IMSA Traffic Signal II case studies
IMSA Traffic Signal II · Put your knowledge to work in context.
IMSA Traffic Signal Technician Level II (TST II) is an intermediate credential in the traffic signal track offered by the International Municipal Signal Association, a public-safety professional association that lists Traffic Signal among the certification areas it administers, alongside Work Zone Temporary Traffic Control, Signs and Markings, Roadway Lighting, and Fiber Optics. The credential is aimed at technicians who already work in the field - installing, energizing, timing, and maintaining signalized intersections - and who want independent validation of that experience rather than a classroom-only certificate. The IMSA Traffic Signal II case studies are 5 cases and about 4,385 words.
1Mast Arm Layout That Fails the Two-Face Rule
An agency is reviewing a 60-percent design for a new signal on a four-lane arterial posted at 45 mph. Curb-to-curb is 60 ft: a 12-ft left-turn lane and two 12-ft through lanes on the eastbound approach, and two 12-ft through lanes opposite.
847 words, about 4 min2Conduit Run Rejected Three Days Before Paving
On a new signal installation the contractor has installed a 4-in PVC conduit run from the controller cabinet to the far-side pole: 260 ft, laid at 18-in cover beneath a gravel shoulder that is scheduled to be paved Monday. The run has three factory 90-degree sweeps and no pull boxes.
864 words, about 4 min3Pedestrian Clearance Blows Up Corridor Coordination
A six-intersection arterial runs a 90-s coordinated-actuated cycle in the PM peak. At intersection 4, phase 2 (arterial through) split is 45 s and phase 4 (minor street) split is 15 s.
823 words, about 4 min4Conflict-Monitor Trips Every Afternoon After a Head Replacement
A four-legged intersection drops to flashing almost every afternoon around 14:00 on warm days. Three weeks ago a contractor replaced a span-mounted three-section head and its cable at the far-side pole.
870 words, about 4 min5Night Lane Closure Through an Active Signalized Intersection
A paving subcontractor wants to close the right through lane of a two-lane, 12-ft, 40-mph arterial from 7 pm to 5 am for milling and overlay. The work is 350 ft downstream of a freeway off-ramp.
981 words, about 5 min