Tesla Semi trucks equipped with Full Self-Driving validation hardware have been spotted on California roads again — and the frequency of these sightings suggests the program is well past early exploration. Here's what the latest footage reveals and what it tells us about where autonomous trucking is headed. 1. These Sightings Are Becoming Routine — and That's Significant The Tesla Semi spotted this week is far from an isolated case. According to multiple reports, validation-equipped Semis were observed on public roads in Sunnyvale, Palo Alto, and Fremont across at least four separate dates in June 2026 alone — June 20, 21, 24, and 27. When a test program reaches this kind of cadence on public roads, it typically signals a transition from early feasibility work to structured data collection. Tesla isn't just checking whether FSD can run on a Class 8 truck; it's actively building the dataset to make it work reliably. 2. The Hardware Configuration Points to Production Intent The validation equipment visible on these Semis isn't prototype-only gear. The trucks are running a suite of 10 external cameras with camera washers — a configuration consistent with production-intent autonomous sensor hardware. Tesla is also using Hardware 4 (HW4) as the FSD compute platform on the Semi, the same generation Elon Musk described in April 2026 as sufficient for achieving "much better than human safety for FSD" in passenger vehicles. Samsung serves as the exclusive camera supplier for the Semi platform. The fact that these are production-spec components, not bolted-on research rigs, matters: Tesla is validating the system it actually plans to ship. 3. The FSD Model Is Being Rebuilt From Scratch for Trucking Tesla isn't simply porting its passenger-car FSD stack onto the Semi and calling it done. According to background research, Tesla is remodeling its FSD AI specifically