Professional Traffic Controller System Support Services

The City of Stockton, CA seeks a vendor to provide professional traffic controller system support services for its existing D4 traffic signal controller software. The buyer requires the selected vendor to manage, coordinate, service, and prepare all required work to support the city's use and updating of the operational D4 software across its signal network. The scope includes providing access to D4 Utilities software with timely over-the-air updates, delivering annual remote training on new or modified features, and communicating the city's interests regarding future D4 development. The buyer mandates offsite work performance and restricts eligibility to onshore USA organizations. Bidders may submit responses digitally via email or online, and the buyer requests proposals for the budget. Interested parties must submit all questions no later than October 5, 2026.