The usefulness of single-journey data in a hybrid car

This week I drove into and out of central London, into the congestion charging zone, in my self-charging hybrid car for the first time this year. It’s about a 60-mile trip each way for me on the A4 and M4 motorway. Much of the journey on the M4 is under 50mph or 60mph speed limits due to the huge smart motorway project to widen that whole stretch to four lanes each way between J12 at Theale and J3 at Hayes.…

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