STC successfully delivered the first-of-its-kind Sustainable Freight Demonstration Project along a four-mile segment of Harbor Drive in the Cities of San Diego and National City. Funded by a nearly $6M California Energy Commission grant awarded to the San Diego Port Tenants Association, the project implemented an Intelligent Transportation System (ITS) with Freight Signal Priority (FSP) to enhance goods movement for port tenant fleet operators. STC led the project from concept through implementation, including developing the Concept of Operations (ConOps), designing the systems architecture, and managing final design, systems deployment, testing, and integration. The project required extensive project management, procurement of technical equipment, network engineering, and coordination with more than a dozen stakeholders including the Port of San Diego, SDPTA, fleet operators, equipment vendors, local municipalities, SANDAG, Caltrans, and Naval Base San Diego.

The demonstration period, extended due to the COVID-19 pandemic, included continuous data collection and validation, measuring travel time, speed, idle time, and emissions. Results showed a 15% reduction in moving emissions and a 27% decrease in idle emissions per run, proving the effectiveness of FSP in reducing harmful pollutants and improving efficiency. This project serves as a scalable model for sustainable freight operations, highlighting STC’s expertise in delivering innovative ITS solutions with measurable environmental benefits.

Awards: 2022 ITE Excellence in Transportation