UNSPSC 46161525: Vehicle detection loop coil

A detector that is designed to detect the conversion signal with the change of high frequency inductance that is formed on the coil part as the vehicle enters on top of the loop coil by sending the constant high frequency magnetic signal current with the burial on the road surface.

UNSPSC 46161525 Vehicle detection loop coil is a Commodity code identifying inductive loop detectors and related traffic sensing equipment that state and local transportation agencies install, replace, and repair to detect vehicle and bicycle presence in traffic signal and ramp metering systems. State and local procurement under this code centers on the physical loop coils themselves—the sawcut conduit installations, pull boxes, covers, and associated electrical infrastructure—as well as the labor and materials required to deploy them in active roadways during both daytime and nighttime traffic control windows. Recent solicitations show replacement and restoration work on non-functioning loops of varying types (Type A, C, and D detectors ranging from 6'6" to 50'6" in length) and auxiliary equipment such as census controller cabinets, dynamic lane control devices, and communication systems integration.

The California Department of Transportation (Caltrans) dominates recent activity under this code, posting nine of eleven opportunities in the dataset across multiple districts and counties—Caltrans District 01 (Humboldt County), District 04 (Alameda County), District 08 (Riverside and San Bernardino Counties), District 10 (eight-county footprint in the Central Valley), District 11 (San Diego and Imperial Counties), and District 12 (Orange County). Small Business (SB) Minor B designations are standard on Caltrans contracts under this code, with most opportunities restricted to certified small businesses; Disabled Veteran Business Enterprise (DVBE) participation goals or incentives appear on most awards. Marion County, Florida (Office of the County Engineer) and Broward County Transit represent non-Caltrans procurement, though the Broward opportunity addresses CAD/AVL systems rather than loop coil equipment. Recent Caltrans bid opportunities range from approximately $81,600 to $484,000 in estimated cost, with contract terms typically spanning 24 to 36 months for ongoing repair and maintenance services. Geographic concentration is heavy in California, with secondary activity in Florida. Representative recent opportunities include Caltrans IFB 05A2967 for inductive loop detector replacement and restoration across Santa Barbara, San Luis Obispo, Monterey, San Benito, and Santa Cruz Counties (due July 23, 2026, seeking 385 loop detector replacements across seven line items with 25 percent SB participation goal and 10 percent DVBE requirement), Caltrans IFB 08A3979 for inductive loop repair in Riverside and San Bernardino Counties (due April 28, 2026, covering 200 sawcut-and-replace units and 50 detection station repairs), and Caltrans IFB 10A2900 for loop detector replacement across eight Central Valley counties (due April 16, 2026, involving 185 non-functioning detectors and associated pull box and conduit work with 25 percent SB goal and 3 percent DVBE requirement).