What data did you create on your last trip? Texts, photos, card payments, ticket scans, and location records may feel like separate events. Together, they form data streams: successive flows of information generated as people and systems go about their activities. section 8.2.2 section 8.3
A trip that keeps generating data
A restaurant visit can add photos, payment and tip records, and dining preferences. A hotel stay can add check-in times and loyalty points. The next day, a stadium ticket scan and phone location can place a visitor at a particular event and seating section. No single action tells the whole story; the stream grows across the day. section 8.2.2
Roads and cars add newer streams alongside familiar ones. Vehicle-to-vehicle communication can exchange speed, location, and heading. Vehicle-to-infrastructure communication can exchange information between cars and road features such as signs or traffic lights. These exchanges are being developed for safety and mobility, while electric vehicles can send detailed operational data to manufacturers. section 8.2.3 section 8.3
The practical question is not only how much data is created, but who can see and combine it. A location stream might be available to an app, an employer, or another organization. When a service asks to track you, consider what it can learn from repeated observations—not just from one moment. section 2.4.1 section 8.2.2
