NIGP 55017: Encapsulant, Traffic Loop Detector

NIGP 55017 Encapsulant, Traffic Loop Detector is an Item code encompassing replacement parts and materials used to seal and protect inductive loop detection systems embedded in roadway pavement at signalized intersections. State and local governments procure encapsulants as consumable maintenance supplies to repair or reinstall detection loops that have degraded, been damaged during resurfacing, or require periodic replacement as part of traffic signal system upkeep. The code captures both the encapsulant material itself and associated loop detector repair services. Issuing bodies include county departments of transportation, city transportation and streets departments, and independent municipalities. Pasco County Board of County Commissioners and the County of Sacramento Department of Transportation appear as active buyers in recent solicitations. Work is solicited across multiple service contexts: standalone traffic signal construction and modernization projects where loop detectors are installed as part of larger signalization buildouts, as-needed maintenance and repair services through prequalified contractor pools, and bundled traffic signal parts procurement on a discount-from-catalog basis that explicitly includes detection systems alongside signal heads, poles, and wiring.

Recent activity spans Florida, California, Georgia, North Carolina, and Wisconsin. The County of Sacramento Department of Transportation issued RFB 2026-RFB-0056 for traffic signal parts in August 2026 structured as a cooperative purchasing vehicle through the Sacramento County Procurement Alliance (SCoPA), covering four product bundles including detection systems, with a contract term running from September 7, 2026 through September 6, 2027 and optional annual renewals through 2031. Pasco County Board of County Commissioners solicited construction bids for a four-pole box-span traffic signal installation (IFBKM27010, due October 27, 2026) and a similar installation at State Road 56 and LaJuana Boulevard (IFBKM26086, due June 16, 2026). The City of Tallahassee issued RFSQ07826CPW (July 31, 2026) establishing a prequalified contractor pool that explicitly includes detection loops and minor underground work as a discrete service category. The City of Atlanta Department of Transportation included loop detector repairs in its street resurfacing IFB (August 3, 2026) as part of right-of-way improvements under the Local Maintenance and Improvement Grant program.