician II credential sits within the family of certifications offered by the International Municipal Signal Association (IMSA), a professional association for public-safety and transportation infrastructure workers. IMSA states that 24,000+ professionals currently hold its certifications, and it lists five certification areas: Work Zone Temporary Traffic Control, Traffic Signal, Signs and Markings, Roadway Lighting, and Fiber Optics. The IMSA Bench Tech II case studies are 5 cases and about 3,336 words.
1Intermittent Red-Fail Trips on a TS2 Conflict Monitor
A NEMA TS2 cabinet at a six-phase intersection with LED signal heads has logged four conflict-monitor trips in three weeks, every one during or within a day of rain. The event log shows 'Red Fail, Phase 4' each time.
747 words, about 4 min2Solar School-Zone Beacon Fading on Overcast Afternoons
A solar-powered school zone beacon on a two-lane collector uses two 12-inch LED beacon heads, a 12 V flasher, a 100 W panel, a 100 Ah AGM battery, and a charge controller with low-voltage disconnect at 11.8 V. The school zone operates 7:15-8:15 a.m.
632 words, about 3 min3Pavement Marking Retroreflectivity Below Contract After Restriping
A 1.5-mile, four-lane arterial was restriped three weeks ago with waterborne white paint and drop-on glass beads. The contract requires white lane lines to average at least 200 mcd/m2/lx at 30-m geometry, measured per ASTM E1710, with no individual reading below 150.
620 words, about 3 min4Wet-Weather Breaker Trips on a Street Lighting Circuit
A 120/240 V single-phase street lighting circuit feeds eight 100 W LED cobra-head luminaires on concrete poles along a half-mile section. The 20 A breaker at the service panel trips about once a week, usually during or after rain, and resets without trouble.
666 words, about 3 min5Right-Lane Closure With a Crest, a Driveway, and a Crosswalk
A four-lane undivided arterial, 45 mph posted, with 12-ft lanes and 12,000 vehicles per day, needs a right-lane closure for three days to replace a storm drain inlet. The work area is 180 ft long.
671 words, about 3 min