IMSA Work Zone case studies
IMSA Work Zone · Put your knowledge to work in context.
The IMSA Work Zone Temporary Traffic Control Technician is one of the certification programs offered by the International Municipal Signal Association (IMSA), a public safety association that also certifies professionals in traffic signal, signs and markings, roadway lighting, and fiber optics. IMSA states that 24,000+ professionals currently hold an IMSA certification. The IMSA Work Zone case studies are 5 cases and about 3,865 words.
1The 900-Ft Segment: When the Standard Closure Won't Fit
A county crew will patch a 200-ft section of the right lane of a rural two-lane highway: one 12-ft lane each direction, 4-ft shoulders, posted 45 mph, 8% trucks, peak 400 veh/h (about 200 veh/h per direction). Work is daytime, roughly eight hours, with traffic maintained in both directions.
780 words, about 4 min2Night Paving: Which Deficiencies Stop the Train
Night paving on a 40-mph urban arterial with three 11-ft lanes in each direction. The plan closes the right lane for 1,200 ft using drums at 60-ft spacing plus a truck-mounted attenuator, and paving will run five nights.
760 words, about 4 min3Utility Closure on a Busy Arterial: Geometry, Pedestrians, and Access
Utility work on a 35-mph urban arterial with three 11-ft lanes in each direction calls for closing the right lane for 600 ft during the day. The plan shows a 200-ft transition taper, 100 ft of buffer, the 600-ft work area, and a 50-ft downstream taper, with 28-in cones at 25-ft spacing.
729 words, about 4 min4Shoulder Work at 65 mph: Near-Misses and a Budget Objection
Night shoulder work on a 65-mph rural interstate. A crew of nine is patching pavement on a 10-ft right shoulder, with workers standing about 3 ft from the travel lane.
797 words, about 4 min5Day Two of a Long-Term Closure: Missing Sign, Short Taper, Unauthorized Change
Day two of a three-week left-lane closure on a 55-mph rural four-lane divided highway, for bridge deck repair. The plan calls for a 500-ft transition taper, 495 ft of buffer protected by a truck-mounted attenuator, and drums along the work area.
799 words, about 4 min