Neil Fulton is debating what sort of persona to give the driverless cars that are soon to hit the not-so-mean streets of Milton Keynes.
"Are they going to be polite and let people pass in front of them?" he asks.
"There is a danger that if they are too polite, they wouldn't make any progression. But, on the other hand, we couldn't have aggressive vehicles that present safety issues so we might be better targeting assertive vehicles that provide some sort of audible or visual warning when they are going to do something."
Mr Fulton heads a project known formally as the Lutz (low carbon urban transport zone) Pathfinder programme, which will see three full-electric and driverless pods tested on the streets (or more accurately the pavements) of Milton Keynes by the end of 2015.
If successful, a bigger fleet will be ordered and 100 vehicles could go into public service by 2017. They will act as taxis around the city.
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